mirror of
https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-09 01:28:05 -04:00
Fixed MTP to work with TWRP
This commit is contained in:
awab228
commit
f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
886
net/atm/br2684.c
Normal file
886
net/atm/br2684.c
Normal file
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@ -0,0 +1,886 @@
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/*
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* Ethernet netdevice using ATM AAL5 as underlying carrier
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* (RFC1483 obsoleted by RFC2684) for Linux
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*
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* Authors: Marcell GAL, 2000, XDSL Ltd, Hungary
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* Eric Kinzie, 2006-2007, US Naval Research Laboratory
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/netdevice.h>
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#include <linux/skbuff.h>
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#include <linux/etherdevice.h>
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#include <linux/rtnetlink.h>
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#include <linux/ip.h>
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#include <linux/uaccess.h>
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#include <linux/slab.h>
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#include <net/arp.h>
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#include <linux/atm.h>
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#include <linux/atmdev.h>
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#include <linux/capability.h>
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#include <linux/seq_file.h>
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#include <linux/atmbr2684.h>
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#include "common.h"
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static void skb_debug(const struct sk_buff *skb)
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{
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#ifdef SKB_DEBUG
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#define NUM2PRINT 50
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print_hex_dump(KERN_DEBUG, "br2684: skb: ", DUMP_OFFSET,
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16, 1, skb->data, min(NUM2PRINT, skb->len), true);
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#endif
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}
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#define BR2684_ETHERTYPE_LEN 2
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#define BR2684_PAD_LEN 2
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#define LLC 0xaa, 0xaa, 0x03
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#define SNAP_BRIDGED 0x00, 0x80, 0xc2
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#define SNAP_ROUTED 0x00, 0x00, 0x00
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#define PID_ETHERNET 0x00, 0x07
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#define ETHERTYPE_IPV4 0x08, 0x00
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#define ETHERTYPE_IPV6 0x86, 0xdd
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#define PAD_BRIDGED 0x00, 0x00
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static const unsigned char ethertype_ipv4[] = { ETHERTYPE_IPV4 };
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static const unsigned char ethertype_ipv6[] = { ETHERTYPE_IPV6 };
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static const unsigned char llc_oui_pid_pad[] =
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{ LLC, SNAP_BRIDGED, PID_ETHERNET, PAD_BRIDGED };
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static const unsigned char pad[] = { PAD_BRIDGED };
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static const unsigned char llc_oui_ipv4[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV4 };
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static const unsigned char llc_oui_ipv6[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV6 };
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enum br2684_encaps {
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e_vc = BR2684_ENCAPS_VC,
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e_llc = BR2684_ENCAPS_LLC,
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};
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struct br2684_vcc {
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struct atm_vcc *atmvcc;
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struct net_device *device;
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/* keep old push, pop functions for chaining */
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void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb);
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void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb);
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void (*old_release_cb)(struct atm_vcc *vcc);
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struct module *old_owner;
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enum br2684_encaps encaps;
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struct list_head brvccs;
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#ifdef CONFIG_ATM_BR2684_IPFILTER
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struct br2684_filter filter;
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#endif /* CONFIG_ATM_BR2684_IPFILTER */
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unsigned int copies_needed, copies_failed;
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atomic_t qspace;
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};
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struct br2684_dev {
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struct net_device *net_dev;
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struct list_head br2684_devs;
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int number;
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struct list_head brvccs; /* one device <=> one vcc (before xmas) */
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int mac_was_set;
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enum br2684_payload payload;
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};
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/*
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* This lock should be held for writing any time the list of devices or
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* their attached vcc's could be altered. It should be held for reading
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* any time these are being queried. Note that we sometimes need to
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* do read-locking under interrupt context, so write locking must block
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* the current CPU's interrupts
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*/
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static DEFINE_RWLOCK(devs_lock);
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static LIST_HEAD(br2684_devs);
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static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev)
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{
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return netdev_priv(net_dev);
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}
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static inline struct net_device *list_entry_brdev(const struct list_head *le)
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{
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return list_entry(le, struct br2684_dev, br2684_devs)->net_dev;
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}
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static inline struct br2684_vcc *BR2684_VCC(const struct atm_vcc *atmvcc)
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{
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return (struct br2684_vcc *)(atmvcc->user_back);
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}
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static inline struct br2684_vcc *list_entry_brvcc(const struct list_head *le)
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{
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return list_entry(le, struct br2684_vcc, brvccs);
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}
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/* Caller should hold read_lock(&devs_lock) */
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static struct net_device *br2684_find_dev(const struct br2684_if_spec *s)
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{
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struct list_head *lh;
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struct net_device *net_dev;
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switch (s->method) {
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case BR2684_FIND_BYNUM:
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list_for_each(lh, &br2684_devs) {
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net_dev = list_entry_brdev(lh);
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if (BRPRIV(net_dev)->number == s->spec.devnum)
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return net_dev;
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}
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break;
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case BR2684_FIND_BYIFNAME:
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list_for_each(lh, &br2684_devs) {
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net_dev = list_entry_brdev(lh);
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if (!strncmp(net_dev->name, s->spec.ifname, IFNAMSIZ))
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return net_dev;
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}
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break;
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}
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return NULL;
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}
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static int atm_dev_event(struct notifier_block *this, unsigned long event,
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void *arg)
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{
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struct atm_dev *atm_dev = arg;
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struct list_head *lh;
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struct net_device *net_dev;
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struct br2684_vcc *brvcc;
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struct atm_vcc *atm_vcc;
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unsigned long flags;
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pr_debug("event=%ld dev=%p\n", event, atm_dev);
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read_lock_irqsave(&devs_lock, flags);
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list_for_each(lh, &br2684_devs) {
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net_dev = list_entry_brdev(lh);
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list_for_each_entry(brvcc, &BRPRIV(net_dev)->brvccs, brvccs) {
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atm_vcc = brvcc->atmvcc;
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if (atm_vcc && brvcc->atmvcc->dev == atm_dev) {
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if (atm_vcc->dev->signal == ATM_PHY_SIG_LOST)
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netif_carrier_off(net_dev);
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else
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netif_carrier_on(net_dev);
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}
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}
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}
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read_unlock_irqrestore(&devs_lock, flags);
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return NOTIFY_DONE;
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}
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static struct notifier_block atm_dev_notifier = {
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.notifier_call = atm_dev_event,
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};
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/* chained vcc->pop function. Check if we should wake the netif_queue */
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static void br2684_pop(struct atm_vcc *vcc, struct sk_buff *skb)
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{
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struct br2684_vcc *brvcc = BR2684_VCC(vcc);
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pr_debug("(vcc %p ; net_dev %p )\n", vcc, brvcc->device);
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brvcc->old_pop(vcc, skb);
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/* If the queue space just went up from zero, wake */
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if (atomic_inc_return(&brvcc->qspace) == 1)
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netif_wake_queue(brvcc->device);
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}
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/*
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* Send a packet out a particular vcc. Not to useful right now, but paves
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* the way for multiple vcc's per itf. Returns true if we can send,
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* otherwise false
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*/
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static int br2684_xmit_vcc(struct sk_buff *skb, struct net_device *dev,
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struct br2684_vcc *brvcc)
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{
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struct br2684_dev *brdev = BRPRIV(dev);
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struct atm_vcc *atmvcc;
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int minheadroom = (brvcc->encaps == e_llc) ?
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((brdev->payload == p_bridged) ?
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sizeof(llc_oui_pid_pad) : sizeof(llc_oui_ipv4)) :
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((brdev->payload == p_bridged) ? BR2684_PAD_LEN : 0);
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if (skb_headroom(skb) < minheadroom) {
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struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom);
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brvcc->copies_needed++;
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dev_kfree_skb(skb);
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if (skb2 == NULL) {
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brvcc->copies_failed++;
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return 0;
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}
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skb = skb2;
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}
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if (brvcc->encaps == e_llc) {
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if (brdev->payload == p_bridged) {
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skb_push(skb, sizeof(llc_oui_pid_pad));
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skb_copy_to_linear_data(skb, llc_oui_pid_pad,
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sizeof(llc_oui_pid_pad));
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} else if (brdev->payload == p_routed) {
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unsigned short prot = ntohs(skb->protocol);
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skb_push(skb, sizeof(llc_oui_ipv4));
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switch (prot) {
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case ETH_P_IP:
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skb_copy_to_linear_data(skb, llc_oui_ipv4,
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sizeof(llc_oui_ipv4));
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break;
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case ETH_P_IPV6:
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skb_copy_to_linear_data(skb, llc_oui_ipv6,
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sizeof(llc_oui_ipv6));
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break;
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default:
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dev_kfree_skb(skb);
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return 0;
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}
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}
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} else { /* e_vc */
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if (brdev->payload == p_bridged) {
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skb_push(skb, 2);
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memset(skb->data, 0, 2);
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}
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}
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skb_debug(skb);
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ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
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pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
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atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc);
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ATM_SKB(skb)->atm_options = atmvcc->atm_options;
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dev->stats.tx_packets++;
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dev->stats.tx_bytes += skb->len;
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if (atomic_dec_return(&brvcc->qspace) < 1) {
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/* No more please! */
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netif_stop_queue(brvcc->device);
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/* We might have raced with br2684_pop() */
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if (unlikely(atomic_read(&brvcc->qspace) > 0))
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netif_wake_queue(brvcc->device);
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}
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/* If this fails immediately, the skb will be freed and br2684_pop()
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will wake the queue if appropriate. Just return an error so that
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the stats are updated correctly */
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return !atmvcc->send(atmvcc, skb);
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}
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|
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static void br2684_release_cb(struct atm_vcc *atmvcc)
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||||
{
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||||
struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
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||||
|
||||
if (atomic_read(&brvcc->qspace) > 0)
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||||
netif_wake_queue(brvcc->device);
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||||
|
||||
if (brvcc->old_release_cb)
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||||
brvcc->old_release_cb(atmvcc);
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||||
}
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|
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static inline struct br2684_vcc *pick_outgoing_vcc(const struct sk_buff *skb,
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||||
const struct br2684_dev *brdev)
|
||||
{
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||||
return list_empty(&brdev->brvccs) ? NULL : list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */
|
||||
}
|
||||
|
||||
static netdev_tx_t br2684_start_xmit(struct sk_buff *skb,
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||||
struct net_device *dev)
|
||||
{
|
||||
struct br2684_dev *brdev = BRPRIV(dev);
|
||||
struct br2684_vcc *brvcc;
|
||||
struct atm_vcc *atmvcc;
|
||||
netdev_tx_t ret = NETDEV_TX_OK;
|
||||
|
||||
pr_debug("skb_dst(skb)=%p\n", skb_dst(skb));
|
||||
read_lock(&devs_lock);
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||||
brvcc = pick_outgoing_vcc(skb, brdev);
|
||||
if (brvcc == NULL) {
|
||||
pr_debug("no vcc attached to dev %s\n", dev->name);
|
||||
dev->stats.tx_errors++;
|
||||
dev->stats.tx_carrier_errors++;
|
||||
/* netif_stop_queue(dev); */
|
||||
dev_kfree_skb(skb);
|
||||
goto out_devs;
|
||||
}
|
||||
atmvcc = brvcc->atmvcc;
|
||||
|
||||
bh_lock_sock(sk_atm(atmvcc));
|
||||
|
||||
if (test_bit(ATM_VF_RELEASED, &atmvcc->flags) ||
|
||||
test_bit(ATM_VF_CLOSE, &atmvcc->flags) ||
|
||||
!test_bit(ATM_VF_READY, &atmvcc->flags)) {
|
||||
dev->stats.tx_dropped++;
|
||||
dev_kfree_skb(skb);
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (sock_owned_by_user(sk_atm(atmvcc))) {
|
||||
netif_stop_queue(brvcc->device);
|
||||
ret = NETDEV_TX_BUSY;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (!br2684_xmit_vcc(skb, dev, brvcc)) {
|
||||
/*
|
||||
* We should probably use netif_*_queue() here, but that
|
||||
* involves added complication. We need to walk before
|
||||
* we can run.
|
||||
*
|
||||
* Don't free here! this pointer might be no longer valid!
|
||||
*/
|
||||
dev->stats.tx_errors++;
|
||||
dev->stats.tx_fifo_errors++;
|
||||
}
|
||||
out:
|
||||
bh_unlock_sock(sk_atm(atmvcc));
|
||||
out_devs:
|
||||
read_unlock(&devs_lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* We remember when the MAC gets set, so we don't override it later with
|
||||
* the ESI of the ATM card of the first VC
|
||||
*/
|
||||
static int br2684_mac_addr(struct net_device *dev, void *p)
|
||||
{
|
||||
int err = eth_mac_addr(dev, p);
|
||||
if (!err)
|
||||
BRPRIV(dev)->mac_was_set = 1;
|
||||
return err;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
||||
/* this IOCTL is experimental. */
|
||||
static int br2684_setfilt(struct atm_vcc *atmvcc, void __user * arg)
|
||||
{
|
||||
struct br2684_vcc *brvcc;
|
||||
struct br2684_filter_set fs;
|
||||
|
||||
if (copy_from_user(&fs, arg, sizeof fs))
|
||||
return -EFAULT;
|
||||
if (fs.ifspec.method != BR2684_FIND_BYNOTHING) {
|
||||
/*
|
||||
* This is really a per-vcc thing, but we can also search
|
||||
* by device.
|
||||
*/
|
||||
struct br2684_dev *brdev;
|
||||
read_lock(&devs_lock);
|
||||
brdev = BRPRIV(br2684_find_dev(&fs.ifspec));
|
||||
if (brdev == NULL || list_empty(&brdev->brvccs) ||
|
||||
brdev->brvccs.next != brdev->brvccs.prev) /* >1 VCC */
|
||||
brvcc = NULL;
|
||||
else
|
||||
brvcc = list_entry_brvcc(brdev->brvccs.next);
|
||||
read_unlock(&devs_lock);
|
||||
if (brvcc == NULL)
|
||||
return -ESRCH;
|
||||
} else
|
||||
brvcc = BR2684_VCC(atmvcc);
|
||||
memcpy(&brvcc->filter, &fs.filter, sizeof(brvcc->filter));
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Returns 1 if packet should be dropped */
|
||||
static inline int
|
||||
packet_fails_filter(__be16 type, struct br2684_vcc *brvcc, struct sk_buff *skb)
|
||||
{
|
||||
if (brvcc->filter.netmask == 0)
|
||||
return 0; /* no filter in place */
|
||||
if (type == htons(ETH_P_IP) &&
|
||||
(((struct iphdr *)(skb->data))->daddr & brvcc->filter.
|
||||
netmask) == brvcc->filter.prefix)
|
||||
return 0;
|
||||
if (type == htons(ETH_P_ARP))
|
||||
return 0;
|
||||
/*
|
||||
* TODO: we should probably filter ARPs too.. don't want to have
|
||||
* them returning values that don't make sense, or is that ok?
|
||||
*/
|
||||
return 1; /* drop */
|
||||
}
|
||||
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
||||
|
||||
static void br2684_close_vcc(struct br2684_vcc *brvcc)
|
||||
{
|
||||
pr_debug("removing VCC %p from dev %p\n", brvcc, brvcc->device);
|
||||
write_lock_irq(&devs_lock);
|
||||
list_del(&brvcc->brvccs);
|
||||
write_unlock_irq(&devs_lock);
|
||||
brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */
|
||||
brvcc->atmvcc->release_cb = brvcc->old_release_cb;
|
||||
brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */
|
||||
module_put(brvcc->old_owner);
|
||||
kfree(brvcc);
|
||||
}
|
||||
|
||||
/* when AAL5 PDU comes in: */
|
||||
static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
|
||||
{
|
||||
struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
|
||||
struct net_device *net_dev = brvcc->device;
|
||||
struct br2684_dev *brdev = BRPRIV(net_dev);
|
||||
|
||||
pr_debug("\n");
|
||||
|
||||
if (unlikely(skb == NULL)) {
|
||||
/* skb==NULL means VCC is being destroyed */
|
||||
br2684_close_vcc(brvcc);
|
||||
if (list_empty(&brdev->brvccs)) {
|
||||
write_lock_irq(&devs_lock);
|
||||
list_del(&brdev->br2684_devs);
|
||||
write_unlock_irq(&devs_lock);
|
||||
unregister_netdev(net_dev);
|
||||
free_netdev(net_dev);
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
skb_debug(skb);
|
||||
atm_return(atmvcc, skb->truesize);
|
||||
pr_debug("skb from brdev %p\n", brdev);
|
||||
if (brvcc->encaps == e_llc) {
|
||||
|
||||
if (skb->len > 7 && skb->data[7] == 0x01)
|
||||
__skb_trim(skb, skb->len - 4);
|
||||
|
||||
/* accept packets that have "ipv[46]" in the snap header */
|
||||
if ((skb->len >= (sizeof(llc_oui_ipv4))) &&
|
||||
(memcmp(skb->data, llc_oui_ipv4,
|
||||
sizeof(llc_oui_ipv4) - BR2684_ETHERTYPE_LEN) == 0)) {
|
||||
if (memcmp(skb->data + 6, ethertype_ipv6,
|
||||
sizeof(ethertype_ipv6)) == 0)
|
||||
skb->protocol = htons(ETH_P_IPV6);
|
||||
else if (memcmp(skb->data + 6, ethertype_ipv4,
|
||||
sizeof(ethertype_ipv4)) == 0)
|
||||
skb->protocol = htons(ETH_P_IP);
|
||||
else
|
||||
goto error;
|
||||
skb_pull(skb, sizeof(llc_oui_ipv4));
|
||||
skb_reset_network_header(skb);
|
||||
skb->pkt_type = PACKET_HOST;
|
||||
/*
|
||||
* Let us waste some time for checking the encapsulation.
|
||||
* Note, that only 7 char is checked so frames with a valid FCS
|
||||
* are also accepted (but FCS is not checked of course).
|
||||
*/
|
||||
} else if ((skb->len >= sizeof(llc_oui_pid_pad)) &&
|
||||
(memcmp(skb->data, llc_oui_pid_pad, 7) == 0)) {
|
||||
skb_pull(skb, sizeof(llc_oui_pid_pad));
|
||||
skb->protocol = eth_type_trans(skb, net_dev);
|
||||
} else
|
||||
goto error;
|
||||
|
||||
} else { /* e_vc */
|
||||
if (brdev->payload == p_routed) {
|
||||
struct iphdr *iph;
|
||||
|
||||
skb_reset_network_header(skb);
|
||||
iph = ip_hdr(skb);
|
||||
if (iph->version == 4)
|
||||
skb->protocol = htons(ETH_P_IP);
|
||||
else if (iph->version == 6)
|
||||
skb->protocol = htons(ETH_P_IPV6);
|
||||
else
|
||||
goto error;
|
||||
skb->pkt_type = PACKET_HOST;
|
||||
} else { /* p_bridged */
|
||||
/* first 2 chars should be 0 */
|
||||
if (memcmp(skb->data, pad, BR2684_PAD_LEN) != 0)
|
||||
goto error;
|
||||
skb_pull(skb, BR2684_PAD_LEN);
|
||||
skb->protocol = eth_type_trans(skb, net_dev);
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
||||
if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb)))
|
||||
goto dropped;
|
||||
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
||||
skb->dev = net_dev;
|
||||
ATM_SKB(skb)->vcc = atmvcc; /* needed ? */
|
||||
pr_debug("received packet's protocol: %x\n", ntohs(skb->protocol));
|
||||
skb_debug(skb);
|
||||
/* sigh, interface is down? */
|
||||
if (unlikely(!(net_dev->flags & IFF_UP)))
|
||||
goto dropped;
|
||||
net_dev->stats.rx_packets++;
|
||||
net_dev->stats.rx_bytes += skb->len;
|
||||
memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
|
||||
netif_rx(skb);
|
||||
return;
|
||||
|
||||
dropped:
|
||||
net_dev->stats.rx_dropped++;
|
||||
goto free_skb;
|
||||
error:
|
||||
net_dev->stats.rx_errors++;
|
||||
free_skb:
|
||||
dev_kfree_skb(skb);
|
||||
}
|
||||
|
||||
/*
|
||||
* Assign a vcc to a dev
|
||||
* Note: we do not have explicit unassign, but look at _push()
|
||||
*/
|
||||
static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg)
|
||||
{
|
||||
struct br2684_vcc *brvcc;
|
||||
struct br2684_dev *brdev;
|
||||
struct net_device *net_dev;
|
||||
struct atm_backend_br2684 be;
|
||||
int err;
|
||||
|
||||
if (copy_from_user(&be, arg, sizeof be))
|
||||
return -EFAULT;
|
||||
brvcc = kzalloc(sizeof(struct br2684_vcc), GFP_KERNEL);
|
||||
if (!brvcc)
|
||||
return -ENOMEM;
|
||||
/*
|
||||
* Allow two packets in the ATM queue. One actually being sent, and one
|
||||
* for the ATM 'TX done' handler to send. It shouldn't take long to get
|
||||
* the next one from the netdev queue, when we need it. More than that
|
||||
* would be bufferbloat.
|
||||
*/
|
||||
atomic_set(&brvcc->qspace, 2);
|
||||
write_lock_irq(&devs_lock);
|
||||
net_dev = br2684_find_dev(&be.ifspec);
|
||||
if (net_dev == NULL) {
|
||||
pr_err("tried to attach to non-existent device\n");
|
||||
err = -ENXIO;
|
||||
goto error;
|
||||
}
|
||||
brdev = BRPRIV(net_dev);
|
||||
if (atmvcc->push == NULL) {
|
||||
err = -EBADFD;
|
||||
goto error;
|
||||
}
|
||||
if (!list_empty(&brdev->brvccs)) {
|
||||
/* Only 1 VCC/dev right now */
|
||||
err = -EEXIST;
|
||||
goto error;
|
||||
}
|
||||
if (be.fcs_in != BR2684_FCSIN_NO ||
|
||||
be.fcs_out != BR2684_FCSOUT_NO ||
|
||||
be.fcs_auto || be.has_vpiid || be.send_padding ||
|
||||
(be.encaps != BR2684_ENCAPS_VC &&
|
||||
be.encaps != BR2684_ENCAPS_LLC) ||
|
||||
be.min_size != 0) {
|
||||
err = -EINVAL;
|
||||
goto error;
|
||||
}
|
||||
pr_debug("vcc=%p, encaps=%d, brvcc=%p\n", atmvcc, be.encaps, brvcc);
|
||||
if (list_empty(&brdev->brvccs) && !brdev->mac_was_set) {
|
||||
unsigned char *esi = atmvcc->dev->esi;
|
||||
if (esi[0] | esi[1] | esi[2] | esi[3] | esi[4] | esi[5])
|
||||
memcpy(net_dev->dev_addr, esi, net_dev->addr_len);
|
||||
else
|
||||
net_dev->dev_addr[2] = 1;
|
||||
}
|
||||
list_add(&brvcc->brvccs, &brdev->brvccs);
|
||||
write_unlock_irq(&devs_lock);
|
||||
brvcc->device = net_dev;
|
||||
brvcc->atmvcc = atmvcc;
|
||||
atmvcc->user_back = brvcc;
|
||||
brvcc->encaps = (enum br2684_encaps)be.encaps;
|
||||
brvcc->old_push = atmvcc->push;
|
||||
brvcc->old_pop = atmvcc->pop;
|
||||
brvcc->old_release_cb = atmvcc->release_cb;
|
||||
brvcc->old_owner = atmvcc->owner;
|
||||
barrier();
|
||||
atmvcc->push = br2684_push;
|
||||
atmvcc->pop = br2684_pop;
|
||||
atmvcc->release_cb = br2684_release_cb;
|
||||
atmvcc->owner = THIS_MODULE;
|
||||
|
||||
/* initialize netdev carrier state */
|
||||
if (atmvcc->dev->signal == ATM_PHY_SIG_LOST)
|
||||
netif_carrier_off(net_dev);
|
||||
else
|
||||
netif_carrier_on(net_dev);
|
||||
|
||||
__module_get(THIS_MODULE);
|
||||
|
||||
/* re-process everything received between connection setup and
|
||||
backend setup */
|
||||
vcc_process_recv_queue(atmvcc);
|
||||
return 0;
|
||||
|
||||
error:
|
||||
write_unlock_irq(&devs_lock);
|
||||
kfree(brvcc);
|
||||
return err;
|
||||
}
|
||||
|
||||
static const struct net_device_ops br2684_netdev_ops = {
|
||||
.ndo_start_xmit = br2684_start_xmit,
|
||||
.ndo_set_mac_address = br2684_mac_addr,
|
||||
.ndo_change_mtu = eth_change_mtu,
|
||||
.ndo_validate_addr = eth_validate_addr,
|
||||
};
|
||||
|
||||
static const struct net_device_ops br2684_netdev_ops_routed = {
|
||||
.ndo_start_xmit = br2684_start_xmit,
|
||||
.ndo_set_mac_address = br2684_mac_addr,
|
||||
.ndo_change_mtu = eth_change_mtu
|
||||
};
|
||||
|
||||
static void br2684_setup(struct net_device *netdev)
|
||||
{
|
||||
struct br2684_dev *brdev = BRPRIV(netdev);
|
||||
|
||||
ether_setup(netdev);
|
||||
netdev->hard_header_len += sizeof(llc_oui_pid_pad); /* worst case */
|
||||
brdev->net_dev = netdev;
|
||||
|
||||
netdev->netdev_ops = &br2684_netdev_ops;
|
||||
|
||||
INIT_LIST_HEAD(&brdev->brvccs);
|
||||
}
|
||||
|
||||
static void br2684_setup_routed(struct net_device *netdev)
|
||||
{
|
||||
struct br2684_dev *brdev = BRPRIV(netdev);
|
||||
|
||||
brdev->net_dev = netdev;
|
||||
netdev->hard_header_len = sizeof(llc_oui_ipv4); /* worst case */
|
||||
netdev->netdev_ops = &br2684_netdev_ops_routed;
|
||||
netdev->addr_len = 0;
|
||||
netdev->mtu = 1500;
|
||||
netdev->type = ARPHRD_PPP;
|
||||
netdev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST;
|
||||
netdev->tx_queue_len = 100;
|
||||
INIT_LIST_HEAD(&brdev->brvccs);
|
||||
}
|
||||
|
||||
static int br2684_create(void __user *arg)
|
||||
{
|
||||
int err;
|
||||
struct net_device *netdev;
|
||||
struct br2684_dev *brdev;
|
||||
struct atm_newif_br2684 ni;
|
||||
enum br2684_payload payload;
|
||||
|
||||
pr_debug("\n");
|
||||
|
||||
if (copy_from_user(&ni, arg, sizeof ni))
|
||||
return -EFAULT;
|
||||
|
||||
if (ni.media & BR2684_FLAG_ROUTED)
|
||||
payload = p_routed;
|
||||
else
|
||||
payload = p_bridged;
|
||||
ni.media &= 0xffff; /* strip flags */
|
||||
|
||||
if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500)
|
||||
return -EINVAL;
|
||||
|
||||
netdev = alloc_netdev(sizeof(struct br2684_dev),
|
||||
ni.ifname[0] ? ni.ifname : "nas%d",
|
||||
NET_NAME_UNKNOWN,
|
||||
(payload == p_routed) ? br2684_setup_routed : br2684_setup);
|
||||
if (!netdev)
|
||||
return -ENOMEM;
|
||||
|
||||
brdev = BRPRIV(netdev);
|
||||
|
||||
pr_debug("registered netdev %s\n", netdev->name);
|
||||
/* open, stop, do_ioctl ? */
|
||||
err = register_netdev(netdev);
|
||||
if (err < 0) {
|
||||
pr_err("register_netdev failed\n");
|
||||
free_netdev(netdev);
|
||||
return err;
|
||||
}
|
||||
|
||||
write_lock_irq(&devs_lock);
|
||||
|
||||
brdev->payload = payload;
|
||||
|
||||
if (list_empty(&br2684_devs)) {
|
||||
/* 1st br2684 device */
|
||||
brdev->number = 1;
|
||||
} else
|
||||
brdev->number = BRPRIV(list_entry_brdev(br2684_devs.prev))->number + 1;
|
||||
|
||||
list_add_tail(&brdev->br2684_devs, &br2684_devs);
|
||||
write_unlock_irq(&devs_lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* This handles ioctls actually performed on our vcc - we must return
|
||||
* -ENOIOCTLCMD for any unrecognized ioctl
|
||||
*/
|
||||
static int br2684_ioctl(struct socket *sock, unsigned int cmd,
|
||||
unsigned long arg)
|
||||
{
|
||||
struct atm_vcc *atmvcc = ATM_SD(sock);
|
||||
void __user *argp = (void __user *)arg;
|
||||
atm_backend_t b;
|
||||
|
||||
int err;
|
||||
switch (cmd) {
|
||||
case ATM_SETBACKEND:
|
||||
case ATM_NEWBACKENDIF:
|
||||
err = get_user(b, (atm_backend_t __user *) argp);
|
||||
if (err)
|
||||
return -EFAULT;
|
||||
if (b != ATM_BACKEND_BR2684)
|
||||
return -ENOIOCTLCMD;
|
||||
if (!capable(CAP_NET_ADMIN))
|
||||
return -EPERM;
|
||||
if (cmd == ATM_SETBACKEND) {
|
||||
if (sock->state != SS_CONNECTED)
|
||||
return -EINVAL;
|
||||
return br2684_regvcc(atmvcc, argp);
|
||||
} else {
|
||||
return br2684_create(argp);
|
||||
}
|
||||
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
||||
case BR2684_SETFILT:
|
||||
if (atmvcc->push != br2684_push)
|
||||
return -ENOIOCTLCMD;
|
||||
if (!capable(CAP_NET_ADMIN))
|
||||
return -EPERM;
|
||||
err = br2684_setfilt(atmvcc, argp);
|
||||
|
||||
return err;
|
||||
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
||||
}
|
||||
return -ENOIOCTLCMD;
|
||||
}
|
||||
|
||||
static struct atm_ioctl br2684_ioctl_ops = {
|
||||
.owner = THIS_MODULE,
|
||||
.ioctl = br2684_ioctl,
|
||||
};
|
||||
|
||||
#ifdef CONFIG_PROC_FS
|
||||
static void *br2684_seq_start(struct seq_file *seq, loff_t * pos)
|
||||
__acquires(devs_lock)
|
||||
{
|
||||
read_lock(&devs_lock);
|
||||
return seq_list_start(&br2684_devs, *pos);
|
||||
}
|
||||
|
||||
static void *br2684_seq_next(struct seq_file *seq, void *v, loff_t * pos)
|
||||
{
|
||||
return seq_list_next(v, &br2684_devs, pos);
|
||||
}
|
||||
|
||||
static void br2684_seq_stop(struct seq_file *seq, void *v)
|
||||
__releases(devs_lock)
|
||||
{
|
||||
read_unlock(&devs_lock);
|
||||
}
|
||||
|
||||
static int br2684_seq_show(struct seq_file *seq, void *v)
|
||||
{
|
||||
const struct br2684_dev *brdev = list_entry(v, struct br2684_dev,
|
||||
br2684_devs);
|
||||
const struct net_device *net_dev = brdev->net_dev;
|
||||
const struct br2684_vcc *brvcc;
|
||||
|
||||
seq_printf(seq, "dev %.16s: num=%d, mac=%pM (%s)\n",
|
||||
net_dev->name,
|
||||
brdev->number,
|
||||
net_dev->dev_addr,
|
||||
brdev->mac_was_set ? "set" : "auto");
|
||||
|
||||
list_for_each_entry(brvcc, &brdev->brvccs, brvccs) {
|
||||
seq_printf(seq, " vcc %d.%d.%d: encaps=%s payload=%s"
|
||||
", failed copies %u/%u"
|
||||
"\n", brvcc->atmvcc->dev->number,
|
||||
brvcc->atmvcc->vpi, brvcc->atmvcc->vci,
|
||||
(brvcc->encaps == e_llc) ? "LLC" : "VC",
|
||||
(brdev->payload == p_bridged) ? "bridged" : "routed",
|
||||
brvcc->copies_failed, brvcc->copies_needed);
|
||||
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
||||
#define b1(var, byte) ((u8 *) &brvcc->filter.var)[byte]
|
||||
#define bs(var) b1(var, 0), b1(var, 1), b1(var, 2), b1(var, 3)
|
||||
if (brvcc->filter.netmask != 0)
|
||||
seq_printf(seq, " filter=%d.%d.%d.%d/"
|
||||
"%d.%d.%d.%d\n", bs(prefix), bs(netmask));
|
||||
#undef bs
|
||||
#undef b1
|
||||
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct seq_operations br2684_seq_ops = {
|
||||
.start = br2684_seq_start,
|
||||
.next = br2684_seq_next,
|
||||
.stop = br2684_seq_stop,
|
||||
.show = br2684_seq_show,
|
||||
};
|
||||
|
||||
static int br2684_proc_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
return seq_open(file, &br2684_seq_ops);
|
||||
}
|
||||
|
||||
static const struct file_operations br2684_proc_ops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = br2684_proc_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = seq_release,
|
||||
};
|
||||
|
||||
extern struct proc_dir_entry *atm_proc_root; /* from proc.c */
|
||||
#endif /* CONFIG_PROC_FS */
|
||||
|
||||
static int __init br2684_init(void)
|
||||
{
|
||||
#ifdef CONFIG_PROC_FS
|
||||
struct proc_dir_entry *p;
|
||||
p = proc_create("br2684", 0, atm_proc_root, &br2684_proc_ops);
|
||||
if (p == NULL)
|
||||
return -ENOMEM;
|
||||
#endif
|
||||
register_atm_ioctl(&br2684_ioctl_ops);
|
||||
register_atmdevice_notifier(&atm_dev_notifier);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void __exit br2684_exit(void)
|
||||
{
|
||||
struct net_device *net_dev;
|
||||
struct br2684_dev *brdev;
|
||||
struct br2684_vcc *brvcc;
|
||||
deregister_atm_ioctl(&br2684_ioctl_ops);
|
||||
|
||||
#ifdef CONFIG_PROC_FS
|
||||
remove_proc_entry("br2684", atm_proc_root);
|
||||
#endif
|
||||
|
||||
|
||||
unregister_atmdevice_notifier(&atm_dev_notifier);
|
||||
|
||||
while (!list_empty(&br2684_devs)) {
|
||||
net_dev = list_entry_brdev(br2684_devs.next);
|
||||
brdev = BRPRIV(net_dev);
|
||||
while (!list_empty(&brdev->brvccs)) {
|
||||
brvcc = list_entry_brvcc(brdev->brvccs.next);
|
||||
br2684_close_vcc(brvcc);
|
||||
}
|
||||
|
||||
list_del(&brdev->br2684_devs);
|
||||
unregister_netdev(net_dev);
|
||||
free_netdev(net_dev);
|
||||
}
|
||||
}
|
||||
|
||||
module_init(br2684_init);
|
||||
module_exit(br2684_exit);
|
||||
|
||||
MODULE_AUTHOR("Marcell GAL");
|
||||
MODULE_DESCRIPTION("RFC2684 bridged protocols over ATM/AAL5");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Add table
Add a link
Reference in a new issue