Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
This commit is contained in:
Linus Torvalds
824
net/atm/br2684.c
Normal file
824
net/atm/br2684.c
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@@ -0,0 +1,824 @@
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/*
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Experimental ethernet netdevice using ATM AAL5 as underlying carrier
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(RFC1483 obsoleted by RFC2684) for Linux 2.4
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Author: Marcell GAL, 2000, XDSL Ltd, Hungary
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*/
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#include <linux/module.h>
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#include <linux/config.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 <asm/uaccess.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/seq_file.h>
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#include <linux/atmbr2684.h>
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#include "common.h"
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#include "ipcommon.h"
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/*
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* Define this to use a version of the code which interacts with the higher
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* layers in a more intellegent way, by always reserving enough space for
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* our header at the begining of the packet. However, there may still be
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* some problems with programs like tcpdump. In 2.5 we'll sort out what
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* we need to do to get this perfect. For now we just will copy the packet
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* if we need space for the header
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*/
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/* #define FASTER_VERSION */
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#ifdef DEBUG
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#define DPRINTK(format, args...) printk(KERN_DEBUG "br2684: " format, ##args)
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#else
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#define DPRINTK(format, args...)
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#endif
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#ifdef SKB_DEBUG
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static void skb_debug(const struct sk_buff *skb)
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{
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#define NUM2PRINT 50
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char buf[NUM2PRINT * 3 + 1]; /* 3 chars per byte */
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int i = 0;
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for (i = 0; i < skb->len && i < NUM2PRINT; i++) {
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sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
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}
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printk(KERN_DEBUG "br2684: skb: %s\n", buf);
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}
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#else
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#define skb_debug(skb) do {} while (0)
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#endif
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static unsigned char llc_oui_pid_pad[] =
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{ 0xAA, 0xAA, 0x03, 0x00, 0x80, 0xC2, 0x00, 0x07, 0x00, 0x00 };
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#define PADLEN (2)
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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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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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#ifndef FASTER_VERSION
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unsigned copies_needed, copies_failed;
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#endif /* FASTER_VERSION */
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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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struct net_device_stats stats;
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int mac_was_set;
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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 (struct br2684_dev *) net_dev->priv;
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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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/*
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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 br2684_dev *brdev,
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struct br2684_vcc *brvcc)
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{
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struct atm_vcc *atmvcc;
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#ifdef FASTER_VERSION
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if (brvcc->encaps == e_llc)
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memcpy(skb_push(skb, 8), llc_oui_pid_pad, 8);
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/* last 2 bytes of llc_oui_pid_pad are managed by header routines;
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yes, you got it: 8 + 2 = sizeof(llc_oui_pid_pad)
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*/
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#else
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int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2;
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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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skb_push(skb, minheadroom);
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if (brvcc->encaps == e_llc)
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memcpy(skb->data, llc_oui_pid_pad, 10);
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else
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memset(skb->data, 0, 2);
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#endif /* FASTER_VERSION */
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skb_debug(skb);
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ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc;
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DPRINTK("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev);
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if (!atm_may_send(atmvcc, skb->truesize)) {
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/* we free this here for now, because we cannot know in a higher
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layer whether the skb point it supplied wasn't freed yet.
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now, it always is.
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*/
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dev_kfree_skb(skb);
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return 0;
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}
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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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brdev->stats.tx_packets++;
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brdev->stats.tx_bytes += skb->len;
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atmvcc->send(atmvcc, skb);
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return 1;
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}
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static inline struct br2684_vcc *pick_outgoing_vcc(struct sk_buff *skb,
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struct br2684_dev *brdev)
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{
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return list_empty(&brdev->brvccs) ? NULL :
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list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */
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}
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static int br2684_start_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct br2684_dev *brdev = BRPRIV(dev);
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struct br2684_vcc *brvcc;
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DPRINTK("br2684_start_xmit, skb->dst=%p\n", skb->dst);
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read_lock(&devs_lock);
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brvcc = pick_outgoing_vcc(skb, brdev);
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if (brvcc == NULL) {
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DPRINTK("no vcc attached to dev %s\n", dev->name);
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brdev->stats.tx_errors++;
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brdev->stats.tx_carrier_errors++;
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/* netif_stop_queue(dev); */
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dev_kfree_skb(skb);
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read_unlock(&devs_lock);
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return -EUNATCH;
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}
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if (!br2684_xmit_vcc(skb, brdev, brvcc)) {
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/*
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* We should probably use netif_*_queue() here, but that
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* involves added complication. We need to walk before
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* we can run
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*/
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/* don't free here! this pointer might be no longer valid!
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dev_kfree_skb(skb);
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*/
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brdev->stats.tx_errors++;
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brdev->stats.tx_fifo_errors++;
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}
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read_unlock(&devs_lock);
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return 0;
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}
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static struct net_device_stats *br2684_get_stats(struct net_device *dev)
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{
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DPRINTK("br2684_get_stats\n");
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return &BRPRIV(dev)->stats;
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}
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#ifdef FASTER_VERSION
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/*
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* These mirror eth_header and eth_header_cache. They are not usually
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* exported for use in modules, so we grab them from net_device
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* after ether_setup() is done with it. Bit of a hack.
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*/
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static int (*my_eth_header)(struct sk_buff *, struct net_device *,
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unsigned short, void *, void *, unsigned);
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static int (*my_eth_header_cache)(struct neighbour *, struct hh_cache *);
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static int
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br2684_header(struct sk_buff *skb, struct net_device *dev,
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unsigned short type, void *daddr, void *saddr, unsigned len)
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{
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u16 *pad_before_eth;
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int t = my_eth_header(skb, dev, type, daddr, saddr, len);
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if (t > 0) {
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pad_before_eth = (u16 *) skb_push(skb, 2);
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*pad_before_eth = 0;
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return dev->hard_header_len; /* or return 16; ? */
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} else
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return t;
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}
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static int
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br2684_header_cache(struct neighbour *neigh, struct hh_cache *hh)
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{
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/* hh_data is 16 bytes long. if encaps is ether-llc we need 24, so
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xmit will add the additional header part in that case */
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u16 *pad_before_eth = (u16 *)(hh->hh_data);
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int t = my_eth_header_cache(neigh, hh);
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DPRINTK("br2684_header_cache, neigh=%p, hh_cache=%p\n", neigh, hh);
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if (t < 0)
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return t;
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else {
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*pad_before_eth = 0;
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hh->hh_len = PADLEN + ETH_HLEN;
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}
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return 0;
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}
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/*
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* This is similar to eth_type_trans, which cannot be used because of
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* our dev->hard_header_len
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*/
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static inline unsigned short br_type_trans(struct sk_buff *skb,
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struct net_device *dev)
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{
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struct ethhdr *eth;
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unsigned char *rawp;
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eth = eth_hdr(skb);
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if (*eth->h_dest & 1) {
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if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0)
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skb->pkt_type = PACKET_BROADCAST;
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else
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skb->pkt_type = PACKET_MULTICAST;
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}
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else if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
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skb->pkt_type = PACKET_OTHERHOST;
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if (ntohs(eth->h_proto) >= 1536)
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return eth->h_proto;
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rawp = skb->data;
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/*
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* This is a magic hack to spot IPX packets. Older Novell breaks
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* the protocol design and runs IPX over 802.3 without an 802.2 LLC
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* layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
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* won't work for fault tolerant netware but does for the rest.
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*/
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if (*(unsigned short *) rawp == 0xFFFF)
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return htons(ETH_P_802_3);
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/*
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* Real 802.2 LLC
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*/
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return htons(ETH_P_802_2);
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}
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#endif /* FASTER_VERSION */
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/*
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* We remember when the MAC gets set, so we don't override it later with
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* the ESI of the ATM card of the first VC
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*/
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static int (*my_eth_mac_addr)(struct net_device *, void *);
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static int br2684_mac_addr(struct net_device *dev, void *p)
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{
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int err = my_eth_mac_addr(dev, p);
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if (!err)
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BRPRIV(dev)->mac_was_set = 1;
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return err;
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}
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#ifdef CONFIG_ATM_BR2684_IPFILTER
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/* this IOCTL is experimental. */
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static int br2684_setfilt(struct atm_vcc *atmvcc, void __user *arg)
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{
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struct br2684_vcc *brvcc;
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struct br2684_filter_set fs;
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if (copy_from_user(&fs, arg, sizeof fs))
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return -EFAULT;
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if (fs.ifspec.method != BR2684_FIND_BYNOTHING) {
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/*
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* This is really a per-vcc thing, but we can also search
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* by device
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*/
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struct br2684_dev *brdev;
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read_lock(&devs_lock);
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brdev = BRPRIV(br2684_find_dev(&fs.ifspec));
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if (brdev == NULL || list_empty(&brdev->brvccs) ||
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brdev->brvccs.next != brdev->brvccs.prev) /* >1 VCC */
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brvcc = NULL;
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else
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brvcc = list_entry_brvcc(brdev->brvccs.next);
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read_unlock(&devs_lock);
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if (brvcc == NULL)
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return -ESRCH;
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} else
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brvcc = BR2684_VCC(atmvcc);
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memcpy(&brvcc->filter, &fs.filter, sizeof(brvcc->filter));
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return 0;
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}
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/* Returns 1 if packet should be dropped */
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static inline int
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packet_fails_filter(u16 type, struct br2684_vcc *brvcc, struct sk_buff *skb)
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{
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if (brvcc->filter.netmask == 0)
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return 0; /* no filter in place */
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if (type == __constant_htons(ETH_P_IP) &&
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(((struct iphdr *) (skb->data))->daddr & brvcc->filter.
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netmask) == brvcc->filter.prefix)
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return 0;
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if (type == __constant_htons(ETH_P_ARP))
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return 0;
|
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/* TODO: we should probably filter ARPs too.. don't want to have
|
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* them returning values that don't make sense, or is that ok?
|
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*/
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return 1; /* drop */
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}
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||||
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
||||
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||||
static void br2684_close_vcc(struct br2684_vcc *brvcc)
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||||
{
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DPRINTK("removing VCC %p from dev %p\n", brvcc, brvcc->device);
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write_lock_irq(&devs_lock);
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list_del(&brvcc->brvccs);
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write_unlock_irq(&devs_lock);
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brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */
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||||
brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */
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||||
kfree(brvcc);
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||||
module_put(THIS_MODULE);
|
||||
}
|
||||
|
||||
/* when AAL5 PDU comes in: */
|
||||
static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb)
|
||||
{
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||||
struct br2684_vcc *brvcc = BR2684_VCC(atmvcc);
|
||||
struct net_device *net_dev = brvcc->device;
|
||||
struct br2684_dev *brdev = BRPRIV(net_dev);
|
||||
int plen = sizeof(llc_oui_pid_pad) + ETH_HLEN;
|
||||
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||||
DPRINTK("br2684_push\n");
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||||
if (unlikely(skb == NULL)) {
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||||
/* skb==NULL means VCC is being destroyed */
|
||||
br2684_close_vcc(brvcc);
|
||||
if (list_empty(&brdev->brvccs)) {
|
||||
read_lock(&devs_lock);
|
||||
list_del(&brdev->br2684_devs);
|
||||
read_unlock(&devs_lock);
|
||||
unregister_netdev(net_dev);
|
||||
free_netdev(net_dev);
|
||||
}
|
||||
return;
|
||||
}
|
||||
|
||||
skb_debug(skb);
|
||||
atm_return(atmvcc, skb->truesize);
|
||||
DPRINTK("skb from brdev %p\n", brdev);
|
||||
if (brvcc->encaps == e_llc) {
|
||||
/* 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) */
|
||||
if (memcmp(skb->data, llc_oui_pid_pad, 7)) {
|
||||
brdev->stats.rx_errors++;
|
||||
dev_kfree_skb(skb);
|
||||
return;
|
||||
}
|
||||
|
||||
/* Strip FCS if present */
|
||||
if (skb->len > 7 && skb->data[7] == 0x01)
|
||||
__skb_trim(skb, skb->len - 4);
|
||||
} else {
|
||||
plen = PADLEN + ETH_HLEN; /* pad, dstmac,srcmac, ethtype */
|
||||
/* first 2 chars should be 0 */
|
||||
if (*((u16 *) (skb->data)) != 0) {
|
||||
brdev->stats.rx_errors++;
|
||||
dev_kfree_skb(skb);
|
||||
return;
|
||||
}
|
||||
}
|
||||
if (skb->len < plen) {
|
||||
brdev->stats.rx_errors++;
|
||||
dev_kfree_skb(skb); /* dev_ not needed? */
|
||||
return;
|
||||
}
|
||||
|
||||
#ifdef FASTER_VERSION
|
||||
/* FIXME: tcpdump shows that pointer to mac header is 2 bytes earlier,
|
||||
than should be. What else should I set? */
|
||||
skb_pull(skb, plen);
|
||||
skb->mac.raw = ((char *) (skb->data)) - ETH_HLEN;
|
||||
skb->pkt_type = PACKET_HOST;
|
||||
#ifdef CONFIG_BR2684_FAST_TRANS
|
||||
skb->protocol = ((u16 *) skb->data)[-1];
|
||||
#else /* some protocols might require this: */
|
||||
skb->protocol = br_type_trans(skb, net_dev);
|
||||
#endif /* CONFIG_BR2684_FAST_TRANS */
|
||||
#else
|
||||
skb_pull(skb, plen - ETH_HLEN);
|
||||
skb->protocol = eth_type_trans(skb, net_dev);
|
||||
#endif /* FASTER_VERSION */
|
||||
#ifdef CONFIG_ATM_BR2684_IPFILTER
|
||||
if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb))) {
|
||||
brdev->stats.rx_dropped++;
|
||||
dev_kfree_skb(skb);
|
||||
return;
|
||||
}
|
||||
#endif /* CONFIG_ATM_BR2684_IPFILTER */
|
||||
skb->dev = net_dev;
|
||||
ATM_SKB(skb)->vcc = atmvcc; /* needed ? */
|
||||
DPRINTK("received packet's protocol: %x\n", ntohs(skb->protocol));
|
||||
skb_debug(skb);
|
||||
if (unlikely(!(net_dev->flags & IFF_UP))) {
|
||||
/* sigh, interface is down */
|
||||
brdev->stats.rx_dropped++;
|
||||
dev_kfree_skb(skb);
|
||||
return;
|
||||
}
|
||||
brdev->stats.rx_packets++;
|
||||
brdev->stats.rx_bytes += skb->len;
|
||||
memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
|
||||
netif_rx(skb);
|
||||
}
|
||||
|
||||
static int br2684_regvcc(struct atm_vcc *atmvcc, void __user *arg)
|
||||
{
|
||||
/* assign a vcc to a dev
|
||||
Note: we do not have explicit unassign, but look at _push()
|
||||
*/
|
||||
int err;
|
||||
struct br2684_vcc *brvcc;
|
||||
struct sk_buff_head copy;
|
||||
struct sk_buff *skb;
|
||||
struct br2684_dev *brdev;
|
||||
struct net_device *net_dev;
|
||||
struct atm_backend_br2684 be;
|
||||
|
||||
if (copy_from_user(&be, arg, sizeof be))
|
||||
return -EFAULT;
|
||||
brvcc = kmalloc(sizeof(struct br2684_vcc), GFP_KERNEL);
|
||||
if (!brvcc)
|
||||
return -ENOMEM;
|
||||
memset(brvcc, 0, sizeof(struct br2684_vcc));
|
||||
write_lock_irq(&devs_lock);
|
||||
net_dev = br2684_find_dev(&be.ifspec);
|
||||
if (net_dev == NULL) {
|
||||
printk(KERN_ERR
|
||||
"br2684: tried to attach to non-existant 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;
|
||||
}
|
||||
DPRINTK("br2684_regvcc 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;
|
||||
barrier();
|
||||
atmvcc->push = br2684_push;
|
||||
skb_queue_head_init(©);
|
||||
skb_migrate(&sk_atm(atmvcc)->sk_receive_queue, ©);
|
||||
while ((skb = skb_dequeue(©)) != NULL) {
|
||||
BRPRIV(skb->dev)->stats.rx_bytes -= skb->len;
|
||||
BRPRIV(skb->dev)->stats.rx_packets--;
|
||||
br2684_push(atmvcc, skb);
|
||||
}
|
||||
__module_get(THIS_MODULE);
|
||||
return 0;
|
||||
error:
|
||||
write_unlock_irq(&devs_lock);
|
||||
kfree(brvcc);
|
||||
return err;
|
||||
}
|
||||
|
||||
static void br2684_setup(struct net_device *netdev)
|
||||
{
|
||||
struct br2684_dev *brdev = BRPRIV(netdev);
|
||||
|
||||
ether_setup(netdev);
|
||||
brdev->net_dev = netdev;
|
||||
|
||||
#ifdef FASTER_VERSION
|
||||
my_eth_header = netdev->hard_header;
|
||||
netdev->hard_header = br2684_header;
|
||||
my_eth_header_cache = netdev->hard_header_cache;
|
||||
netdev->hard_header_cache = br2684_header_cache;
|
||||
netdev->hard_header_len = sizeof(llc_oui_pid_pad) + ETH_HLEN; /* 10 + 14 */
|
||||
#endif
|
||||
my_eth_mac_addr = netdev->set_mac_address;
|
||||
netdev->set_mac_address = br2684_mac_addr;
|
||||
netdev->hard_start_xmit = br2684_start_xmit;
|
||||
netdev->get_stats = br2684_get_stats;
|
||||
|
||||
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;
|
||||
|
||||
DPRINTK("br2684_create\n");
|
||||
|
||||
if (copy_from_user(&ni, arg, sizeof ni)) {
|
||||
return -EFAULT;
|
||||
}
|
||||
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",
|
||||
br2684_setup);
|
||||
if (!netdev)
|
||||
return -ENOMEM;
|
||||
|
||||
brdev = BRPRIV(netdev);
|
||||
|
||||
DPRINTK("registered netdev %s\n", netdev->name);
|
||||
/* open, stop, do_ioctl ? */
|
||||
err = register_netdev(netdev);
|
||||
if (err < 0) {
|
||||
printk(KERN_ERR "br2684_create: register_netdev failed\n");
|
||||
free_netdev(netdev);
|
||||
return err;
|
||||
}
|
||||
|
||||
write_lock_irq(&devs_lock);
|
||||
brdev->number = list_empty(&br2684_devs) ? 1 :
|
||||
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;
|
||||
|
||||
int err;
|
||||
switch(cmd) {
|
||||
case ATM_SETBACKEND:
|
||||
case ATM_NEWBACKENDIF: {
|
||||
atm_backend_t b;
|
||||
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)
|
||||
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)
|
||||
{
|
||||
loff_t offs = 0;
|
||||
struct br2684_dev *brd;
|
||||
|
||||
read_lock(&devs_lock);
|
||||
|
||||
list_for_each_entry(brd, &br2684_devs, br2684_devs) {
|
||||
if (offs == *pos)
|
||||
return brd;
|
||||
++offs;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void *br2684_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
||||
{
|
||||
struct br2684_dev *brd = v;
|
||||
|
||||
++*pos;
|
||||
|
||||
brd = list_entry(brd->br2684_devs.next,
|
||||
struct br2684_dev, br2684_devs);
|
||||
return (&brd->br2684_devs != &br2684_devs) ? brd : NULL;
|
||||
}
|
||||
|
||||
static void br2684_seq_stop(struct seq_file *seq, void *v)
|
||||
{
|
||||
read_unlock(&devs_lock);
|
||||
}
|
||||
|
||||
static int br2684_seq_show(struct seq_file *seq, void *v)
|
||||
{
|
||||
const struct br2684_dev *brdev = v;
|
||||
const struct net_device *net_dev = brdev->net_dev;
|
||||
const struct br2684_vcc *brvcc;
|
||||
|
||||
seq_printf(seq, "dev %.16s: num=%d, mac=%02X:%02X:"
|
||||
"%02X:%02X:%02X:%02X (%s)\n", net_dev->name,
|
||||
brdev->number,
|
||||
net_dev->dev_addr[0],
|
||||
net_dev->dev_addr[1],
|
||||
net_dev->dev_addr[2],
|
||||
net_dev->dev_addr[3],
|
||||
net_dev->dev_addr[4],
|
||||
net_dev->dev_addr[5],
|
||||
brdev->mac_was_set ? "set" : "auto");
|
||||
|
||||
list_for_each_entry(brvcc, &brdev->brvccs, brvccs) {
|
||||
seq_printf(seq, " vcc %d.%d.%d: encaps=%s"
|
||||
#ifndef FASTER_VERSION
|
||||
", failed copies %u/%u"
|
||||
#endif /* FASTER_VERSION */
|
||||
"\n", brvcc->atmvcc->dev->number,
|
||||
brvcc->atmvcc->vpi, brvcc->atmvcc->vci,
|
||||
(brvcc->encaps == e_llc) ? "LLC" : "VC"
|
||||
#ifndef FASTER_VERSION
|
||||
, brvcc->copies_failed
|
||||
, brvcc->copies_needed
|
||||
#endif /* FASTER_VERSION */
|
||||
);
|
||||
#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 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 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
|
||||
|
||||
static int __init br2684_init(void)
|
||||
{
|
||||
#ifdef CONFIG_PROC_FS
|
||||
struct proc_dir_entry *p;
|
||||
if ((p = create_proc_entry("br2684", 0, atm_proc_root)) == NULL)
|
||||
return -ENOMEM;
|
||||
p->proc_fops = &br2684_proc_ops;
|
||||
#endif
|
||||
register_atm_ioctl(&br2684_ioctl_ops);
|
||||
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
|
||||
|
||||
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");
|
||||
Reference in New Issue
Block a user