diff options
Diffstat (limited to 'net/atm/br2684.c')
| -rw-r--r-- | net/atm/br2684.c | 824 |
1 files changed, 824 insertions, 0 deletions
diff --git a/net/atm/br2684.c b/net/atm/br2684.c new file mode 100644 index 0000000..e6954cf --- /dev/null +++ b/net/atm/br2684.c @@ -0,0 +1,824 @@ +/* +Experimental ethernet netdevice using ATM AAL5 as underlying carrier +(RFC1483 obsoleted by RFC2684) for Linux 2.4 +Author: Marcell GAL, 2000, XDSL Ltd, Hungary +*/ + +#include <linux/module.h> +#include <linux/config.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/netdevice.h> +#include <linux/skbuff.h> +#include <linux/etherdevice.h> +#include <linux/rtnetlink.h> +#include <linux/ip.h> +#include <asm/uaccess.h> +#include <net/arp.h> +#include <linux/atm.h> +#include <linux/atmdev.h> +#include <linux/seq_file.h> + +#include <linux/atmbr2684.h> + +#include "common.h" +#include "ipcommon.h" + +/* + * Define this to use a version of the code which interacts with the higher + * layers in a more intellegent way, by always reserving enough space for + * our header at the begining of the packet. However, there may still be + * some problems with programs like tcpdump. In 2.5 we'll sort out what + * we need to do to get this perfect. For now we just will copy the packet + * if we need space for the header + */ +/* #define FASTER_VERSION */ + +#ifdef DEBUG +#define DPRINTK(format, args...) printk(KERN_DEBUG "br2684: " format, ##args) +#else +#define DPRINTK(format, args...) +#endif + +#ifdef SKB_DEBUG +static void skb_debug(const struct sk_buff *skb) +{ +#define NUM2PRINT 50 + char buf[NUM2PRINT * 3 + 1]; /* 3 chars per byte */ + int i = 0; + for (i = 0; i < skb->len && i < NUM2PRINT; i++) { + sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); + } + printk(KERN_DEBUG "br2684: skb: %s\n", buf); +} +#else +#define skb_debug(skb) do {} while (0) +#endif + +static unsigned char llc_oui_pid_pad[] = + { 0xAA, 0xAA, 0x03, 0x00, 0x80, 0xC2, 0x00, 0x07, 0x00, 0x00 }; +#define PADLEN (2) + +enum br2684_encaps { + e_vc = BR2684_ENCAPS_VC, + e_llc = BR2684_ENCAPS_LLC, +}; + +struct br2684_vcc { + struct atm_vcc *atmvcc; + struct net_device *device; + /* keep old push,pop functions for chaining */ + void (*old_push)(struct atm_vcc *vcc,struct sk_buff *skb); + /* void (*old_pop)(struct atm_vcc *vcc,struct sk_buff *skb); */ + enum br2684_encaps encaps; + struct list_head brvccs; +#ifdef CONFIG_ATM_BR2684_IPFILTER + struct br2684_filter filter; +#endif /* CONFIG_ATM_BR2684_IPFILTER */ +#ifndef FASTER_VERSION + unsigned copies_needed, copies_failed; +#endif /* FASTER_VERSION */ +}; + +struct br2684_dev { + struct net_device *net_dev; + struct list_head br2684_devs; + int number; + struct list_head brvccs; /* one device <=> one vcc (before xmas) */ + struct net_device_stats stats; + int mac_was_set; +}; + +/* + * This lock should be held for writing any time the list of devices or + * their attached vcc's could be altered. It should be held for reading + * any time these are being queried. Note that we sometimes need to + * do read-locking under interrupt context, so write locking must block + * the current CPU's interrupts + */ +static DEFINE_RWLOCK(devs_lock); + +static LIST_HEAD(br2684_devs); + +static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev) +{ + return (struct br2684_dev *) net_dev->priv; +} + +static inline struct net_device *list_entry_brdev(const struct list_head *le) +{ + return list_entry(le, struct br2684_dev, br2684_devs)->net_dev; +} + +static inline struct br2684_vcc *BR2684_VCC(const struct atm_vcc *atmvcc) +{ + return (struct br2684_vcc *) (atmvcc->user_back); +} + +static inline struct br2684_vcc *list_entry_brvcc(const struct list_head *le) +{ + return list_entry(le, struct br2684_vcc, brvccs); +} + +/* Caller should hold read_lock(&devs_lock) */ +static struct net_device *br2684_find_dev(const struct br2684_if_spec *s) +{ + struct list_head *lh; + struct net_device *net_dev; + switch (s->method) { + case BR2684_FIND_BYNUM: + list_for_each(lh, &br2684_devs) { + net_dev = list_entry_brdev(lh); + if (BRPRIV(net_dev)->number == s->spec.devnum) + return net_dev; + } + break; + case BR2684_FIND_BYIFNAME: + list_for_each(lh, &br2684_devs) { + net_dev = list_entry_brdev(lh); + if (!strncmp(net_dev->name, s->spec.ifname, IFNAMSIZ)) + return net_dev; + } + break; + } + return NULL; +} + +/* + * Send a packet out a particular vcc. Not to useful right now, but paves + * the way for multiple vcc's per itf. Returns true if we can send, + * otherwise false + */ +static int br2684_xmit_vcc(struct sk_buff *skb, struct br2684_dev *brdev, + struct br2684_vcc *brvcc) +{ + struct atm_vcc *atmvcc; +#ifdef FASTER_VERSION + if (brvcc->encaps == e_llc) + memcpy(skb_push(skb, 8), llc_oui_pid_pad, 8); + /* last 2 bytes of llc_oui_pid_pad are managed by header routines; + yes, you got it: 8 + 2 = sizeof(llc_oui_pid_pad) + */ +#else + int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2; + if (skb_headroom(skb) < minheadroom) { + struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom); + brvcc->copies_needed++; + dev_kfree_skb(skb); + if (skb2 == NULL) { + brvcc->copies_failed++; + return 0; + } + skb = skb2; + } + skb_push(skb, minheadroom); + if (brvcc->encaps == e_llc) + memcpy(skb->data, llc_oui_pid_pad, 10); + else + memset(skb->data, 0, 2); +#endif /* FASTER_VERSION */ + skb_debug(skb); + + ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc; + DPRINTK("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev); + if (!atm_may_send(atmvcc, skb->truesize)) { + /* we free this here for now, because we cannot know in a higher + layer whether the skb point it supplied wasn't freed yet. + now, it always is. + */ + dev_kfree_skb(skb); + return 0; + } + atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc); + ATM_SKB(skb)->atm_options = atmvcc->atm_options; + brdev->stats.tx_packets++; + brdev->stats.tx_bytes += skb->len; + atmvcc->send(atmvcc, skb); + return 1; +} + +static inline struct br2684_vcc *pick_outgoing_vcc(struct sk_buff *skb, + struct br2684_dev *brdev) +{ + return list_empty(&brdev->brvccs) ? NULL : + list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */ +} + +static int br2684_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct br2684_dev *brdev = BRPRIV(dev); + struct br2684_vcc *brvcc; + + DPRINTK("br2684_start_xmit, skb->dst=%p\n", skb->dst); + read_lock(&devs_lock); + brvcc = pick_outgoing_vcc(skb, brdev); + if (brvcc == NULL) { + DPRINTK("no vcc attached to dev %s\n", dev->name); + brdev->stats.tx_errors++; + brdev->stats.tx_carrier_errors++; + /* netif_stop_queue(dev); */ + dev_kfree_skb(skb); + read_unlock(&devs_lock); + return -EUNATCH; + } + if (!br2684_xmit_vcc(skb, brdev, 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_kfree_skb(skb); + */ + brdev->stats.tx_errors++; + brdev->stats.tx_fifo_errors++; + } + read_unlock(&devs_lock); + return 0; +} + +static struct net_device_stats *br2684_get_stats(struct net_device *dev) +{ + DPRINTK("br2684_get_stats\n"); + return &BRPRIV(dev)->stats; +} + +#ifdef FASTER_VERSION +/* + * These mirror eth_header and eth_header_cache. They are not usually + * exported for use in modules, so we grab them from net_device + * after ether_setup() is done with it. Bit of a hack. + */ +static int (*my_eth_header)(struct sk_buff *, struct net_device *, + unsigned short, void *, void *, unsigned); +static int (*my_eth_header_cache)(struct neighbour *, struct hh_cache *); + +static int +br2684_header(struct sk_buff *skb, struct net_device *dev, + unsigned short type, void *daddr, void *saddr, unsigned len) +{ + u16 *pad_before_eth; + int t = my_eth_header(skb, dev, type, daddr, saddr, len); + if (t > 0) { + pad_before_eth = (u16 *) skb_push(skb, 2); + *pad_before_eth = 0; + return dev->hard_header_len; /* or return 16; ? */ + } else + return t; +} + +static int +br2684_header_cache(struct neighbour *neigh, struct hh_cache *hh) +{ +/* hh_data is 16 bytes long. if encaps is ether-llc we need 24, so +xmit will add the additional header part in that case */ + u16 *pad_before_eth = (u16 *)(hh->hh_data); + int t = my_eth_header_cache(neigh, hh); + DPRINTK("br2684_header_cache, neigh=%p, hh_cache=%p\n", neigh, hh); + if (t < 0) + return t; + else { + *pad_before_eth = 0; + hh->hh_len = PADLEN + ETH_HLEN; + } + return 0; +} + +/* + * This is similar to eth_type_trans, which cannot be used because of + * our dev->hard_header_len + */ +static inline unsigned short br_type_trans(struct sk_buff *skb, + struct net_device *dev) +{ + struct ethhdr *eth; + unsigned char *rawp; + eth = eth_hdr(skb); + + if (*eth->h_dest & 1) { + if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0) + skb->pkt_type = PACKET_BROADCAST; + else + skb->pkt_type = PACKET_MULTICAST; + } + + else if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN)) + skb->pkt_type = PACKET_OTHERHOST; + + if (ntohs(eth->h_proto) >= 1536) + return eth->h_proto; + + rawp = skb->data; + + /* + * This is a magic hack to spot IPX packets. Older Novell breaks + * the protocol design and runs IPX over 802.3 without an 802.2 LLC + * layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This + * won't work for fault tolerant netware but does for the rest. + */ + if (*(unsigned short *) rawp == 0xFFFF) + return htons(ETH_P_802_3); + + /* + * Real 802.2 LLC + */ + return htons(ETH_P_802_2); +} +#endif /* FASTER_VERSION */ + +/* + * 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 (*my_eth_mac_addr)(struct net_device *, void *); +static int br2684_mac_addr(struct net_device *dev, void *p) +{ + int err = my_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(u16 type, struct br2684_vcc *brvcc, struct sk_buff *skb) +{ + if (brvcc->filter.netmask == 0) + return 0; /* no filter in place */ + if (type == __constant_htons(ETH_P_IP) && + (((struct iphdr *) (skb->data))->daddr & brvcc->filter. + netmask) == brvcc->filter.prefix) + return 0; + if (type == __constant_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) +{ + DPRINTK("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->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */ + kfree(brvcc); + module_put(THIS_MODULE); +} + +/* 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); + int plen = sizeof(llc_oui_pid_pad) + ETH_HLEN; + + DPRINTK("br2684_push\n"); + + if (unlikely(skb == NULL)) { + /* 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"); |
