diff -urN /opt/kernel/linux/Documentation/Configure.help linux/Documentation/Configure.help --- /opt/kernel/linux/Documentation/Configure.help Wed Mar 20 20:10:53 2002 +++ linux/Documentation/Configure.help Wed Mar 20 20:36:07 2002 @@ -6113,6 +6113,19 @@ briefly removed during revalidation. If you say Y here, packets to such neighbours are silently discarded instead. +RFC1483/2684 Bridged protocols +CONFIG_ATM_BR2684 + ATM PVCs can carry ethernet PDUs according to rfc2684 (formerly 1483) + This device will act like an ethernet from the kernels point of view, + with the traffic being carried by ATM PVCs (currently 1 PVC/device). + This is sometimes used over DSL lines. If in doubt, say N. + +Per-VC IP filter kludge +CONFIG_ATM_BR2684_IPFILTER + This is an experimental mechanism for users who need to terminating a + large number of IP-only vcc's. Do not enable this unless you are sure + you know what you are doing. + LAN Emulation (LANE) support CONFIG_ATM_LANE LAN Emulation emulates services of existing LANs across an ATM diff -urN /opt/kernel/linux/arch/sparc/config.in linux/arch/sparc/config.in --- /opt/kernel/linux/arch/sparc/config.in Mon Jun 11 19:15:27 2001 +++ linux/arch/sparc/config.in Wed Mar 20 20:36:07 2002 @@ -211,6 +211,12 @@ dep_tristate ' PPP support for sync tty ports' CONFIG_PPP_SYNC_TTY $CONFIG_PPP dep_tristate ' PPP Deflate compression' CONFIG_PPP_DEFLATE $CONFIG_PPP dep_tristate ' PPP BSD-Compress compression' CONFIG_PPP_BSDCOMP m + if [ "$CONFIG_EXPERIMENTAL" = "y" ]; then + dep_tristate ' PPP over Ethernet (EXPERIMENTAL)' CONFIG_PPPOE $CONFIG_PPP + if [ "$CONFIG_ATM" = "y" ]; then + dep_tristate ' PPP over ATM (EXPERIMENTAL)' CONFIG_PPPOATM $CONFIG_PPP + fi + fi fi tristate ' SLIP (serial line) support' CONFIG_SLIP if [ "$CONFIG_SLIP" != "n" ]; then diff -urN /opt/kernel/linux/include/linux/atmbr2684.h linux/include/linux/atmbr2684.h --- /opt/kernel/linux/include/linux/atmbr2684.h Wed Dec 31 16:00:00 1969 +++ linux/include/linux/atmbr2684.h Wed Mar 20 20:39:26 2002 @@ -0,0 +1,101 @@ +#ifndef _LINUX_ATMBR2684_H +#define _LINUX_ATMBR2684_H + +#include +#include /* For IFNAMSIZ */ + +/* + * Type of media we're bridging (ethernet, token ring, etc) Currently only + * ethernet is supported + */ +#define BR2684_MEDIA_ETHERNET (0) /* 802.3 */ +#define BR2684_MEDIA_802_4 (1) /* 802.4 */ +#define BR2684_MEDIA_TR (2) /* 802.5 - token ring */ +#define BR2684_MEDIA_FDDI (3) +#define BR2684_MEDIA_802_6 (4) /* 802.6 */ + +/* + * Is there FCS inbound on this VC? This currently isn't supported. + */ +#define BR2684_FCSIN_NO (0) +#define BR2684_FCSIN_IGNORE (1) +#define BR2684_FCSIN_VERIFY (2) + +/* + * Is there FCS outbound on this VC? This currently isn't supported. + */ +#define BR2684_FCSOUT_NO (0) +#define BR2684_FCSOUT_SENDZERO (1) +#define BR2684_FCSOUT_GENERATE (2) + +/* + * Does this VC include LLC encapsulation? + */ +#define BR2684_ENCAPS_VC (0) /* VC-mux */ +#define BR2684_ENCAPS_LLC (1) +#define BR2684_ENCAPS_AUTODETECT (2) /* Unsuported */ + +/* + * This is for the ATM_NEWBACKENDIF call - these are like socket families: + * the first element of the structure is the backend number and the rest + * is per-backend specific + */ +struct atm_newif_br2684 { + atm_backend_t backend_num; /* ATM_BACKEND_BR2684 */ + int media; /* BR2684_MEDIA_* */ + char ifname[IFNAMSIZ]; + int mtu; +}; + +/* + * This structure is used to specify a br2684 interface - either by a + * positive integer (returned by ATM_NEWBACKENDIF) or the interfaces name + */ +#define BR2684_FIND_BYNOTHING (0) +#define BR2684_FIND_BYNUM (1) +#define BR2684_FIND_BYIFNAME (2) +struct br2684_if_spec { + int method; /* BR2684_FIND_* */ + union { + char ifname[IFNAMSIZ]; + int devnum; + } spec; +}; + +/* + * This is for the ATM_SETBACKEND call - these are like socket families: + * the first element of the structure is the backend number and the rest + * is per-backend specific + */ +struct atm_backend_br2684 { + atm_backend_t backend_num; /* ATM_BACKEND_BR2684 */ + struct br2684_if_spec ifspec; + int fcs_in; /* BR2684_FCSIN_* */ + int fcs_out; /* BR2684_FCSOUT_* */ + int fcs_auto; /* 1: fcs_{in,out} disabled if no FCS rx'ed */ + int encaps; /* BR2684_ENCAPS_* */ + int has_vpiid; /* 1: use vpn_id - Unsupported */ + __u8 vpn_id[7]; + int send_padding; /* unsupported */ + int min_size; /* we will pad smaller packets than this */ +}; + +/* + * The BR2684_SETFILT ioctl is an experimental mechanism for folks + * terminating a large number of IP-only vcc's. When netfilter allows + * efficient per-if in/out filters, this support will be removed + */ +struct br2684_filter { + __u32 prefix; /* network byte order */ + __u32 netmask; /* 0 = disable filter */ +}; + +struct br2684_filter_set { + struct br2684_if_spec ifspec; + struct br2684_filter filter; +}; + +#define BR2684_SETFILT _IOW( 'a', ATMIOC_BACKEND + 0, \ + struct br2684_filter_set) + +#endif /* _LINUX_ATMBR2684_H */ diff -urN /opt/kernel/linux/include/linux/atmdev.h linux/include/linux/atmdev.h --- /opt/kernel/linux/include/linux/atmdev.h Mon Jan 7 15:41:52 2002 +++ linux/include/linux/atmdev.h Wed Mar 20 20:59:17 2002 @@ -95,6 +95,8 @@ /* enable or disable single-copy */ #define ATM_SETBACKEND _IOW('a',ATMIOC_SPECIAL+2,atm_backend_t) /* set backend handler */ +#define ATM_NEWBACKENDIF _IOW('a',ATMIOC_SPECIAL+3,atm_backend_t) + /* use backend to make new if */ /* * These are backend handkers that can be set via the ATM_SETBACKEND call @@ -103,7 +105,7 @@ */ #define ATM_BACKEND_RAW 0 #define ATM_BACKEND_PPP 1 /* PPPoATM - RFC2364 */ -#define ATM_BACKEND_BR_2684 2 /* Bridged RFC1483/2684 */ +#define ATM_BACKEND_BR2684 2 /* Bridged RFC1483/2684 */ /* for ATM_GETTYPE */ #define ATM_ITFTYP_LEN 8 /* maximum length of interface type name */ diff -urN /opt/kernel/linux/net/Config.in linux/net/Config.in --- /opt/kernel/linux/net/Config.in Wed Mar 20 20:10:57 2002 +++ linux/net/Config.in Wed Mar 20 20:36:07 2002 @@ -43,6 +43,10 @@ if [ "$CONFIG_INET" = "y" -a "$CONFIG_ATM_LANE" != "n" ]; then tristate ' Multi-Protocol Over ATM (MPOA) support' CONFIG_ATM_MPOA fi + tristate ' RFC1483/2684 Bridged protocols' CONFIG_ATM_BR2684 + if [ "$CONFIG_ATM_BR2684" != "n" ]; then + bool ' Per-VC IP filter kludge' CONFIG_ATM_BR2684_IPFILTER + fi fi fi tristate '802.1Q VLAN Support' CONFIG_VLAN_8021Q diff -urN /opt/kernel/linux/net/atm/Makefile linux/net/atm/Makefile --- /opt/kernel/linux/net/atm/Makefile Mon Jan 7 15:41:52 2002 +++ linux/net/atm/Makefile Wed Mar 20 20:36:07 2002 @@ -21,6 +21,15 @@ NEED_IPCOM = ipcommon.o endif +ifeq ($(CONFIG_ATM_BR2684),y) + NEED_IPCOM = ipcommon.o +else + ifeq ($(CONFIG_ATM_BR2684),m) + NEED_IPCOM = ipcommon.o + endif +endif +obj-$(CONFIG_ATM_BR2684) += br2684.o + ifeq ($(CONFIG_NET_SCH_ATM),y) NEED_IPCOM = ipcommon.o endif diff -urN /opt/kernel/linux/net/atm/br2684.c linux/net/atm/br2684.c --- /opt/kernel/linux/net/atm/br2684.c Wed Dec 31 16:00:00 1969 +++ linux/net/atm/br2684.c Wed Mar 20 20:36:07 2002 @@ -0,0 +1,795 @@ +/* +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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#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 br2684_dev *brdev; + /* 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 rwlock_t devs_lock = RW_LOCK_UNLOCKED; + +static LIST_HEAD(br2684_devs); + +static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev) +{ + return (struct br2684_dev *) ((char *) (net_dev) - + (unsigned long) (&((struct br2684_dev *) 0)->net_dev)); +} + +static inline struct br2684_dev *list_entry_brdev(const struct list_head *le) +{ + return list_entry(le, struct br2684_dev, br2684_devs); +} + +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 br2684_dev *br2684_find_dev(const struct br2684_if_spec *s) +{ + struct list_head *lh; + struct br2684_dev *brdev; + switch (s->method) { + case BR2684_FIND_BYNUM: + list_for_each(lh, &br2684_devs) { + brdev = list_entry_brdev(lh); + if (brdev->number == s->spec.devnum) + return brdev; + } + break; + case BR2684_FIND_BYIFNAME: + list_for_each(lh, &br2684_devs) { + brdev = list_entry_brdev(lh); + if (!strncmp(brdev->net_dev.name, s->spec.ifname, + sizeof brdev->net_dev.name)) + return brdev; + } + 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, &atmvcc->tx_inuse); + ATM_SKB(skb)->iovcnt = 0; + 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 = skb->mac.ethernet; + + 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, unsigned long arg) +{ + struct br2684_vcc *brvcc; + struct br2684_filter_set fs; + + if (copy_from_user(&fs, (void *) 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 = 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->brdev); + 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); + MOD_DEC_USE_COUNT; +} + +/* 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 br2684_dev *brdev = brvcc->brdev; + int plen = sizeof(llc_oui_pid_pad) + ETH_HLEN; + + DPRINTK("br2684_push\n"); + + if (skb == NULL) { /* skb==NULL means VCC is being destroyed */ + br2684_close_vcc(brvcc); + 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; + } + } 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, &brdev->net_dev); +#endif /* CONFIG_BR2684_FAST_TRANS */ +#else + skb_pull(skb, plen - ETH_HLEN); + skb->protocol = eth_type_trans(skb, &brdev->net_dev); +#endif /* FASTER_VERSION */ +#ifdef CONFIG_ATM_BR2684_IPFILTER + if (packet_fails_filter(skb->protocol, brvcc, skb)) { + brdev->stats.rx_dropped++; + dev_kfree_skb(skb); + return; + } +#endif /* CONFIG_ATM_BR2684_IPFILTER */ + skb->dev = &brdev->net_dev; + ATM_SKB(skb)->vcc = atmvcc; /* needed ? */ + DPRINTK("received packet's protocol: %x\n", ntohs(skb->protocol)); + skb_debug(skb); + if (!(brdev->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; + netif_rx(skb); +} + +static int br2684_regvcc(struct atm_vcc *atmvcc, unsigned long 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 atm_backend_br2684 be; + + MOD_INC_USE_COUNT; + if (copy_from_user(&be, (void *) arg, sizeof be)) { + MOD_DEC_USE_COUNT; + return -EFAULT; + } + write_lock_irq(&devs_lock); + brdev = br2684_find_dev(&be.ifspec); + if (brdev == NULL) { + printk(KERN_ERR + "br2684: tried to attach to non-existant device\n"); + err = -ENXIO; + goto error; + } + 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; + } + brvcc = kmalloc(sizeof(struct br2684_vcc), GFP_KERNEL); + if (!brvcc) { + err = -ENOMEM; + goto error; + } + memset(brvcc, 0, sizeof(struct br2684_vcc)); + 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(brdev->net_dev.dev_addr, esi, + brdev->net_dev.addr_len); + else + brdev->net_dev.dev_addr[2] = 1; + } + list_add(&brvcc->brvccs, &brdev->brvccs); + write_unlock_irq(&devs_lock); + brvcc->brdev = brdev; + 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(&atmvcc->recvq, ©); + while ((skb = skb_dequeue(©))) { + BRPRIV(skb->dev)->stats.rx_bytes -= skb->len; + BRPRIV(skb->dev)->stats.rx_packets--; + br2684_push(atmvcc, skb); + } + return 0; + error: + write_unlock_irq(&devs_lock); + MOD_DEC_USE_COUNT; + return err; +} + +static int br2684_create(unsigned long arg) +{ + int err; + struct br2684_dev *brdev; + struct atm_newif_br2684 ni; + + DPRINTK("br2684_create\n"); + /* + * We track module use by vcc's NOT the devices they're on. We're + * protected here against module death by the kernel_lock, but if + * we need to sleep we should make sure that the module doesn't + * disappear under us. + */ + MOD_INC_USE_COUNT; + if (copy_from_user(&ni, (void *) arg, sizeof ni)) { + MOD_DEC_USE_COUNT; + return -EFAULT; + } + if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500) { + MOD_DEC_USE_COUNT; + return -EINVAL; + } + if ((brdev = kmalloc(sizeof(struct br2684_dev), GFP_KERNEL)) == NULL) { + MOD_DEC_USE_COUNT; + return -ENOMEM; + } + memset(brdev, 0, sizeof(struct br2684_dev)); + INIT_LIST_HEAD(&brdev->brvccs); + + write_lock_irq(&devs_lock); + brdev->number = list_empty(&br2684_devs) ? 1 : + list_entry_brdev(br2684_devs.prev)->number + 1; + list_add_tail(&brdev->br2684_devs, &br2684_devs); + write_unlock_irq(&devs_lock); + + if (ni.ifname[0] != '\0') { + memcpy(brdev->net_dev.name, ni.ifname, + sizeof(brdev->net_dev.name)); + brdev->net_dev.name[sizeof(brdev->net_dev.name) - 1] = '\0'; + } else + sprintf(brdev->net_dev.name, "nas%d", brdev->number); + DPRINTK("registered netdev %s\n", brdev->net_dev.name); + ether_setup(&brdev->net_dev); + brdev->mac_was_set = 0; +#ifdef FASTER_VERSION + my_eth_header = brdev->net_dev.hard_header; + brdev->net_dev.hard_header = br2684_header; + my_eth_header_cache = brdev->net_dev.hard_header_cache; + brdev->net_dev.hard_header_cache = br2684_header_cache; + brdev->net_dev.hard_header_len = sizeof(llc_oui_pid_pad) + ETH_HLEN; /* 10 + 14 */ +#endif + my_eth_mac_addr = brdev->net_dev.set_mac_address; + brdev->net_dev.set_mac_address = br2684_mac_addr; + brdev->net_dev.hard_start_xmit = br2684_start_xmit; + brdev->net_dev.get_stats = br2684_get_stats; + + /* open, stop, do_ioctl ? */ + err = register_netdev(&brdev->net_dev); + MOD_DEC_USE_COUNT; + if (err < 0) { + printk(KERN_ERR "br2684_create: register_netdev failed\n"); + write_lock_irq(&devs_lock); + list_del(&brdev->br2684_devs); + write_unlock_irq(&devs_lock); + kfree(brdev); + return err; + } + return 0; +} + +/* + * This handles ioctls actually performed on our vcc - we must return + * -ENOIOCTLCMD for any unrecognized ioctl + */ +static int br2684_ioctl(struct atm_vcc *atmvcc, unsigned int cmd, + unsigned long arg) +{ + int err; + switch(cmd) { + case ATM_SETBACKEND: + case ATM_NEWBACKENDIF: { + atm_backend_t b; + MOD_INC_USE_COUNT; + err = get_user(b, (atm_backend_t *) arg); + MOD_DEC_USE_COUNT; + 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, arg); + else + return br2684_create(arg); + } +#ifdef CONFIG_ATM_BR2684_IPFILTER + case BR2684_SETFILT: + if (atmvcc->push != br2684_push) + return -ENOIOCTLCMD; + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + MOD_INC_USE_COUNT; + err = br2684_setfilt(atmvcc, arg); + MOD_DEC_USE_COUNT; + return err; +#endif /* CONFIG_ATM_BR2684_IPFILTER */ + } + return -ENOIOCTLCMD; +} + +/* Never put more than 256 bytes in at once */ +static int br2684_proc_engine(loff_t pos, char *buf) +{ + struct list_head *lhd, *lhc; + struct br2684_dev *brdev; + struct br2684_vcc *brvcc; + list_for_each(lhd, &br2684_devs) { + brdev = list_entry_brdev(lhd); + if (pos-- == 0) + return sprintf(buf, "dev %.16s: num=%d, mac=%02X:%02X:" + "%02X:%02X:%02X:%02X (%s)\n", brdev->net_dev.name, + brdev->number, + brdev->net_dev.dev_addr[0], + brdev->net_dev.dev_addr[1], + brdev->net_dev.dev_addr[2], + brdev->net_dev.dev_addr[3], + brdev->net_dev.dev_addr[4], + brdev->net_dev.dev_addr[5], + brdev->mac_was_set ? "set" : "auto"); + list_for_each(lhc, &brdev->brvccs) { + brvcc = list_entry_brvcc(lhc); + if (pos-- == 0) + return sprintf(buf, " 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 && pos-- == 0) + return sprintf(buf, " 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 ssize_t br2684_proc_read(struct file *file, char *buf, size_t count, + loff_t *pos) +{ + unsigned long page; + int len = 0, x, left; + page = get_free_page(GFP_KERNEL); + if (!page) + return -ENOMEM; + left = PAGE_SIZE - 256; + if (count < left) + left = count; + read_lock(&devs_lock); + for (;;) { + x = br2684_proc_engine(*pos, &((char *) page)[len]); + if (x == 0) + break; + if (x > left) + /* + * This should only happen if the user passed in + * a "count" too small for even one line + */ + x = -EINVAL; + if (x < 0) { + len = x; + break; + } + len += x; + left -= x; + (*pos)++; + if (left < 256) + break; + } + read_unlock(&devs_lock); + if (len > 0 && copy_to_user(buf, (char *) page, len)) + len = -EFAULT; + free_page(page); + return len; +} + +static struct file_operations br2684_proc_operations = { + read: br2684_proc_read, +}; + +extern struct proc_dir_entry *atm_proc_root; /* from proc.c */ + +extern int (*br2684_ioctl_hook)(struct atm_vcc *, unsigned int, unsigned long); + +/* the following avoids some spurious warnings from the compiler */ +#define UNUSED __attribute__((unused)) + +static int __init UNUSED br2684_init(void) +{ + struct proc_dir_entry *p; + if ((p = create_proc_entry("br2684", 0, atm_proc_root)) == NULL) + return -ENOMEM; + p->proc_fops = &br2684_proc_operations; + br2684_ioctl_hook = br2684_ioctl; + return 0; +} + +static void __exit UNUSED br2684_exit(void) +{ + struct br2684_dev *brdev; + br2684_ioctl_hook = NULL; + remove_proc_entry("br2684", atm_proc_root); + while (!list_empty(&br2684_devs)) { + brdev = list_entry_brdev(br2684_devs.next); + unregister_netdev(&brdev->net_dev); + list_del(&brdev->br2684_devs); + kfree(brdev); + } +} + +module_init(br2684_init); +module_exit(br2684_exit); + +MODULE_AUTHOR("Marcell GAL"); +MODULE_DESCRIPTION("RFC2684 bridged protocols over ATM/AAL5"); +MODULE_LICENSE("GPL"); diff -urN /opt/kernel/linux/net/atm/common.c linux/net/atm/common.c --- /opt/kernel/linux/net/atm/common.c Mon Jan 7 15:41:52 2002 +++ linux/net/atm/common.c Wed Mar 20 20:36:07 2002 @@ -63,6 +63,13 @@ EXPORT_SYMBOL(pppoatm_ioctl_hook); #endif +#if defined(CONFIG_ATM_BR2684) || defined(CONFIG_ATM_BR2684_MODULE) +int (*br2684_ioctl_hook)(struct atm_vcc *, unsigned int, unsigned long); +#endif +#ifdef CONFIG_ATM_BR2684_MODULE +EXPORT_SYMBOL(br2684_ioctl_hook); +#endif + #include "resources.h" /* atm_find_dev */ #include "common.h" /* prototypes */ #include "protocols.h" /* atm_init_ */ @@ -785,6 +792,14 @@ goto done; } #endif +#if defined(CONFIG_ATM_BR2684) || defined(CONFIG_ATM_BR2684_MODULE) + if (br2684_ioctl_hook) { + ret_val = br2684_ioctl_hook(vcc, cmd, arg); + if (ret_val != -ENOIOCTLCMD) + goto done; + } +#endif + if (get_user(buf,&((struct atmif_sioc *) arg)->arg)) { ret_val = -EFAULT; goto done; diff -urN /opt/kernel/linux/net/atm/proc.c linux/net/atm/proc.c --- /opt/kernel/linux/net/atm/proc.c Mon Jan 7 15:41:19 2002 +++ linux/net/atm/proc.c Wed Mar 20 20:27:42 2002 @@ -551,9 +551,12 @@ digits = 0; for (num = dev->number; num; num /= 10) digits++; if (!digits) digits++; - dev->proc_name = kmalloc(strlen(dev->type)+digits+2,GFP_KERNEL); - if (!dev->proc_name) goto fail1; + + dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_ATOMIC); + if (!dev->proc_name) + goto fail1; sprintf(dev->proc_name,"%s:%d",dev->type, dev->number); + dev->proc_entry = create_proc_entry(dev->proc_name, 0, atm_proc_root); if (!dev->proc_entry) goto fail0; diff -urN /opt/kernel/linux/net/atm/resources.c linux/net/atm/resources.c --- /opt/kernel/linux/net/atm/resources.c Mon Jan 7 15:41:52 2002 +++ linux/net/atm/resources.c Wed Mar 20 20:28:52 2002 @@ -32,7 +32,7 @@ { struct atm_dev *dev; - dev = kmalloc(sizeof(*dev),GFP_KERNEL); + dev = kmalloc(sizeof(*dev), GFP_ATOMIC); if (!dev) return NULL; memset(dev,0,sizeof(*dev)); dev->type = type; @@ -40,32 +40,24 @@ dev->link_rate = ATM_OC3_PCR; dev->next = NULL; - spin_lock(&atm_dev_lock); - dev->prev = last_dev; if (atm_devs) last_dev->next = dev; else atm_devs = dev; last_dev = dev; - spin_unlock(&atm_dev_lock); return dev; } static void free_atm_dev(struct atm_dev *dev) { - spin_lock (&atm_dev_lock); - if (dev->prev) dev->prev->next = dev->next; else atm_devs = dev->next; if (dev->next) dev->next->prev = dev->prev; else last_dev = dev->prev; kfree(dev); - - spin_unlock (&atm_dev_lock); } - struct atm_dev *atm_find_dev(int number) { struct atm_dev *dev; @@ -75,60 +67,65 @@ return NULL; } - struct atm_dev *atm_dev_register(const char *type,const struct atmdev_ops *ops, int number,atm_dev_flags_t *flags) { - struct atm_dev *dev; + struct atm_dev *dev, *device = NULL; + + spin_lock(&atm_dev_lock); dev = alloc_atm_dev(type); if (!dev) { - printk(KERN_ERR "atm_dev_register: no space for dev %s\n", - type); - return NULL; + printk(KERN_ERR "atm_dev_register: no space for dev %s\n", type); + goto done; } if (number != -1) { if (atm_find_dev(number)) { free_atm_dev(dev); - return NULL; + goto done; } dev->number = number; - } - else { + } else { dev->number = 0; - while (atm_find_dev(dev->number)) dev->number++; + while (atm_find_dev(dev->number)) + dev->number++; } dev->vccs = dev->last = NULL; dev->dev_data = NULL; barrier(); dev->ops = ops; - if (flags) dev->flags = *flags; - else memset(&dev->flags,0,sizeof(dev->flags)); - memset((void *) &dev->stats,0,sizeof(dev->stats)); + if (flags) + dev->flags = *flags; + else + memset(&dev->flags, 0, sizeof(dev->flags)); + memset((void *) &dev->stats, 0, sizeof(dev->stats)); #ifdef CONFIG_PROC_FS if (ops->proc_read) if (atm_proc_dev_register(dev) < 0) { printk(KERN_ERR "atm_dev_register: " "atm_proc_dev_register failed for dev %s\n",type); - spin_unlock (&atm_dev_lock); free_atm_dev(dev); - return NULL; + goto done; } #endif - spin_unlock (&atm_dev_lock); - return dev; + device = dev; +done: + spin_unlock(&atm_dev_lock); + return device; } void atm_dev_deregister(struct atm_dev *dev) { #ifdef CONFIG_PROC_FS - if (dev->ops->proc_read) atm_proc_dev_deregister(dev); + if (dev->ops->proc_read) + atm_proc_dev_deregister(dev); #endif + spin_lock(&atm_dev_lock); free_atm_dev(dev); + spin_unlock(&atm_dev_lock); } - void shutdown_atm_dev(struct atm_dev *dev) { if (dev->vccs) { @@ -146,7 +143,6 @@ kfree(sk->protinfo.af_atm); } - struct sock *alloc_atm_vcc_sk(int family) { struct sock *sk;