Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* net/atm/clip.c - RFC1577 Classical IP over ATM */ |
| 2 | |
| 3 | /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ |
| 4 | |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 5 | #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ |
| 6 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | #include <linux/string.h> |
| 8 | #include <linux/errno.h> |
| 9 | #include <linux/kernel.h> /* for UINT_MAX */ |
| 10 | #include <linux/module.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/netdevice.h> |
| 13 | #include <linux/skbuff.h> |
| 14 | #include <linux/wait.h> |
| 15 | #include <linux/timer.h> |
| 16 | #include <linux/if_arp.h> /* for some manifest constants */ |
| 17 | #include <linux/notifier.h> |
| 18 | #include <linux/atm.h> |
| 19 | #include <linux/atmdev.h> |
| 20 | #include <linux/atmclip.h> |
| 21 | #include <linux/atmarp.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 22 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | #include <linux/ip.h> /* for net/route.h */ |
| 24 | #include <linux/in.h> /* for struct sockaddr_in */ |
| 25 | #include <linux/if.h> /* for IFF_UP */ |
| 26 | #include <linux/inetdevice.h> |
| 27 | #include <linux/bitops.h> |
Randy Dunlap | 4bdbf6c | 2006-07-03 19:47:27 -0700 | [diff] [blame] | 28 | #include <linux/poison.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include <linux/proc_fs.h> |
| 30 | #include <linux/seq_file.h> |
| 31 | #include <linux/rcupdate.h> |
| 32 | #include <linux/jhash.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 33 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <net/route.h> /* for struct rtable and routing */ |
| 35 | #include <net/icmp.h> /* icmp_send */ |
Joe Perches | e956ea1 | 2010-01-26 11:40:05 +0000 | [diff] [blame] | 36 | #include <linux/param.h> /* for HZ */ |
| 37 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <asm/byteorder.h> /* for htons etc. */ |
| 39 | #include <asm/system.h> /* save/restore_flags */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #include <asm/atomic.h> |
| 41 | |
| 42 | #include "common.h" |
| 43 | #include "resources.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <net/atmclip.h> |
| 45 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | static struct net_device *clip_devs; |
| 47 | static struct atm_vcc *atmarpd; |
| 48 | static struct neigh_table clip_tbl; |
| 49 | static struct timer_list idle_timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 51 | static int to_atmarpd(enum atmarp_ctrl_type type, int itf, __be32 ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | { |
| 53 | struct sock *sk; |
| 54 | struct atmarp_ctrl *ctrl; |
| 55 | struct sk_buff *skb; |
| 56 | |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 57 | pr_debug("(%d)\n", type); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 58 | if (!atmarpd) |
| 59 | return -EUNATCH; |
Joe Perches | e956ea1 | 2010-01-26 11:40:05 +0000 | [diff] [blame] | 60 | skb = alloc_skb(sizeof(struct atmarp_ctrl), GFP_ATOMIC); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 61 | if (!skb) |
| 62 | return -ENOMEM; |
Joe Perches | e956ea1 | 2010-01-26 11:40:05 +0000 | [diff] [blame] | 63 | ctrl = (struct atmarp_ctrl *)skb_put(skb, sizeof(struct atmarp_ctrl)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | ctrl->type = type; |
| 65 | ctrl->itf_num = itf; |
| 66 | ctrl->ip = ip; |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 67 | atm_force_charge(atmarpd, skb->truesize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
| 69 | sk = sk_atm(atmarpd); |
| 70 | skb_queue_tail(&sk->sk_receive_queue, skb); |
| 71 | sk->sk_data_ready(sk, skb->len); |
| 72 | return 0; |
| 73 | } |
| 74 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 75 | static void link_vcc(struct clip_vcc *clip_vcc, struct atmarp_entry *entry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | { |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 77 | pr_debug("%p to entry %p (neigh %p)\n", clip_vcc, entry, entry->neigh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | clip_vcc->entry = entry; |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 79 | clip_vcc->xoff = 0; /* @@@ may overrun buffer by one packet */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | clip_vcc->next = entry->vccs; |
| 81 | entry->vccs = clip_vcc; |
| 82 | entry->neigh->used = jiffies; |
| 83 | } |
| 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | static void unlink_clip_vcc(struct clip_vcc *clip_vcc) |
| 86 | { |
| 87 | struct atmarp_entry *entry = clip_vcc->entry; |
| 88 | struct clip_vcc **walk; |
| 89 | |
| 90 | if (!entry) { |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 91 | pr_crit("!clip_vcc->entry (clip_vcc %p)\n", clip_vcc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | return; |
| 93 | } |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 94 | netif_tx_lock_bh(entry->neigh->dev); /* block clip_start_xmit() */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | entry->neigh->used = jiffies; |
| 96 | for (walk = &entry->vccs; *walk; walk = &(*walk)->next) |
| 97 | if (*walk == clip_vcc) { |
| 98 | int error; |
| 99 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 100 | *walk = clip_vcc->next; /* atomic */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | clip_vcc->entry = NULL; |
| 102 | if (clip_vcc->xoff) |
| 103 | netif_wake_queue(entry->neigh->dev); |
| 104 | if (entry->vccs) |
| 105 | goto out; |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 106 | entry->expires = jiffies - 1; |
| 107 | /* force resolution or expiration */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | error = neigh_update(entry->neigh, NULL, NUD_NONE, |
| 109 | NEIGH_UPDATE_F_ADMIN); |
| 110 | if (error) |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 111 | pr_crit("neigh_update failed with %d\n", error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | goto out; |
| 113 | } |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 114 | pr_crit("ATMARP: failed (entry %p, vcc 0x%p)\n", entry, clip_vcc); |
Joe Perches | e956ea1 | 2010-01-26 11:40:05 +0000 | [diff] [blame] | 115 | out: |
Herbert Xu | 932ff27 | 2006-06-09 12:20:56 -0700 | [diff] [blame] | 116 | netif_tx_unlock_bh(entry->neigh->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | } |
| 118 | |
| 119 | /* The neighbour entry n->lock is held. */ |
| 120 | static int neigh_check_cb(struct neighbour *n) |
| 121 | { |
| 122 | struct atmarp_entry *entry = NEIGH2ENTRY(n); |
| 123 | struct clip_vcc *cv; |
| 124 | |
| 125 | for (cv = entry->vccs; cv; cv = cv->next) { |
| 126 | unsigned long exp = cv->last_use + cv->idle_timeout; |
| 127 | |
| 128 | if (cv->idle_timeout && time_after(jiffies, exp)) { |
Stephen Hemminger | 5224006 | 2007-08-28 15:22:09 -0700 | [diff] [blame] | 129 | pr_debug("releasing vcc %p->%p of entry %p\n", |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 130 | cv, cv->vcc, entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | vcc_release_async(cv->vcc, -ETIMEDOUT); |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | if (entry->vccs || time_before(jiffies, entry->expires)) |
| 136 | return 0; |
| 137 | |
| 138 | if (atomic_read(&n->refcnt) > 1) { |
| 139 | struct sk_buff *skb; |
| 140 | |
Stephen Hemminger | 5224006 | 2007-08-28 15:22:09 -0700 | [diff] [blame] | 141 | pr_debug("destruction postponed with ref %d\n", |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 142 | atomic_read(&n->refcnt)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 144 | while ((skb = skb_dequeue(&n->arp_queue)) != NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | dev_kfree_skb(skb); |
| 146 | |
| 147 | return 0; |
| 148 | } |
| 149 | |
Stephen Hemminger | 5224006 | 2007-08-28 15:22:09 -0700 | [diff] [blame] | 150 | pr_debug("expired neigh %p\n", n); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | return 1; |
| 152 | } |
| 153 | |
| 154 | static void idle_timer_check(unsigned long dummy) |
| 155 | { |
| 156 | write_lock(&clip_tbl.lock); |
| 157 | __neigh_for_each_release(&clip_tbl, neigh_check_cb); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 158 | mod_timer(&idle_timer, jiffies + CLIP_CHECK_INTERVAL * HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | write_unlock(&clip_tbl.lock); |
| 160 | } |
| 161 | |
| 162 | static int clip_arp_rcv(struct sk_buff *skb) |
| 163 | { |
| 164 | struct atm_vcc *vcc; |
| 165 | |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 166 | pr_debug("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | vcc = ATM_SKB(skb)->vcc; |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 168 | if (!vcc || !atm_charge(vcc, skb->truesize)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 169 | dev_kfree_skb_any(skb); |
| 170 | return 0; |
| 171 | } |
Stephen Hemminger | 5224006 | 2007-08-28 15:22:09 -0700 | [diff] [blame] | 172 | pr_debug("pushing to %p\n", vcc); |
| 173 | pr_debug("using %p\n", CLIP_VCC(vcc)->old_push); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 174 | CLIP_VCC(vcc)->old_push(vcc, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | static const unsigned char llc_oui[] = { |
| 179 | 0xaa, /* DSAP: non-ISO */ |
| 180 | 0xaa, /* SSAP: non-ISO */ |
| 181 | 0x03, /* Ctrl: Unnumbered Information Command PDU */ |
| 182 | 0x00, /* OUI: EtherType */ |
| 183 | 0x00, |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 184 | 0x00 |
| 185 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 187 | static void clip_push(struct atm_vcc *vcc, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | { |
| 189 | struct clip_vcc *clip_vcc = CLIP_VCC(vcc); |
| 190 | |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 191 | pr_debug("\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | if (!skb) { |
Stephen Hemminger | 5224006 | 2007-08-28 15:22:09 -0700 | [diff] [blame] | 193 | pr_debug("removing VCC %p\n", clip_vcc); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 194 | if (clip_vcc->entry) |
| 195 | unlink_clip_vcc(clip_vcc); |
| 196 | clip_vcc->old_push(vcc, NULL); /* pass on the bad news */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | kfree(clip_vcc); |
| 198 | return; |
| 199 | } |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 200 | atm_return(vcc, skb->truesize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | skb->dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : clip_devs; |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 202 | /* clip_vcc->entry == NULL if we don't have an IP address yet */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | if (!skb->dev) { |
| 204 | dev_kfree_skb_any(skb); |
| 205 | return; |
| 206 | } |
| 207 | ATM_SKB(skb)->vcc = vcc; |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 208 | skb_reset_mac_header(skb); |
Joe Perches | e956ea1 | 2010-01-26 11:40:05 +0000 | [diff] [blame] | 209 | if (!clip_vcc->encap || |
| 210 | skb->len < RFC1483LLC_LEN || |
| 211 | memcmp(skb->data, llc_oui, sizeof(llc_oui))) |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 212 | skb->protocol = htons(ETH_P_IP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | else { |
Joe Perches | e956ea1 | 2010-01-26 11:40:05 +0000 | [diff] [blame] | 214 | skb->protocol = ((__be16 *)skb->data)[3]; |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 215 | skb_pull(skb, RFC1483LLC_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | if (skb->protocol == htons(ETH_P_ARP)) { |
Stephen Hemminger | 1a6afe8 | 2009-01-09 13:01:00 +0000 | [diff] [blame] | 217 | skb->dev->stats.rx_packets++; |
| 218 | skb->dev->stats.rx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | clip_arp_rcv(skb); |
| 220 | return; |
| 221 | } |
| 222 | } |
| 223 | clip_vcc->last_use = jiffies; |
Stephen Hemminger | 1a6afe8 | 2009-01-09 13:01:00 +0000 | [diff] [blame] | 224 | skb->dev->stats.rx_packets++; |
| 225 | skb->dev->stats.rx_bytes += skb->len; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); |
| 227 | netif_rx(skb); |
| 228 | } |
| 229 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | /* |
| 231 | * Note: these spinlocks _must_not_ block on non-SMP. The only goal is that |
| 232 | * clip_pop is atomic with respect to the critical section in clip_start_xmit. |
| 233 | */ |
| 234 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 235 | static void clip_pop(struct atm_vcc *vcc, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | { |
| 237 | struct clip_vcc *clip_vcc = CLIP_VCC(vcc); |
| 238 | struct net_device *dev = skb->dev; |
| 239 | int old; |
| 240 | unsigned long flags; |
| 241 | |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 242 | pr_debug("(vcc %p)\n", vcc); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 243 | clip_vcc->old_pop(vcc, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | /* skb->dev == NULL in outbound ARP packets */ |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 245 | if (!dev) |
| 246 | return; |
| 247 | spin_lock_irqsave(&PRIV(dev)->xoff_lock, flags); |
| 248 | if (atm_may_send(vcc, 0)) { |
| 249 | old = xchg(&clip_vcc->xoff, 0); |
| 250 | if (old) |
| 251 | netif_wake_queue(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | } |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 253 | spin_unlock_irqrestore(&PRIV(dev)->xoff_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | } |
| 255 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 256 | static void clip_neigh_solicit(struct neighbour *neigh, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | { |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 258 | pr_debug("(neigh %p, skb %p)\n", neigh, skb); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 259 | to_atmarpd(act_need, PRIV(neigh->dev)->number, NEIGH2ENTRY(neigh)->ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | } |
| 261 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 262 | static void clip_neigh_error(struct neighbour *neigh, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | { |
| 264 | #ifndef CONFIG_ATM_CLIP_NO_ICMP |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 265 | icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | #endif |
| 267 | kfree_skb(skb); |
| 268 | } |
| 269 | |
Stephen Hemminger | 89d69d2 | 2009-09-01 11:13:19 +0000 | [diff] [blame] | 270 | static const struct neigh_ops clip_neigh_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | .family = AF_INET, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | .solicit = clip_neigh_solicit, |
| 273 | .error_report = clip_neigh_error, |
| 274 | .output = dev_queue_xmit, |
| 275 | .connected_output = dev_queue_xmit, |
| 276 | .hh_output = dev_queue_xmit, |
| 277 | .queue_xmit = dev_queue_xmit, |
| 278 | }; |
| 279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | static int clip_constructor(struct neighbour *neigh) |
| 281 | { |
| 282 | struct atmarp_entry *entry = NEIGH2ENTRY(neigh); |
| 283 | struct net_device *dev = neigh->dev; |
| 284 | struct in_device *in_dev; |
| 285 | struct neigh_parms *parms; |
| 286 | |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 287 | pr_debug("(neigh %p, entry %p)\n", neigh, entry); |
Eric W. Biederman | 6b175b2 | 2008-01-10 03:25:28 -0800 | [diff] [blame] | 288 | neigh->type = inet_addr_type(&init_net, entry->ip); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 289 | if (neigh->type != RTN_UNICAST) |
| 290 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
| 292 | rcu_read_lock(); |
Herbert Xu | e5ed639 | 2005-10-03 14:35:55 -0700 | [diff] [blame] | 293 | in_dev = __in_dev_get_rcu(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | if (!in_dev) { |
| 295 | rcu_read_unlock(); |
| 296 | return -EINVAL; |
| 297 | } |
| 298 | |
| 299 | parms = in_dev->arp_parms; |
| 300 | __neigh_parms_put(neigh->parms); |
| 301 | neigh->parms = neigh_parms_clone(parms); |
| 302 | rcu_read_unlock(); |
| 303 | |
| 304 | neigh->ops = &clip_neigh_ops; |
| 305 | neigh->output = neigh->nud_state & NUD_VALID ? |
| 306 | neigh->ops->connected_output : neigh->ops->output; |
| 307 | entry->neigh = neigh; |
| 308 | entry->vccs = NULL; |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 309 | entry->expires = jiffies - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | return 0; |
| 311 | } |
| 312 | |
Eric Dumazet | d6bf781 | 2010-10-04 06:15:44 +0000 | [diff] [blame] | 313 | static u32 clip_hash(const void *pkey, const struct net_device *dev, __u32 rnd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | { |
Eric Dumazet | d6bf781 | 2010-10-04 06:15:44 +0000 | [diff] [blame] | 315 | return jhash_2words(*(u32 *) pkey, dev->ifindex, rnd); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | } |
| 317 | |
| 318 | static struct neigh_table clip_tbl = { |
| 319 | .family = AF_INET, |
| 320 | .entry_size = sizeof(struct neighbour)+sizeof(struct atmarp_entry), |
| 321 | .key_len = 4, |
| 322 | .hash = clip_hash, |
| 323 | .constructor = clip_constructor, |
| 324 | .id = "clip_arp_cache", |
| 325 | |
| 326 | /* parameters are copied from ARP ... */ |
| 327 | .parms = { |
| 328 | .tbl = &clip_tbl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | .base_reachable_time = 30 * HZ, |
| 330 | .retrans_time = 1 * HZ, |
| 331 | .gc_staletime = 60 * HZ, |
| 332 | .reachable_time = 30 * HZ, |
| 333 | .delay_probe_time = 5 * HZ, |
| 334 | .queue_len = 3, |
| 335 | .ucast_probes = 3, |
| 336 | .mcast_probes = 3, |
| 337 | .anycast_delay = 1 * HZ, |
| 338 | .proxy_delay = (8 * HZ) / 10, |
| 339 | .proxy_qlen = 64, |
| 340 | .locktime = 1 * HZ, |
| 341 | }, |
| 342 | .gc_interval = 30 * HZ, |
| 343 | .gc_thresh1 = 128, |
| 344 | .gc_thresh2 = 512, |
| 345 | .gc_thresh3 = 1024, |
| 346 | }; |
| 347 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | /* @@@ copy bh locking from arp.c -- need to bh-enable atm code before */ |
| 349 | |
| 350 | /* |
| 351 | * We play with the resolve flag: 0 and 1 have the usual meaning, but -1 means |
| 352 | * to allocate the neighbour entry but not to ask atmarpd for resolution. Also, |
| 353 | * don't increment the usage count. This is used to create entries in |
| 354 | * clip_setentry. |
| 355 | */ |
| 356 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 357 | static int clip_encap(struct atm_vcc *vcc, int mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 358 | { |
| 359 | CLIP_VCC(vcc)->encap = mode; |
| 360 | return 0; |
| 361 | } |
| 362 | |
Stephen Hemminger | 3c805a2 | 2009-08-31 19:50:42 +0000 | [diff] [blame] | 363 | static netdev_tx_t clip_start_xmit(struct sk_buff *skb, |
| 364 | struct net_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | { |
| 366 | struct clip_priv *clip_priv = PRIV(dev); |
| 367 | struct atmarp_entry *entry; |
| 368 | struct atm_vcc *vcc; |
| 369 | int old; |
| 370 | unsigned long flags; |
| 371 | |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 372 | pr_debug("(skb %p)\n", skb); |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 373 | if (!skb_dst(skb)) { |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 374 | pr_err("skb_dst(skb) == NULL\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | dev_kfree_skb(skb); |
Stephen Hemminger | 1a6afe8 | 2009-01-09 13:01:00 +0000 | [diff] [blame] | 376 | dev->stats.tx_dropped++; |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 377 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | } |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 379 | if (!skb_dst(skb)->neighbour) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | #if 0 |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 381 | skb_dst(skb)->neighbour = clip_find_neighbour(skb_dst(skb), 1); |
| 382 | if (!skb_dst(skb)->neighbour) { |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 383 | dev_kfree_skb(skb); /* lost that one */ |
Stephen Hemminger | 1a6afe8 | 2009-01-09 13:01:00 +0000 | [diff] [blame] | 384 | dev->stats.tx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | return 0; |
| 386 | } |
| 387 | #endif |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 388 | pr_err("NO NEIGHBOUR !\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | dev_kfree_skb(skb); |
Stephen Hemminger | 1a6afe8 | 2009-01-09 13:01:00 +0000 | [diff] [blame] | 390 | dev->stats.tx_dropped++; |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 391 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | } |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 393 | entry = NEIGH2ENTRY(skb_dst(skb)->neighbour); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | if (!entry->vccs) { |
| 395 | if (time_after(jiffies, entry->expires)) { |
| 396 | /* should be resolved */ |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 397 | entry->expires = jiffies + ATMARP_RETRY_DELAY * HZ; |
| 398 | to_atmarpd(act_need, PRIV(dev)->number, entry->ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | } |
| 400 | if (entry->neigh->arp_queue.qlen < ATMARP_MAX_UNRES_PACKETS) |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 401 | skb_queue_tail(&entry->neigh->arp_queue, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | else { |
| 403 | dev_kfree_skb(skb); |
Stephen Hemminger | 1a6afe8 | 2009-01-09 13:01:00 +0000 | [diff] [blame] | 404 | dev->stats.tx_dropped++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | } |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 406 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | } |
Stephen Hemminger | 5224006 | 2007-08-28 15:22:09 -0700 | [diff] [blame] | 408 | pr_debug("neigh %p, vccs %p\n", entry, entry->vccs); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | ATM_SKB(skb)->vcc = vcc = entry->vccs->vcc; |
Eric Dumazet | adf3090 | 2009-06-02 05:19:30 +0000 | [diff] [blame] | 410 | pr_debug("using neighbour %p, vcc %p\n", skb_dst(skb)->neighbour, vcc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | if (entry->vccs->encap) { |
| 412 | void *here; |
| 413 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 414 | here = skb_push(skb, RFC1483LLC_LEN); |
| 415 | memcpy(here, llc_oui, sizeof(llc_oui)); |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 416 | ((__be16 *) here)[3] = skb->protocol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | } |
| 418 | atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); |
| 419 | ATM_SKB(skb)->atm_options = vcc->atm_options; |
| 420 | entry->vccs->last_use = jiffies; |
Stephen Hemminger | 5224006 | 2007-08-28 15:22:09 -0700 | [diff] [blame] | 421 | pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, vcc, vcc->dev); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 422 | old = xchg(&entry->vccs->xoff, 1); /* assume XOFF ... */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | if (old) { |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 424 | pr_warning("XOFF->XOFF transition\n"); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 425 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | } |
Stephen Hemminger | 1a6afe8 | 2009-01-09 13:01:00 +0000 | [diff] [blame] | 427 | dev->stats.tx_packets++; |
| 428 | dev->stats.tx_bytes += skb->len; |
Stephen Hemminger | 5ff765f | 2006-04-14 16:00:59 -0700 | [diff] [blame] | 429 | vcc->send(vcc, skb); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 430 | if (atm_may_send(vcc, 0)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | entry->vccs->xoff = 0; |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 432 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | } |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 434 | spin_lock_irqsave(&clip_priv->xoff_lock, flags); |
| 435 | netif_stop_queue(dev); /* XOFF -> throttle immediately */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | barrier(); |
| 437 | if (!entry->vccs->xoff) |
| 438 | netif_start_queue(dev); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 439 | /* Oh, we just raced with clip_pop. netif_start_queue should be |
| 440 | good enough, because nothing should really be asleep because |
| 441 | of the brief netif_stop_queue. If this isn't true or if it |
| 442 | changes, use netif_wake_queue instead. */ |
| 443 | spin_unlock_irqrestore(&clip_priv->xoff_lock, flags); |
Patrick McHardy | 6ed1065 | 2009-06-23 06:03:08 +0000 | [diff] [blame] | 444 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | } |
| 446 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 447 | static int clip_mkip(struct atm_vcc *vcc, int timeout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | { |
David S. Miller | b6211ae | 2009-05-28 16:36:47 -0700 | [diff] [blame] | 449 | struct sk_buff_head *rq, queue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | struct clip_vcc *clip_vcc; |
David S. Miller | b6211ae | 2009-05-28 16:36:47 -0700 | [diff] [blame] | 451 | struct sk_buff *skb, *tmp; |
David S. Miller | c40a27f | 2006-11-30 21:05:23 -0800 | [diff] [blame] | 452 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 454 | if (!vcc->push) |
| 455 | return -EBADFD; |
| 456 | clip_vcc = kmalloc(sizeof(struct clip_vcc), GFP_KERNEL); |
| 457 | if (!clip_vcc) |
| 458 | return -ENOMEM; |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 459 | pr_debug("%p vcc %p\n", clip_vcc, vcc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | clip_vcc->vcc = vcc; |
| 461 | vcc->user_back = clip_vcc; |
| 462 | set_bit(ATM_VF_IS_CLIP, &vcc->flags); |
| 463 | clip_vcc->entry = NULL; |
| 464 | clip_vcc->xoff = 0; |
| 465 | clip_vcc->encap = 1; |
| 466 | clip_vcc->last_use = jiffies; |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 467 | clip_vcc->idle_timeout = timeout * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | clip_vcc->old_push = vcc->push; |
| 469 | clip_vcc->old_pop = vcc->pop; |
| 470 | vcc->push = clip_push; |
| 471 | vcc->pop = clip_pop; |
David S. Miller | c40a27f | 2006-11-30 21:05:23 -0800 | [diff] [blame] | 472 | |
David S. Miller | b6211ae | 2009-05-28 16:36:47 -0700 | [diff] [blame] | 473 | __skb_queue_head_init(&queue); |
David S. Miller | c40a27f | 2006-11-30 21:05:23 -0800 | [diff] [blame] | 474 | rq = &sk_atm(vcc)->sk_receive_queue; |
| 475 | |
| 476 | spin_lock_irqsave(&rq->lock, flags); |
David S. Miller | b6211ae | 2009-05-28 16:36:47 -0700 | [diff] [blame] | 477 | skb_queue_splice_init(rq, &queue); |
David S. Miller | c40a27f | 2006-11-30 21:05:23 -0800 | [diff] [blame] | 478 | spin_unlock_irqrestore(&rq->lock, flags); |
| 479 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | /* re-process everything received between connection setup and MKIP */ |
David S. Miller | b6211ae | 2009-05-28 16:36:47 -0700 | [diff] [blame] | 481 | skb_queue_walk_safe(&queue, skb, tmp) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | if (!clip_devs) { |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 483 | atm_return(vcc, skb->truesize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | kfree_skb(skb); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 485 | } else { |
David S. Miller | b6211ae | 2009-05-28 16:36:47 -0700 | [diff] [blame] | 486 | struct net_device *dev = skb->dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | unsigned int len = skb->len; |
| 488 | |
YOSHIFUJI Hideaki | fe26109 | 2006-09-18 06:37:58 -0700 | [diff] [blame] | 489 | skb_get(skb); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 490 | clip_push(vcc, skb); |
David S. Miller | b6211ae | 2009-05-28 16:36:47 -0700 | [diff] [blame] | 491 | dev->stats.rx_packets--; |
| 492 | dev->stats.rx_bytes -= len; |
YOSHIFUJI Hideaki | fe26109 | 2006-09-18 06:37:58 -0700 | [diff] [blame] | 493 | kfree_skb(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | } |
David S. Miller | c40a27f | 2006-11-30 21:05:23 -0800 | [diff] [blame] | 495 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | return 0; |
| 497 | } |
| 498 | |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 499 | static int clip_setentry(struct atm_vcc *vcc, __be32 ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | { |
| 501 | struct neighbour *neigh; |
| 502 | struct atmarp_entry *entry; |
| 503 | int error; |
| 504 | struct clip_vcc *clip_vcc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | struct rtable *rt; |
| 506 | |
| 507 | if (vcc->push != clip_push) { |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 508 | pr_warning("non-CLIP VCC\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | return -EBADF; |
| 510 | } |
| 511 | clip_vcc = CLIP_VCC(vcc); |
| 512 | if (!ip) { |
| 513 | if (!clip_vcc->entry) { |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 514 | pr_err("hiding hidden ATMARP entry\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | return 0; |
| 516 | } |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 517 | pr_debug("remove\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | unlink_clip_vcc(clip_vcc); |
| 519 | return 0; |
| 520 | } |
David S. Miller | 78fbfd8 | 2011-03-12 00:00:52 -0500 | [diff] [blame] | 521 | rt = ip_route_output(&init_net, ip, 0, 1, 0); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 522 | if (IS_ERR(rt)) |
| 523 | return PTR_ERR(rt); |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 524 | neigh = __neigh_lookup(&clip_tbl, &ip, rt->dst.dev, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 525 | ip_rt_put(rt); |
| 526 | if (!neigh) |
| 527 | return -ENOMEM; |
| 528 | entry = NEIGH2ENTRY(neigh); |
| 529 | if (entry != clip_vcc->entry) { |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 530 | if (!clip_vcc->entry) |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 531 | pr_debug("add\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | else { |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 533 | pr_debug("update\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | unlink_clip_vcc(clip_vcc); |
| 535 | } |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 536 | link_vcc(clip_vcc, entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | } |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 538 | error = neigh_update(neigh, llc_oui, NUD_PERMANENT, |
| 539 | NEIGH_UPDATE_F_OVERRIDE | NEIGH_UPDATE_F_ADMIN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | neigh_release(neigh); |
| 541 | return error; |
| 542 | } |
| 543 | |
Stephen Hemminger | dde0975 | 2009-03-20 19:35:29 +0000 | [diff] [blame] | 544 | static const struct net_device_ops clip_netdev_ops = { |
| 545 | .ndo_start_xmit = clip_start_xmit, |
| 546 | }; |
| 547 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | static void clip_setup(struct net_device *dev) |
| 549 | { |
Stephen Hemminger | dde0975 | 2009-03-20 19:35:29 +0000 | [diff] [blame] | 550 | dev->netdev_ops = &clip_netdev_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | dev->type = ARPHRD_ATM; |
| 552 | dev->hard_header_len = RFC1483LLC_LEN; |
| 553 | dev->mtu = RFC1626_MTU; |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 554 | dev->tx_queue_len = 100; /* "normal" queue (packets) */ |
| 555 | /* When using a "real" qdisc, the qdisc determines the queue */ |
| 556 | /* length. tx_queue_len is only used for the default case, */ |
| 557 | /* without any more elaborate queuing. 100 is a reasonable */ |
| 558 | /* compromise between decent burst-tolerance and protection */ |
| 559 | /* against memory hogs. */ |
Eric Dumazet | a489e51 | 2009-05-28 11:14:49 +0000 | [diff] [blame] | 560 | dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | } |
| 562 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | static int clip_create(int number) |
| 564 | { |
| 565 | struct net_device *dev; |
| 566 | struct clip_priv *clip_priv; |
| 567 | int error; |
| 568 | |
| 569 | if (number != -1) { |
| 570 | for (dev = clip_devs; dev; dev = PRIV(dev)->next) |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 571 | if (PRIV(dev)->number == number) |
| 572 | return -EEXIST; |
| 573 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | number = 0; |
| 575 | for (dev = clip_devs; dev; dev = PRIV(dev)->next) |
| 576 | if (PRIV(dev)->number >= number) |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 577 | number = PRIV(dev)->number + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 578 | } |
| 579 | dev = alloc_netdev(sizeof(struct clip_priv), "", clip_setup); |
| 580 | if (!dev) |
| 581 | return -ENOMEM; |
| 582 | clip_priv = PRIV(dev); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 583 | sprintf(dev->name, "atm%d", number); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | spin_lock_init(&clip_priv->xoff_lock); |
| 585 | clip_priv->number = number; |
| 586 | error = register_netdev(dev); |
| 587 | if (error) { |
| 588 | free_netdev(dev); |
| 589 | return error; |
| 590 | } |
| 591 | clip_priv->next = clip_devs; |
| 592 | clip_devs = dev; |
Stephen Hemminger | 5224006 | 2007-08-28 15:22:09 -0700 | [diff] [blame] | 593 | pr_debug("registered (net:%s)\n", dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | return number; |
| 595 | } |
| 596 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 597 | static int clip_device_event(struct notifier_block *this, unsigned long event, |
Stephen Hemminger | f3a0592 | 2006-04-14 15:07:27 -0700 | [diff] [blame] | 598 | void *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | { |
Stephen Hemminger | f3a0592 | 2006-04-14 15:07:27 -0700 | [diff] [blame] | 600 | struct net_device *dev = arg; |
| 601 | |
YOSHIFUJI Hideaki | 721499e | 2008-07-19 22:34:43 -0700 | [diff] [blame] | 602 | if (!net_eq(dev_net(dev), &init_net)) |
Eric W. Biederman | e9dc865 | 2007-09-12 13:02:17 +0200 | [diff] [blame] | 603 | return NOTIFY_DONE; |
| 604 | |
Stephen Hemminger | f3a0592 | 2006-04-14 15:07:27 -0700 | [diff] [blame] | 605 | if (event == NETDEV_UNREGISTER) { |
| 606 | neigh_ifdown(&clip_tbl, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | return NOTIFY_DONE; |
Stephen Hemminger | f3a0592 | 2006-04-14 15:07:27 -0700 | [diff] [blame] | 608 | } |
| 609 | |
| 610 | /* ignore non-CLIP devices */ |
Stephen Hemminger | dde0975 | 2009-03-20 19:35:29 +0000 | [diff] [blame] | 611 | if (dev->type != ARPHRD_ATM || dev->netdev_ops != &clip_netdev_ops) |
Stephen Hemminger | f3a0592 | 2006-04-14 15:07:27 -0700 | [diff] [blame] | 612 | return NOTIFY_DONE; |
| 613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | switch (event) { |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 615 | case NETDEV_UP: |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 616 | pr_debug("NETDEV_UP\n"); |
Stephen Hemminger | 5ff765f | 2006-04-14 16:00:59 -0700 | [diff] [blame] | 617 | to_atmarpd(act_up, PRIV(dev)->number, 0); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 618 | break; |
| 619 | case NETDEV_GOING_DOWN: |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 620 | pr_debug("NETDEV_DOWN\n"); |
Stephen Hemminger | 5ff765f | 2006-04-14 16:00:59 -0700 | [diff] [blame] | 621 | to_atmarpd(act_down, PRIV(dev)->number, 0); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 622 | break; |
| 623 | case NETDEV_CHANGE: |
| 624 | case NETDEV_CHANGEMTU: |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 625 | pr_debug("NETDEV_CHANGE*\n"); |
Stephen Hemminger | 5ff765f | 2006-04-14 16:00:59 -0700 | [diff] [blame] | 626 | to_atmarpd(act_change, PRIV(dev)->number, 0); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 627 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | } |
| 629 | return NOTIFY_DONE; |
| 630 | } |
| 631 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 632 | static int clip_inet_event(struct notifier_block *this, unsigned long event, |
| 633 | void *ifa) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | { |
| 635 | struct in_device *in_dev; |
| 636 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 637 | in_dev = ((struct in_ifaddr *)ifa)->ifa_dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | /* |
| 639 | * Transitions are of the down-change-up type, so it's sufficient to |
| 640 | * handle the change on up. |
| 641 | */ |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 642 | if (event != NETDEV_UP) |
| 643 | return NOTIFY_DONE; |
| 644 | return clip_device_event(this, NETDEV_CHANGE, in_dev->dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | } |
| 646 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | static struct notifier_block clip_dev_notifier = { |
Stephen Hemminger | 5ff765f | 2006-04-14 16:00:59 -0700 | [diff] [blame] | 648 | .notifier_call = clip_device_event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 649 | }; |
| 650 | |
| 651 | |
| 652 | |
| 653 | static struct notifier_block clip_inet_notifier = { |
Stephen Hemminger | 5ff765f | 2006-04-14 16:00:59 -0700 | [diff] [blame] | 654 | .notifier_call = clip_inet_event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | }; |
| 656 | |
| 657 | |
| 658 | |
| 659 | static void atmarpd_close(struct atm_vcc *vcc) |
| 660 | { |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 661 | pr_debug("\n"); |
Stephen Hemminger | f3a0592 | 2006-04-14 15:07:27 -0700 | [diff] [blame] | 662 | |
| 663 | rtnl_lock(); |
| 664 | atmarpd = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | skb_queue_purge(&sk_atm(vcc)->sk_receive_queue); |
Stephen Hemminger | f3a0592 | 2006-04-14 15:07:27 -0700 | [diff] [blame] | 666 | rtnl_unlock(); |
| 667 | |
Stephen Hemminger | 5224006 | 2007-08-28 15:22:09 -0700 | [diff] [blame] | 668 | pr_debug("(done)\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 669 | module_put(THIS_MODULE); |
| 670 | } |
| 671 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | static struct atmdev_ops atmarpd_dev_ops = { |
| 673 | .close = atmarpd_close |
| 674 | }; |
| 675 | |
| 676 | |
| 677 | static struct atm_dev atmarpd_dev = { |
| 678 | .ops = &atmarpd_dev_ops, |
| 679 | .type = "arpd", |
| 680 | .number = 999, |
Milind Arun Choudhary | 4ef8d0a | 2007-04-26 01:37:44 -0700 | [diff] [blame] | 681 | .lock = __SPIN_LOCK_UNLOCKED(atmarpd_dev.lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | }; |
| 683 | |
| 684 | |
| 685 | static int atm_init_atmarp(struct atm_vcc *vcc) |
| 686 | { |
Stephen Hemminger | f3a0592 | 2006-04-14 15:07:27 -0700 | [diff] [blame] | 687 | rtnl_lock(); |
| 688 | if (atmarpd) { |
| 689 | rtnl_unlock(); |
| 690 | return -EADDRINUSE; |
| 691 | } |
| 692 | |
Joe Perches | e956ea1 | 2010-01-26 11:40:05 +0000 | [diff] [blame] | 693 | mod_timer(&idle_timer, jiffies + CLIP_CHECK_INTERVAL * HZ); |
Stephen Hemminger | 2d90739 | 2006-04-14 15:56:02 -0700 | [diff] [blame] | 694 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | atmarpd = vcc; |
Joe Perches | e956ea1 | 2010-01-26 11:40:05 +0000 | [diff] [blame] | 696 | set_bit(ATM_VF_META, &vcc->flags); |
| 697 | set_bit(ATM_VF_READY, &vcc->flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | /* allow replies and avoid getting closed if signaling dies */ |
| 699 | vcc->dev = &atmarpd_dev; |
| 700 | vcc_insert_socket(sk_atm(vcc)); |
| 701 | vcc->push = NULL; |
| 702 | vcc->pop = NULL; /* crash */ |
| 703 | vcc->push_oam = NULL; /* crash */ |
Stephen Hemminger | f3a0592 | 2006-04-14 15:07:27 -0700 | [diff] [blame] | 704 | rtnl_unlock(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | return 0; |
| 706 | } |
| 707 | |
| 708 | static int clip_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 709 | { |
| 710 | struct atm_vcc *vcc = ATM_SD(sock); |
| 711 | int err = 0; |
| 712 | |
| 713 | switch (cmd) { |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 714 | case SIOCMKCLIP: |
| 715 | case ATMARPD_CTRL: |
| 716 | case ATMARP_MKIP: |
| 717 | case ATMARP_SETENTRY: |
| 718 | case ATMARP_ENCAP: |
| 719 | if (!capable(CAP_NET_ADMIN)) |
| 720 | return -EPERM; |
| 721 | break; |
| 722 | default: |
| 723 | return -ENOIOCTLCMD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | } |
| 725 | |
| 726 | switch (cmd) { |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 727 | case SIOCMKCLIP: |
| 728 | err = clip_create(arg); |
| 729 | break; |
| 730 | case ATMARPD_CTRL: |
| 731 | err = atm_init_atmarp(vcc); |
| 732 | if (!err) { |
| 733 | sock->state = SS_CONNECTED; |
| 734 | __module_get(THIS_MODULE); |
| 735 | } |
| 736 | break; |
| 737 | case ATMARP_MKIP: |
| 738 | err = clip_mkip(vcc, arg); |
| 739 | break; |
| 740 | case ATMARP_SETENTRY: |
Al Viro | 30d492d | 2006-11-14 21:11:29 -0800 | [diff] [blame] | 741 | err = clip_setentry(vcc, (__force __be32)arg); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 742 | break; |
| 743 | case ATMARP_ENCAP: |
| 744 | err = clip_encap(vcc, arg); |
| 745 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | } |
| 747 | return err; |
| 748 | } |
| 749 | |
| 750 | static struct atm_ioctl clip_ioctl_ops = { |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 751 | .owner = THIS_MODULE, |
| 752 | .ioctl = clip_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | }; |
| 754 | |
| 755 | #ifdef CONFIG_PROC_FS |
| 756 | |
| 757 | static void svc_addr(struct seq_file *seq, struct sockaddr_atmsvc *addr) |
| 758 | { |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 759 | static int code[] = { 1, 2, 10, 6, 1, 0 }; |
| 760 | static int e164[] = { 1, 8, 4, 6, 1, 0 }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | |
| 762 | if (*addr->sas_addr.pub) { |
| 763 | seq_printf(seq, "%s", addr->sas_addr.pub); |
| 764 | if (*addr->sas_addr.prv) |
| 765 | seq_putc(seq, '+'); |
| 766 | } else if (!*addr->sas_addr.prv) { |
| 767 | seq_printf(seq, "%s", "(none)"); |
| 768 | return; |
| 769 | } |
| 770 | if (*addr->sas_addr.prv) { |
| 771 | unsigned char *prv = addr->sas_addr.prv; |
| 772 | int *fields; |
| 773 | int i, j; |
| 774 | |
| 775 | fields = *prv == ATM_AFI_E164 ? e164 : code; |
| 776 | for (i = 0; fields[i]; i++) { |
| 777 | for (j = fields[i]; j; j--) |
| 778 | seq_printf(seq, "%02X", *prv++); |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 779 | if (fields[i + 1]) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 780 | seq_putc(seq, '.'); |
| 781 | } |
| 782 | } |
| 783 | } |
| 784 | |
| 785 | /* This means the neighbour entry has no attached VCC objects. */ |
| 786 | #define SEQ_NO_VCC_TOKEN ((void *) 2) |
| 787 | |
| 788 | static void atmarp_info(struct seq_file *seq, struct net_device *dev, |
| 789 | struct atmarp_entry *entry, struct clip_vcc *clip_vcc) |
| 790 | { |
| 791 | unsigned long exp; |
| 792 | char buf[17]; |
| 793 | int svc, llc, off; |
| 794 | |
| 795 | svc = ((clip_vcc == SEQ_NO_VCC_TOKEN) || |
| 796 | (sk_atm(clip_vcc->vcc)->sk_family == AF_ATMSVC)); |
| 797 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 798 | llc = ((clip_vcc == SEQ_NO_VCC_TOKEN) || clip_vcc->encap); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | |
| 800 | if (clip_vcc == SEQ_NO_VCC_TOKEN) |
| 801 | exp = entry->neigh->used; |
| 802 | else |
| 803 | exp = clip_vcc->last_use; |
| 804 | |
| 805 | exp = (jiffies - exp) / HZ; |
| 806 | |
| 807 | seq_printf(seq, "%-6s%-4s%-4s%5ld ", |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 808 | dev->name, svc ? "SVC" : "PVC", llc ? "LLC" : "NULL", exp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 809 | |
Harvey Harrison | 21454aa | 2008-10-31 00:54:56 -0700 | [diff] [blame] | 810 | off = scnprintf(buf, sizeof(buf) - 1, "%pI4", |
| 811 | &entry->ip); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | while (off < 16) |
| 813 | buf[off++] = ' '; |
| 814 | buf[off] = '\0'; |
| 815 | seq_printf(seq, "%s", buf); |
| 816 | |
| 817 | if (clip_vcc == SEQ_NO_VCC_TOKEN) { |
| 818 | if (time_before(jiffies, entry->expires)) |
| 819 | seq_printf(seq, "(resolving)\n"); |
| 820 | else |
| 821 | seq_printf(seq, "(expired, ref %d)\n", |
| 822 | atomic_read(&entry->neigh->refcnt)); |
| 823 | } else if (!svc) { |
| 824 | seq_printf(seq, "%d.%d.%d\n", |
| 825 | clip_vcc->vcc->dev->number, |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 826 | clip_vcc->vcc->vpi, clip_vcc->vcc->vci); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 827 | } else { |
| 828 | svc_addr(seq, &clip_vcc->vcc->remote); |
| 829 | seq_putc(seq, '\n'); |
| 830 | } |
| 831 | } |
| 832 | |
| 833 | struct clip_seq_state { |
| 834 | /* This member must be first. */ |
| 835 | struct neigh_seq_state ns; |
| 836 | |
| 837 | /* Local to clip specific iteration. */ |
| 838 | struct clip_vcc *vcc; |
| 839 | }; |
| 840 | |
| 841 | static struct clip_vcc *clip_seq_next_vcc(struct atmarp_entry *e, |
| 842 | struct clip_vcc *curr) |
| 843 | { |
| 844 | if (!curr) { |
| 845 | curr = e->vccs; |
| 846 | if (!curr) |
| 847 | return SEQ_NO_VCC_TOKEN; |
| 848 | return curr; |
| 849 | } |
| 850 | if (curr == SEQ_NO_VCC_TOKEN) |
| 851 | return NULL; |
| 852 | |
| 853 | curr = curr->next; |
| 854 | |
| 855 | return curr; |
| 856 | } |
| 857 | |
| 858 | static void *clip_seq_vcc_walk(struct clip_seq_state *state, |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 859 | struct atmarp_entry *e, loff_t * pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | { |
| 861 | struct clip_vcc *vcc = state->vcc; |
| 862 | |
| 863 | vcc = clip_seq_next_vcc(e, vcc); |
| 864 | if (vcc && pos != NULL) { |
| 865 | while (*pos) { |
| 866 | vcc = clip_seq_next_vcc(e, vcc); |
| 867 | if (!vcc) |
| 868 | break; |
| 869 | --(*pos); |
| 870 | } |
| 871 | } |
| 872 | state->vcc = vcc; |
| 873 | |
| 874 | return vcc; |
| 875 | } |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 876 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | static void *clip_seq_sub_iter(struct neigh_seq_state *_state, |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 878 | struct neighbour *n, loff_t * pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | { |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 880 | struct clip_seq_state *state = (struct clip_seq_state *)_state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | |
| 882 | return clip_seq_vcc_walk(state, NEIGH2ENTRY(n), pos); |
| 883 | } |
| 884 | |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 885 | static void *clip_seq_start(struct seq_file *seq, loff_t * pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | { |
Denis V. Lunev | ae22120 | 2008-01-10 03:52:35 -0800 | [diff] [blame] | 887 | struct clip_seq_state *state = seq->private; |
| 888 | state->ns.neigh_sub_iter = clip_seq_sub_iter; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | return neigh_seq_start(seq, pos, &clip_tbl, NEIGH_SEQ_NEIGH_ONLY); |
| 890 | } |
| 891 | |
| 892 | static int clip_seq_show(struct seq_file *seq, void *v) |
| 893 | { |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 894 | static char atm_arp_banner[] = |
| 895 | "IPitf TypeEncp Idle IP address ATM address\n"; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | |
| 897 | if (v == SEQ_START_TOKEN) { |
| 898 | seq_puts(seq, atm_arp_banner); |
| 899 | } else { |
| 900 | struct clip_seq_state *state = seq->private; |
| 901 | struct neighbour *n = v; |
| 902 | struct clip_vcc *vcc = state->vcc; |
| 903 | |
| 904 | atmarp_info(seq, n->dev, NEIGH2ENTRY(n), vcc); |
| 905 | } |
Stephen Hemminger | e49e76d | 2006-04-14 15:59:37 -0700 | [diff] [blame] | 906 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 907 | } |
| 908 | |
Philippe De Muyter | 56b3d97 | 2007-07-10 23:07:31 -0700 | [diff] [blame] | 909 | static const struct seq_operations arp_seq_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | .start = clip_seq_start, |
| 911 | .next = neigh_seq_next, |
| 912 | .stop = neigh_seq_stop, |
| 913 | .show = clip_seq_show, |
| 914 | }; |
| 915 | |
| 916 | static int arp_seq_open(struct inode *inode, struct file *file) |
| 917 | { |
Denis V. Lunev | ae22120 | 2008-01-10 03:52:35 -0800 | [diff] [blame] | 918 | return seq_open_net(inode, file, &arp_seq_ops, |
| 919 | sizeof(struct clip_seq_state)); |
Eric W. Biederman | 426b530 | 2008-01-24 00:13:18 -0800 | [diff] [blame] | 920 | } |
| 921 | |
Arjan van de Ven | 9a32144 | 2007-02-12 00:55:35 -0800 | [diff] [blame] | 922 | static const struct file_operations arp_seq_fops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | .open = arp_seq_open, |
| 924 | .read = seq_read, |
| 925 | .llseek = seq_lseek, |
Denis V. Lunev | ae22120 | 2008-01-10 03:52:35 -0800 | [diff] [blame] | 926 | .release = seq_release_net, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | .owner = THIS_MODULE |
| 928 | }; |
| 929 | #endif |
| 930 | |
Wang Chen | dbee0d3 | 2008-03-23 21:45:36 -0700 | [diff] [blame] | 931 | static void atm_clip_exit_noproc(void); |
| 932 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 933 | static int __init atm_clip_init(void) |
| 934 | { |
Simon Kelley | bd89efc | 2006-05-12 14:56:08 -0700 | [diff] [blame] | 935 | neigh_table_init_no_netlink(&clip_tbl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | |
| 937 | clip_tbl_hook = &clip_tbl; |
| 938 | register_atm_ioctl(&clip_ioctl_ops); |
Stephen Hemminger | f3a0592 | 2006-04-14 15:07:27 -0700 | [diff] [blame] | 939 | register_netdevice_notifier(&clip_dev_notifier); |
| 940 | register_inetaddr_notifier(&clip_inet_notifier); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | |
Stephen Hemminger | 2d90739 | 2006-04-14 15:56:02 -0700 | [diff] [blame] | 942 | setup_timer(&idle_timer, idle_timer_check, 0); |
| 943 | |
Adrian Bunk | 2478173 | 2006-07-09 12:13:18 -0700 | [diff] [blame] | 944 | #ifdef CONFIG_PROC_FS |
| 945 | { |
| 946 | struct proc_dir_entry *p; |
| 947 | |
Wang Chen | 16e297b | 2008-02-28 13:55:45 -0800 | [diff] [blame] | 948 | p = proc_create("arp", S_IRUGO, atm_proc_root, &arp_seq_fops); |
Wang Chen | dbee0d3 | 2008-03-23 21:45:36 -0700 | [diff] [blame] | 949 | if (!p) { |
Joe Perches | 9982446 | 2010-01-26 11:40:00 +0000 | [diff] [blame] | 950 | pr_err("Unable to initialize /proc/net/atm/arp\n"); |
Wang Chen | dbee0d3 | 2008-03-23 21:45:36 -0700 | [diff] [blame] | 951 | atm_clip_exit_noproc(); |
| 952 | return -ENOMEM; |
| 953 | } |
Adrian Bunk | 2478173 | 2006-07-09 12:13:18 -0700 | [diff] [blame] | 954 | } |
| 955 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | |
| 957 | return 0; |
| 958 | } |
| 959 | |
Wang Chen | dbee0d3 | 2008-03-23 21:45:36 -0700 | [diff] [blame] | 960 | static void atm_clip_exit_noproc(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | { |
| 962 | struct net_device *dev, *next; |
| 963 | |
Stephen Hemminger | f3a0592 | 2006-04-14 15:07:27 -0700 | [diff] [blame] | 964 | unregister_inetaddr_notifier(&clip_inet_notifier); |
| 965 | unregister_netdevice_notifier(&clip_dev_notifier); |
| 966 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | deregister_atm_ioctl(&clip_ioctl_ops); |
| 968 | |
| 969 | /* First, stop the idle timer, so it stops banging |
| 970 | * on the table. |
| 971 | */ |
Stephen Hemminger | 2d90739 | 2006-04-14 15:56:02 -0700 | [diff] [blame] | 972 | del_timer_sync(&idle_timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | |
| 974 | /* Next, purge the table, so that the device |
| 975 | * unregister loop below does not hang due to |
| 976 | * device references remaining in the table. |
| 977 | */ |
| 978 | neigh_ifdown(&clip_tbl, NULL); |
| 979 | |
| 980 | dev = clip_devs; |
| 981 | while (dev) { |
| 982 | next = PRIV(dev)->next; |
| 983 | unregister_netdev(dev); |
| 984 | free_netdev(dev); |
| 985 | dev = next; |
| 986 | } |
| 987 | |
| 988 | /* Now it is safe to fully shutdown whole table. */ |
| 989 | neigh_table_clear(&clip_tbl); |
| 990 | |
| 991 | clip_tbl_hook = NULL; |
| 992 | } |
| 993 | |
Wang Chen | dbee0d3 | 2008-03-23 21:45:36 -0700 | [diff] [blame] | 994 | static void __exit atm_clip_exit(void) |
| 995 | { |
| 996 | remove_proc_entry("arp", atm_proc_root); |
| 997 | |
| 998 | atm_clip_exit_noproc(); |
| 999 | } |
| 1000 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1001 | module_init(atm_clip_init); |
| 1002 | module_exit(atm_clip_exit); |
Stephen Hemminger | 4909e488 | 2006-04-14 16:01:26 -0700 | [diff] [blame] | 1003 | MODULE_AUTHOR("Werner Almesberger"); |
| 1004 | MODULE_DESCRIPTION("Classical/IP over ATM interface"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1005 | MODULE_LICENSE("GPL"); |