From 32092ecf0644e91070f9eff4f6e1edda8f90aecc Mon Sep 17 00:00:00 2001 From: David Miller Date: Mon, 25 Jul 2011 00:01:41 +0000 Subject: [PATCH] atm: clip: Use device neigh support on top of "arp_tbl". Instead of instantiating an entire new neigh_table instance just for ATM handling, use the neigh device private facility. Signed-off-by: David S. Miller --- include/net/atmclip.h | 5 --- net/atm/clip.c | 86 +++++++++------------------------------------------ net/ipv4/arp.c | 5 --- net/ipv4/route.c | 10 ++---- 4 files changed, 16 insertions(+), 90 deletions(-) diff --git a/include/net/atmclip.h b/include/net/atmclip.h index 852a3b2..5865924 100644 --- a/include/net/atmclip.h +++ b/include/net/atmclip.h @@ -41,17 +41,12 @@ struct atmarp_entry { struct neighbour *neigh; /* neighbour back-pointer */ }; - #define PRIV(dev) ((struct clip_priv *) netdev_priv(dev)) - struct clip_priv { int number; /* for convenience ... */ spinlock_t xoff_lock; /* ensures that pop is atomic (SMP) */ struct net_device *next; /* next CLIP interface */ }; - -extern struct neigh_table *clip_tbl_hook; - #endif diff --git a/net/atm/clip.c b/net/atm/clip.c index a9d3484..f3b3615 100644 --- a/net/atm/clip.c +++ b/net/atm/clip.c @@ -33,6 +33,7 @@ #include #include /* for struct rtable and routing */ #include /* icmp_send */ +#include #include /* for HZ */ #include #include /* for htons etc. */ @@ -287,70 +288,23 @@ static const struct neigh_ops clip_neigh_ops = { static int clip_constructor(struct neighbour *neigh) { struct atmarp_entry *entry = neighbour_priv(neigh); - struct net_device *dev = neigh->dev; - struct in_device *in_dev; - struct neigh_parms *parms; - pr_debug("(neigh %p, entry %p)\n", neigh, entry); - neigh->type = inet_addr_type(&init_net, *((__be32 *) neigh->primary_key)); - if (neigh->type != RTN_UNICAST) + if (neigh->tbl->family != AF_INET) return -EINVAL; - rcu_read_lock(); - in_dev = __in_dev_get_rcu(dev); - if (!in_dev) { - rcu_read_unlock(); + if (neigh->type != RTN_UNICAST) return -EINVAL; - } - - parms = in_dev->arp_parms; - __neigh_parms_put(neigh->parms); - neigh->parms = neigh_parms_clone(parms); - rcu_read_unlock(); + neigh->nud_state = NUD_NONE; neigh->ops = &clip_neigh_ops; - neigh->output = neigh->nud_state & NUD_VALID ? - neigh->ops->connected_output : neigh->ops->output; + neigh->output = neigh->ops->output; entry->neigh = neigh; entry->vccs = NULL; entry->expires = jiffies - 1; + return 0; } -static u32 clip_hash(const void *pkey, const struct net_device *dev, __u32 rnd) -{ - return jhash_2words(*(u32 *) pkey, dev->ifindex, rnd); -} - -static struct neigh_table clip_tbl = { - .family = AF_INET, - .key_len = 4, - .hash = clip_hash, - .constructor = clip_constructor, - .id = "clip_arp_cache", - - /* parameters are copied from ARP ... */ - .parms = { - .tbl = &clip_tbl, - .base_reachable_time = 30 * HZ, - .retrans_time = 1 * HZ, - .gc_staletime = 60 * HZ, - .reachable_time = 30 * HZ, - .delay_probe_time = 5 * HZ, - .queue_len_bytes = 64 * 1024, - .ucast_probes = 3, - .mcast_probes = 3, - .anycast_delay = 1 * HZ, - .proxy_delay = (8 * HZ) / 10, - .proxy_qlen = 64, - .locktime = 1 * HZ, - }, - .gc_interval = 30 * HZ, - .gc_thresh1 = 128, - .gc_thresh2 = 512, - .gc_thresh3 = 1024, -}; - /* @@@ copy bh locking from arp.c -- need to bh-enable atm code before */ /* @@ -508,7 +462,7 @@ static int clip_setentry(struct atm_vcc *vcc, __be32 ip) rt = ip_route_output(&init_net, ip, 0, 1, 0); if (IS_ERR(rt)) return PTR_ERR(rt); - neigh = __neigh_lookup(&clip_tbl, &ip, rt->dst.dev, 1); + neigh = __neigh_lookup(&arp_tbl, &ip, rt->dst.dev, 1); ip_rt_put(rt); if (!neigh) return -ENOMEM; @@ -529,7 +483,8 @@ static int clip_setentry(struct atm_vcc *vcc, __be32 ip) } static const struct net_device_ops clip_netdev_ops = { - .ndo_start_xmit = clip_start_xmit, + .ndo_start_xmit = clip_start_xmit, + .ndo_neigh_construct = clip_constructor, }; static void clip_setup(struct net_device *dev) @@ -590,10 +545,8 @@ static int clip_device_event(struct notifier_block *this, unsigned long event, if (!net_eq(dev_net(dev), &init_net)) return NOTIFY_DONE; - if (event == NETDEV_UNREGISTER) { - neigh_ifdown(&clip_tbl, dev); + if (event == NETDEV_UNREGISTER) return NOTIFY_DONE; - } /* ignore non-CLIP devices */ if (dev->type != ARPHRD_ATM || dev->netdev_ops != &clip_netdev_ops) @@ -867,6 +820,9 @@ static void *clip_seq_sub_iter(struct neigh_seq_state *_state, { struct clip_seq_state *state = (struct clip_seq_state *)_state; + if (n->dev->type != ARPHRD_ATM) + return NULL; + return clip_seq_vcc_walk(state, neighbour_priv(n), pos); } @@ -874,7 +830,7 @@ static void *clip_seq_start(struct seq_file *seq, loff_t * pos) { struct clip_seq_state *state = seq->private; state->ns.neigh_sub_iter = clip_seq_sub_iter; - return neigh_seq_start(seq, pos, &clip_tbl, NEIGH_SEQ_NEIGH_ONLY); + return neigh_seq_start(seq, pos, &arp_tbl, NEIGH_SEQ_NEIGH_ONLY); } static int clip_seq_show(struct seq_file *seq, void *v) @@ -920,9 +876,6 @@ static void atm_clip_exit_noproc(void); static int __init atm_clip_init(void) { - neigh_table_init_no_netlink(&clip_tbl); - - clip_tbl_hook = &clip_tbl; register_atm_ioctl(&clip_ioctl_ops); register_netdevice_notifier(&clip_dev_notifier); register_inetaddr_notifier(&clip_inet_notifier); @@ -959,12 +912,6 @@ static void atm_clip_exit_noproc(void) */ del_timer_sync(&idle_timer); - /* Next, purge the table, so that the device - * unregister loop below does not hang due to - * device references remaining in the table. - */ - neigh_ifdown(&clip_tbl, NULL); - dev = clip_devs; while (dev) { next = PRIV(dev)->next; @@ -972,11 +919,6 @@ static void atm_clip_exit_noproc(void) free_netdev(dev); dev = next; } - - /* Now it is safe to fully shutdown whole table. */ - neigh_table_clear(&clip_tbl); - - clip_tbl_hook = NULL; } static void __exit atm_clip_exit(void) diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index fd4b3e8..ff324eb 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -112,11 +112,6 @@ #include #include #include -#if defined(CONFIG_ATM_CLIP) || defined(CONFIG_ATM_CLIP_MODULE) -#include -struct neigh_table *clip_tbl_hook; -EXPORT_SYMBOL(clip_tbl_hook); -#endif #include #include diff --git a/net/ipv4/route.c b/net/ipv4/route.c index fb47c8f..9a20663 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -108,7 +108,6 @@ #ifdef CONFIG_SYSCTL #include #endif -#include #include #define RT_FL_TOS(oldflp4) \ @@ -1013,23 +1012,18 @@ static int slow_chain_length(const struct rtable *head) static struct neighbour *ipv4_neigh_lookup(const struct dst_entry *dst, const void *daddr) { - struct neigh_table *tbl = &arp_tbl; static const __be32 inaddr_any = 0; struct net_device *dev = dst->dev; const __be32 *pkey = daddr; struct neighbour *n; -#if defined(CONFIG_ATM_CLIP) || defined(CONFIG_ATM_CLIP_MODULE) - if (dev->type == ARPHRD_ATM) - tbl = clip_tbl_hook; -#endif if (dev->flags & (IFF_LOOPBACK | IFF_POINTOPOINT)) pkey = &inaddr_any; - n = __ipv4_neigh_lookup(tbl, dev, *(__force u32 *)pkey); + n = __ipv4_neigh_lookup(&arp_tbl, dev, *(__force u32 *)pkey); if (n) return n; - return neigh_create(tbl, pkey, dev); + return neigh_create(&arp_tbl, pkey, dev); } static int rt_bind_neighbour(struct rtable *rt) -- 2.7.4