diff --git a/Documentation/networking/ip-sysctl.txt b/Documentation/networking/ip-sysctl.txt
index f049a1ca186fbf6eb5e55ed9eb3a65bb8601b1f8..b8867061fce4019b88e55b5fad5496044f0d682d 100644
--- a/Documentation/networking/ip-sysctl.txt
+++ b/Documentation/networking/ip-sysctl.txt
@@ -31,6 +31,16 @@ neigh/default/gc_thresh3 - INTEGER
when using large numbers of interfaces and when communicating
with large numbers of directly-connected peers.
+neigh/default/unres_qlen_bytes - INTEGER
+ The maximum number of bytes which may be used by packets
+ queued for each unresolved address by other network layers.
+ (added in linux 3.3)
+
+neigh/default/unres_qlen - INTEGER
+ The maximum number of packets which may be queued for each
+ unresolved address by other network layers.
+ (deprecated in linux 3.3) : use unres_qlen_bytes instead.
+
mtu_expires - INTEGER
Time, in seconds, that cached PMTU information is kept.
diff --git a/include/linux/neighbour.h b/include/linux/neighbour.h
index a7003b7a695d26ac366ae9204349c87ea358b0d3..b188f68a08c90bf8689ea784e618378aa5c9e978 100644
--- a/include/linux/neighbour.h
+++ b/include/linux/neighbour.h
@@ -116,6 +116,7 @@ enum {
NDTPA_PROXY_DELAY, /* u64, msecs */
NDTPA_PROXY_QLEN, /* u32 */
NDTPA_LOCKTIME, /* u64, msecs */
+ NDTPA_QUEUE_LENBYTES, /* u32 */
__NDTPA_MAX
};
#define NDTPA_MAX (__NDTPA_MAX - 1)
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 2720884287c3e72e34786a58522d0ee020957c87..7ae5acff96e9b42456e53cea5f86a98d9864dfd9 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -59,7 +59,7 @@ struct neigh_parms {
int reachable_time;
int delay_probe_time;
- int queue_len;
+ int queue_len_bytes;
int ucast_probes;
int app_probes;
int mcast_probes;
@@ -99,6 +99,7 @@ struct neighbour {
rwlock_t lock;
atomic_t refcnt;
struct sk_buff_head arp_queue;
+ unsigned int arp_queue_len_bytes;
struct timer_list timer;
unsigned long used;
atomic_t probes;
diff --git a/net/atm/clip.c b/net/atm/clip.c
index 852394072fa151956cec3e819da113024fbb6971..32c41b8a803e476c300df56756dfc43d45b094d9 100644
--- a/net/atm/clip.c
+++ b/net/atm/clip.c
@@ -329,7 +329,7 @@ static struct neigh_table clip_tbl = {
.gc_staletime = 60 * HZ,
.reachable_time = 30 * HZ,
.delay_probe_time = 5 * HZ,
- .queue_len = 3,
+ .queue_len_bytes = 64 * 1024,
.ucast_probes = 3,
.mcast_probes = 3,
.anycast_delay = 1 * HZ,
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 039d51e6c284e7ab655319d399b9d40060357dcf..2684794458ca00ff1476e178115fed5a6f56e2b0 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -238,6 +238,7 @@ static void neigh_flush_dev(struct neigh_table *tbl, struct net_device *dev)
it to safe state.
*/
skb_queue_purge(&n->arp_queue);
+ n->arp_queue_len_bytes = 0;
n->output = neigh_blackhole;
if (n->nud_state & NUD_VALID)
n->nud_state = NUD_NOARP;
@@ -702,6 +703,7 @@ void neigh_destroy(struct neighbour *neigh)
printk(KERN_WARNING "Impossible event.\n");
skb_queue_purge(&neigh->arp_queue);
+ neigh->arp_queue_len_bytes = 0;
dev_put(neigh->dev);
neigh_parms_put(neigh->parms);
@@ -842,6 +844,7 @@ static void neigh_invalidate(struct neighbour *neigh)
write_lock(&neigh->lock);
}
skb_queue_purge(&neigh->arp_queue);
+ neigh->arp_queue_len_bytes = 0;
}
static void neigh_probe(struct neighbour *neigh)
@@ -980,15 +983,20 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
if (neigh->nud_state == NUD_INCOMPLETE) {
if (skb) {
- if (skb_queue_len(&neigh->arp_queue) >=
- neigh->parms->queue_len) {
+ while (neigh->arp_queue_len_bytes + skb->truesize >
+ neigh->parms->queue_len_bytes) {
struct sk_buff *buff;
+
buff = __skb_dequeue(&neigh->arp_queue);
+ if (!buff)
+ break;
+ neigh->arp_queue_len_bytes -= buff->truesize;
kfree_skb(buff);
NEIGH_CACHE_STAT_INC(neigh->tbl, unres_discards);
}
skb_dst_force(skb);
__skb_queue_tail(&neigh->arp_queue, skb);
+ neigh->arp_queue_len_bytes += skb->truesize;
}
rc = 1;
}
@@ -1175,6 +1183,7 @@ int neigh_update(struct neighbour *neigh, const u8 *lladdr, u8 new,
write_lock_bh(&neigh->lock);
}
skb_queue_purge(&neigh->arp_queue);
+ neigh->arp_queue_len_bytes = 0;
}
out:
if (update_isrouter) {
@@ -1747,7 +1756,11 @@ static int neightbl_fill_parms(struct sk_buff *skb, struct neigh_parms *parms)
NLA_PUT_U32(skb, NDTPA_IFINDEX, parms->dev->ifindex);
NLA_PUT_U32(skb, NDTPA_REFCNT, atomic_read(&parms->refcnt));
- NLA_PUT_U32(skb, NDTPA_QUEUE_LEN, parms->queue_len);
+ NLA_PUT_U32(skb, NDTPA_QUEUE_LENBYTES, parms->queue_len_bytes);
+ /* approximative value for deprecated QUEUE_LEN (in packets) */
+ NLA_PUT_U32(skb, NDTPA_QUEUE_LEN,
+ DIV_ROUND_UP(parms->queue_len_bytes,
+ SKB_TRUESIZE(ETH_FRAME_LEN)));
NLA_PUT_U32(skb, NDTPA_PROXY_QLEN, parms->proxy_qlen);
NLA_PUT_U32(skb, NDTPA_APP_PROBES, parms->app_probes);
NLA_PUT_U32(skb, NDTPA_UCAST_PROBES, parms->ucast_probes);
@@ -1974,7 +1987,11 @@ static int neightbl_set(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg)
switch (i) {
case NDTPA_QUEUE_LEN:
- p->queue_len = nla_get_u32(tbp[i]);
+ p->queue_len_bytes = nla_get_u32(tbp[i]) *
+ SKB_TRUESIZE(ETH_FRAME_LEN);
+ break;
+ case NDTPA_QUEUE_LENBYTES:
+ p->queue_len_bytes = nla_get_u32(tbp[i]);
break;
case NDTPA_PROXY_QLEN:
p->proxy_qlen = nla_get_u32(tbp[i]);
@@ -2635,117 +2652,158 @@ EXPORT_SYMBOL(neigh_app_ns);
#ifdef CONFIG_SYSCTL
-#define NEIGH_VARS_MAX 19
+static int proc_unres_qlen(ctl_table *ctl, int write, void __user *buffer,
+ size_t *lenp, loff_t *ppos)
+{
+ int size, ret;
+ ctl_table tmp = *ctl;
+
+ tmp.data = &size;
+ size = DIV_ROUND_UP(*(int *)ctl->data, SKB_TRUESIZE(ETH_FRAME_LEN));
+ ret = proc_dointvec(&tmp, write, buffer, lenp, ppos);
+ if (write && !ret)
+ *(int *)ctl->data = size * SKB_TRUESIZE(ETH_FRAME_LEN);
+ return ret;
+}
+
+enum {
+ NEIGH_VAR_MCAST_PROBE,
+ NEIGH_VAR_UCAST_PROBE,
+ NEIGH_VAR_APP_PROBE,
+ NEIGH_VAR_RETRANS_TIME,
+ NEIGH_VAR_BASE_REACHABLE_TIME,
+ NEIGH_VAR_DELAY_PROBE_TIME,
+ NEIGH_VAR_GC_STALETIME,
+ NEIGH_VAR_QUEUE_LEN,
+ NEIGH_VAR_QUEUE_LEN_BYTES,
+ NEIGH_VAR_PROXY_QLEN,
+ NEIGH_VAR_ANYCAST_DELAY,
+ NEIGH_VAR_PROXY_DELAY,
+ NEIGH_VAR_LOCKTIME,
+ NEIGH_VAR_RETRANS_TIME_MS,
+ NEIGH_VAR_BASE_REACHABLE_TIME_MS,
+ NEIGH_VAR_GC_INTERVAL,
+ NEIGH_VAR_GC_THRESH1,
+ NEIGH_VAR_GC_THRESH2,
+ NEIGH_VAR_GC_THRESH3,
+ NEIGH_VAR_MAX
+};
static struct neigh_sysctl_table {
struct ctl_table_header *sysctl_header;
- struct ctl_table neigh_vars[NEIGH_VARS_MAX];
+ struct ctl_table neigh_vars[NEIGH_VAR_MAX + 1];
char *dev_name;
} neigh_sysctl_template __read_mostly = {
.neigh_vars = {
- {
+ [NEIGH_VAR_MCAST_PROBE] = {
.procname = "mcast_solicit",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
- {
+ [NEIGH_VAR_UCAST_PROBE] = {
.procname = "ucast_solicit",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
- {
+ [NEIGH_VAR_APP_PROBE] = {
.procname = "app_solicit",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
- {
+ [NEIGH_VAR_RETRANS_TIME] = {
.procname = "retrans_time",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_userhz_jiffies,
},
- {
+ [NEIGH_VAR_BASE_REACHABLE_TIME] = {
.procname = "base_reachable_time",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
- {
+ [NEIGH_VAR_DELAY_PROBE_TIME] = {
.procname = "delay_first_probe_time",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
- {
+ [NEIGH_VAR_GC_STALETIME] = {
.procname = "gc_stale_time",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
- {
+ [NEIGH_VAR_QUEUE_LEN] = {
.procname = "unres_qlen",
.maxlen = sizeof(int),
.mode = 0644,
+ .proc_handler = proc_unres_qlen,
+ },
+ [NEIGH_VAR_QUEUE_LEN_BYTES] = {
+ .procname = "unres_qlen_bytes",
+ .maxlen = sizeof(int),
+ .mode = 0644,
.proc_handler = proc_dointvec,
},
- {
+ [NEIGH_VAR_PROXY_QLEN] = {
.procname = "proxy_qlen",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
- {
+ [NEIGH_VAR_ANYCAST_DELAY] = {
.procname = "anycast_delay",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_userhz_jiffies,
},
- {
+ [NEIGH_VAR_PROXY_DELAY] = {
.procname = "proxy_delay",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_userhz_jiffies,
},
- {
+ [NEIGH_VAR_LOCKTIME] = {
.procname = "locktime",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_userhz_jiffies,
},
- {
+ [NEIGH_VAR_RETRANS_TIME_MS] = {
.procname = "retrans_time_ms",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_ms_jiffies,
},
- {
+ [NEIGH_VAR_BASE_REACHABLE_TIME_MS] = {
.procname = "base_reachable_time_ms",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_ms_jiffies,
},
- {
+ [NEIGH_VAR_GC_INTERVAL] = {
.procname = "gc_interval",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_jiffies,
},
- {
+ [NEIGH_VAR_GC_THRESH1] = {
.procname = "gc_thresh1",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
- {
+ [NEIGH_VAR_GC_THRESH2] = {
.procname = "gc_thresh2",
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec,
},
- {
+ [NEIGH_VAR_GC_THRESH3] = {
.procname = "gc_thresh3",
.maxlen = sizeof(int),
.mode = 0644,
@@ -2778,47 +2836,49 @@ int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p,
if (!t)
goto err;
- t->neigh_vars[0].data = &p->mcast_probes;
- t->neigh_vars[1].data = &p->ucast_probes;
- t->neigh_vars[2].data = &p->app_probes;
- t->neigh_vars[3].data = &p->retrans_time;
- t->neigh_vars[4].data = &p->base_reachable_time;
- t->neigh_vars[5].data = &p->delay_probe_time;
- t->neigh_vars[6].data = &p->gc_staletime;
- t->neigh_vars[7].data = &p->queue_len;
- t->neigh_vars[8].data = &p->proxy_qlen;
- t->neigh_vars[9].data = &p->anycast_delay;
- t->neigh_vars[10].data = &p->proxy_delay;
- t->neigh_vars[11].data = &p->locktime;
- t->neigh_vars[12].data = &p->retrans_time;
- t->neigh_vars[13].data = &p->base_reachable_time;
+ t->neigh_vars[NEIGH_VAR_MCAST_PROBE].data = &p->mcast_probes;
+ t->neigh_vars[NEIGH_VAR_UCAST_PROBE].data = &p->ucast_probes;
+ t->neigh_vars[NEIGH_VAR_APP_PROBE].data = &p->app_probes;
+ t->neigh_vars[NEIGH_VAR_RETRANS_TIME].data = &p->retrans_time;
+ t->neigh_vars[NEIGH_VAR_BASE_REACHABLE_TIME].data = &p->base_reachable_time;
+ t->neigh_vars[NEIGH_VAR_DELAY_PROBE_TIME].data = &p->delay_probe_time;
+ t->neigh_vars[NEIGH_VAR_GC_STALETIME].data = &p->gc_staletime;
+ t->neigh_vars[NEIGH_VAR_QUEUE_LEN].data = &p->queue_len_bytes;
+ t->neigh_vars[NEIGH_VAR_QUEUE_LEN_BYTES].data = &p->queue_len_bytes;
+ t->neigh_vars[NEIGH_VAR_PROXY_QLEN].data = &p->proxy_qlen;
+ t->neigh_vars[NEIGH_VAR_ANYCAST_DELAY].data = &p->anycast_delay;
+ t->neigh_vars[NEIGH_VAR_PROXY_DELAY].data = &p->proxy_delay;
+ t->neigh_vars[NEIGH_VAR_LOCKTIME].data = &p->locktime;
+ t->neigh_vars[NEIGH_VAR_RETRANS_TIME_MS].data = &p->retrans_time;
+ t->neigh_vars[NEIGH_VAR_BASE_REACHABLE_TIME_MS].data = &p->base_reachable_time;
if (dev) {
dev_name_source = dev->name;
/* Terminate the table early */
- memset(&t->neigh_vars[14], 0, sizeof(t->neigh_vars[14]));
+ memset(&t->neigh_vars[NEIGH_VAR_GC_INTERVAL], 0,
+ sizeof(t->neigh_vars[NEIGH_VAR_GC_INTERVAL]));
} else {
dev_name_source = neigh_path[NEIGH_CTL_PATH_DEV].procname;
- t->neigh_vars[14].data = (int *)(p + 1);
- t->neigh_vars[15].data = (int *)(p + 1) + 1;
- t->neigh_vars[16].data = (int *)(p + 1) + 2;
- t->neigh_vars[17].data = (int *)(p + 1) + 3;
+ t->neigh_vars[NEIGH_VAR_GC_INTERVAL].data = (int *)(p + 1);
+ t->neigh_vars[NEIGH_VAR_GC_THRESH1].data = (int *)(p + 1) + 1;
+ t->neigh_vars[NEIGH_VAR_GC_THRESH2].data = (int *)(p + 1) + 2;
+ t->neigh_vars[NEIGH_VAR_GC_THRESH3].data = (int *)(p + 1) + 3;
}
if (handler) {
/* RetransTime */
- t->neigh_vars[3].proc_handler = handler;
- t->neigh_vars[3].extra1 = dev;
+ t->neigh_vars[NEIGH_VAR_RETRANS_TIME].proc_handler = handler;
+ t->neigh_vars[NEIGH_VAR_RETRANS_TIME].extra1 = dev;
/* ReachableTime */
- t->neigh_vars[4].proc_handler = handler;
- t->neigh_vars[4].extra1 = dev;
+ t->neigh_vars[NEIGH_VAR_BASE_REACHABLE_TIME].proc_handler = handler;
+ t->neigh_vars[NEIGH_VAR_BASE_REACHABLE_TIME].extra1 = dev;
/* RetransTime (in milliseconds)*/
- t->neigh_vars[12].proc_handler = handler;
- t->neigh_vars[12].extra1 = dev;
+ t->neigh_vars[NEIGH_VAR_RETRANS_TIME_MS].proc_handler = handler;
+ t->neigh_vars[NEIGH_VAR_RETRANS_TIME_MS].extra1 = dev;
/* ReachableTime (in milliseconds) */
- t->neigh_vars[13].proc_handler = handler;
- t->neigh_vars[13].extra1 = dev;
+ t->neigh_vars[NEIGH_VAR_BASE_REACHABLE_TIME_MS].proc_handler = handler;
+ t->neigh_vars[NEIGH_VAR_BASE_REACHABLE_TIME_MS].extra1 = dev;
}
t->dev_name = kstrdup(dev_name_source, GFP_KERNEL);
diff --git a/net/decnet/dn_neigh.c b/net/decnet/dn_neigh.c
index 7f0eb087dc116390ebb67aca72295f95d24dcde3..3532ac64c82db980f59a626cda4529a861c1075a 100644
--- a/net/decnet/dn_neigh.c
+++ b/net/decnet/dn_neigh.c
@@ -107,7 +107,7 @@ struct neigh_table dn_neigh_table = {
.gc_staletime = 60 * HZ,
.reachable_time = 30 * HZ,
.delay_probe_time = 5 * HZ,
- .queue_len = 3,
+ .queue_len_bytes = 64*1024,
.ucast_probes = 0,
.app_probes = 0,
.mcast_probes = 0,
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index 96a164aa1367b9c4f48f58c860b4e785261dbd9c..d732827b32b9c617b3e5f8a0ae065a57557c9f4f 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -177,7 +177,7 @@ struct neigh_table arp_tbl = {
.gc_staletime = 60 * HZ,
.reachable_time = 30 * HZ,
.delay_probe_time = 5 * HZ,
- .queue_len = 3,
+ .queue_len_bytes = 64*1024,
.ucast_probes = 3,
.mcast_probes = 3,
.anycast_delay = 1 * HZ,
diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 44e5b7f2a6c1badcbf4dbb5ed2a844ae2daa199c..4a2098222625ecc271999a4ea86725a16592fd97 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -141,7 +141,7 @@ struct neigh_table nd_tbl = {
.gc_staletime = 60 * HZ,
.reachable_time = ND_REACHABLE_TIME,
.delay_probe_time = 5 * HZ,
- .queue_len = 3,
+ .queue_len_bytes = 64*1024,
.ucast_probes = 3,
.mcast_probes = 3,
.anycast_delay = 1 * HZ,