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-rw-r--r--net/ipv4/udp.c80
1 files changed, 46 insertions, 34 deletions
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 56fcda3694ba..383d17359d01 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -5,8 +5,6 @@
*
* The User Datagram Protocol (UDP).
*
- * Version: $Id: udp.c,v 1.102 2002/02/01 22:01:04 davem Exp $
- *
* Authors: Ross Biro
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
* Arnt Gulbrandsen, <agulbra@nvg.unit.no>
@@ -110,9 +108,6 @@
* Snmp MIB for the UDP layer
*/
-DEFINE_SNMP_STAT(struct udp_mib, udp_statistics) __read_mostly;
-EXPORT_SYMBOL(udp_statistics);
-
DEFINE_SNMP_STAT(struct udp_mib, udp_stats_in6) __read_mostly;
EXPORT_SYMBOL(udp_stats_in6);
@@ -136,7 +131,7 @@ static inline int __udp_lib_lport_inuse(struct net *net, __u16 num,
struct sock *sk;
struct hlist_node *node;
- sk_for_each(sk, node, &udptable[num & (UDP_HTABLE_SIZE - 1)])
+ sk_for_each(sk, node, &udptable[udp_hashfn(net, num)])
if (net_eq(sock_net(sk), net) && sk->sk_hash == num)
return 1;
return 0;
@@ -176,7 +171,7 @@ int udp_lib_get_port(struct sock *sk, unsigned short snum,
for (i = 0; i < UDP_HTABLE_SIZE; i++) {
int size = 0;
- head = &udptable[rover & (UDP_HTABLE_SIZE - 1)];
+ head = &udptable[udp_hashfn(net, rover)];
if (hlist_empty(head))
goto gotit;
@@ -213,7 +208,7 @@ int udp_lib_get_port(struct sock *sk, unsigned short snum,
gotit:
snum = rover;
} else {
- head = &udptable[snum & (UDP_HTABLE_SIZE - 1)];
+ head = &udptable[udp_hashfn(net, snum)];
sk_for_each(sk2, node, head)
if (sk2->sk_hash == snum &&
@@ -229,7 +224,7 @@ gotit:
inet_sk(sk)->num = snum;
sk->sk_hash = snum;
if (sk_unhashed(sk)) {
- head = &udptable[snum & (UDP_HTABLE_SIZE - 1)];
+ head = &udptable[udp_hashfn(net, snum)];
sk_add_node(sk, head);
sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1);
}
@@ -266,7 +261,7 @@ static struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr,
int badness = -1;
read_lock(&udp_hash_lock);
- sk_for_each(sk, node, &udptable[hnum & (UDP_HTABLE_SIZE - 1)]) {
+ sk_for_each(sk, node, &udptable[udp_hashfn(net, hnum)]) {
struct inet_sock *inet = inet_sk(sk);
if (net_eq(sock_net(sk), net) && sk->sk_hash == hnum &&
@@ -356,11 +351,12 @@ void __udp4_lib_err(struct sk_buff *skb, u32 info, struct hlist_head udptable[])
struct sock *sk;
int harderr;
int err;
+ struct net *net = dev_net(skb->dev);
- sk = __udp4_lib_lookup(dev_net(skb->dev), iph->daddr, uh->dest,
+ sk = __udp4_lib_lookup(net, iph->daddr, uh->dest,
iph->saddr, uh->source, skb->dev->ifindex, udptable);
if (sk == NULL) {
- ICMP_INC_STATS_BH(ICMP_MIB_INERRORS);
+ ICMP_INC_STATS_BH(net, ICMP_MIB_INERRORS);
return; /* No socket for error */
}
@@ -528,7 +524,8 @@ out:
up->len = 0;
up->pending = 0;
if (!err)
- UDP_INC_STATS_USER(UDP_MIB_OUTDATAGRAMS, is_udplite);
+ UDP_INC_STATS_USER(sock_net(sk),
+ UDP_MIB_OUTDATAGRAMS, is_udplite);
return err;
}
@@ -656,11 +653,13 @@ int udp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
.uli_u = { .ports =
{ .sport = inet->sport,
.dport = dport } } };
+ struct net *net = sock_net(sk);
+
security_sk_classify_flow(sk, &fl);
- err = ip_route_output_flow(sock_net(sk), &rt, &fl, sk, 1);
+ err = ip_route_output_flow(net, &rt, &fl, sk, 1);
if (err) {
if (err == -ENETUNREACH)
- IP_INC_STATS_BH(IPSTATS_MIB_OUTNOROUTES);
+ IP_INC_STATS_BH(net, IPSTATS_MIB_OUTNOROUTES);
goto out;
}
@@ -727,7 +726,8 @@ out:
* seems like overkill.
*/
if (err == -ENOBUFS || test_bit(SOCK_NOSPACE, &sk->sk_socket->flags)) {
- UDP_INC_STATS_USER(UDP_MIB_SNDBUFERRORS, is_udplite);
+ UDP_INC_STATS_USER(sock_net(sk),
+ UDP_MIB_SNDBUFERRORS, is_udplite);
}
return err;
@@ -890,7 +890,8 @@ try_again:
goto out_free;
if (!peeked)
- UDP_INC_STATS_USER(UDP_MIB_INDATAGRAMS, is_udplite);
+ UDP_INC_STATS_USER(sock_net(sk),
+ UDP_MIB_INDATAGRAMS, is_udplite);
sock_recv_timestamp(msg, sk, skb);
@@ -919,7 +920,7 @@ out:
csum_copy_err:
lock_sock(sk);
if (!skb_kill_datagram(sk, skb, flags))
- UDP_INC_STATS_USER(UDP_MIB_INERRORS, is_udplite);
+ UDP_INC_STATS_USER(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
release_sock(sk);
if (noblock)
@@ -990,7 +991,8 @@ int udp_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
ret = (*up->encap_rcv)(sk, skb);
if (ret <= 0) {
- UDP_INC_STATS_BH(UDP_MIB_INDATAGRAMS,
+ UDP_INC_STATS_BH(sock_net(sk),
+ UDP_MIB_INDATAGRAMS,
is_udplite);
return -ret;
}
@@ -1042,15 +1044,18 @@ int udp_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
/* Note that an ENOMEM error is charged twice */
- if (rc == -ENOMEM)
- UDP_INC_STATS_BH(UDP_MIB_RCVBUFERRORS, is_udplite);
+ if (rc == -ENOMEM) {
+ UDP_INC_STATS_BH(sock_net(sk),
+ UDP_MIB_RCVBUFERRORS, is_udplite);
+ atomic_inc(&sk->sk_drops);
+ }
goto drop;
}
return 0;
drop:
- UDP_INC_STATS_BH(UDP_MIB_INERRORS, is_udplite);
+ UDP_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
kfree_skb(skb);
return -1;
}
@@ -1061,7 +1066,7 @@ drop:
* Note: called only from the BH handler context,
* so we don't need to lock the hashes.
*/
-static int __udp4_lib_mcast_deliver(struct sk_buff *skb,
+static int __udp4_lib_mcast_deliver(struct net *net, struct sk_buff *skb,
struct udphdr *uh,
__be32 saddr, __be32 daddr,
struct hlist_head udptable[])
@@ -1070,7 +1075,7 @@ static int __udp4_lib_mcast_deliver(struct sk_buff *skb,
int dif;
read_lock(&udp_hash_lock);
- sk = sk_head(&udptable[ntohs(uh->dest) & (UDP_HTABLE_SIZE - 1)]);
+ sk = sk_head(&udptable[udp_hashfn(net, ntohs(uh->dest))]);
dif = skb->dev->ifindex;
sk = udp_v4_mcast_next(sk, uh->dest, daddr, uh->source, saddr, dif);
if (sk) {
@@ -1158,6 +1163,7 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
struct rtable *rt = (struct rtable*)skb->dst;
__be32 saddr = ip_hdr(skb)->saddr;
__be32 daddr = ip_hdr(skb)->daddr;
+ struct net *net = dev_net(skb->dev);
/*
* Validate the packet.
@@ -1180,9 +1186,10 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
goto csum_error;
if (rt->rt_flags & (RTCF_BROADCAST|RTCF_MULTICAST))
- return __udp4_lib_mcast_deliver(skb, uh, saddr, daddr, udptable);
+ return __udp4_lib_mcast_deliver(net, skb, uh,
+ saddr, daddr, udptable);
- sk = __udp4_lib_lookup(dev_net(skb->dev), saddr, uh->source, daddr,
+ sk = __udp4_lib_lookup(net, saddr, uh->source, daddr,
uh->dest, inet_iif(skb), udptable);
if (sk != NULL) {
@@ -1211,7 +1218,7 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
if (udp_lib_checksum_complete(skb))
goto csum_error;
- UDP_INC_STATS_BH(UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE);
+ UDP_INC_STATS_BH(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE);
icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);
/*
@@ -1245,7 +1252,7 @@ csum_error:
ntohs(uh->dest),
ulen);
drop:
- UDP_INC_STATS_BH(UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE);
+ UDP_INC_STATS_BH(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE);
kfree_skb(skb);
return 0;
}
@@ -1255,12 +1262,11 @@ int udp_rcv(struct sk_buff *skb)
return __udp4_lib_rcv(skb, udp_hash, IPPROTO_UDP);
}
-int udp_destroy_sock(struct sock *sk)
+void udp_destroy_sock(struct sock *sk)
{
lock_sock(sk);
udp_flush_pending_frames(sk);
release_sock(sk);
- return 0;
}
/*
@@ -1319,6 +1325,8 @@ int udp_lib_setsockopt(struct sock *sk, int level, int optname,
return -ENOPROTOOPT;
if (val != 0 && val < 8) /* Illegal coverage: use default (8) */
val = 8;
+ else if (val > USHORT_MAX)
+ val = USHORT_MAX;
up->pcslen = val;
up->pcflag |= UDPLITE_SEND_CC;
break;
@@ -1331,6 +1339,8 @@ int udp_lib_setsockopt(struct sock *sk, int level, int optname,
return -ENOPROTOOPT;
if (val != 0 && val < 8) /* Avoid silly minimal values. */
val = 8;
+ else if (val > USHORT_MAX)
+ val = USHORT_MAX;
up->pcrlen = val;
up->pcflag |= UDPLITE_RECV_CC;
break;
@@ -1453,7 +1463,8 @@ unsigned int udp_poll(struct file *file, struct socket *sock, poll_table *wait)
spin_lock_bh(&rcvq->lock);
while ((skb = skb_peek(rcvq)) != NULL &&
udp_lib_checksum_complete(skb)) {
- UDP_INC_STATS_BH(UDP_MIB_INERRORS, is_lite);
+ UDP_INC_STATS_BH(sock_net(sk),
+ UDP_MIB_INERRORS, is_lite);
__skb_unlink(skb, rcvq);
kfree_skb(skb);
}
@@ -1629,12 +1640,13 @@ static void udp4_format_sock(struct sock *sp, struct seq_file *f,
__u16 srcp = ntohs(inet->sport);
seq_printf(f, "%4d: %08X:%04X %08X:%04X"
- " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p%n",
+ " %02X %08X:%08X %02X:%08lX %08X %5d %8d %lu %d %p %d%n",
bucket, src, srcp, dest, destp, sp->sk_state,
atomic_read(&sp->sk_wmem_alloc),
atomic_read(&sp->sk_rmem_alloc),
0, 0L, 0, sock_i_uid(sp), 0, sock_i_ino(sp),
- atomic_read(&sp->sk_refcnt), sp, len);
+ atomic_read(&sp->sk_refcnt), sp,
+ atomic_read(&sp->sk_drops), len);
}
int udp4_seq_show(struct seq_file *seq, void *v)
@@ -1643,7 +1655,7 @@ int udp4_seq_show(struct seq_file *seq, void *v)
seq_printf(seq, "%-127s\n",
" sl local_address rem_address st tx_queue "
"rx_queue tr tm->when retrnsmt uid timeout "
- "inode");
+ "inode ref pointer drops");
else {
struct udp_iter_state *state = seq->private;
int len;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 12:11:58 +0100