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Message-ID: <4AD68D4C.2080108@gmail.com>
Date: Thu, 15 Oct 2009 04:47:40 +0200
From: Eric Dumazet <eric.dumazet@...il.com>
To: "David S. Miller" <davem@...emloft.net>
CC: Linux Netdev List <netdev@...r.kernel.org>
Subject: [PATCH net-next-2.6] net: sk_drops consolidation
sock_queue_rcv_skb() can update sk_drops itself, removing need for
callers to take care of it. This is more consistent since
sock_queue_rcv_skb() also reads sk_drops when queueing a skb.
This adds sk_drops managment to many protocols that not cared yet.
Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
---
net/core/sock.c | 15 +++++++--------
net/ieee802154/dgram.c | 1 -
net/ieee802154/raw.c | 1 -
net/ipv4/raw.c | 1 -
net/ipv4/udp.c | 19 ++++++++-----------
net/ipv6/raw.c | 3 +--
net/ipv6/udp.c | 6 ++----
net/phonet/datagram.c | 6 ++----
net/phonet/pep.c | 2 --
9 files changed, 20 insertions(+), 34 deletions(-)
diff --git a/net/core/sock.c b/net/core/sock.c
index 43ca2c9..38713aa 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -274,7 +274,7 @@ static void sock_disable_timestamp(struct sock *sk, int flag)
int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
- int err = 0;
+ int err;
int skb_len;
unsigned long flags;
struct sk_buff_head *list = &sk->sk_receive_queue;
@@ -284,17 +284,17 @@ int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
*/
if (atomic_read(&sk->sk_rmem_alloc) + skb->truesize >=
(unsigned)sk->sk_rcvbuf) {
- err = -ENOMEM;
- goto out;
+ atomic_inc(&sk->sk_drops);
+ return -ENOMEM;
}
err = sk_filter(sk, skb);
if (err)
- goto out;
+ return err;
if (!sk_rmem_schedule(sk, skb->truesize)) {
- err = -ENOBUFS;
- goto out;
+ atomic_inc(&sk->sk_drops);
+ return -ENOBUFS;
}
skb->dev = NULL;
@@ -314,8 +314,7 @@ int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
if (!sock_flag(sk, SOCK_DEAD))
sk->sk_data_ready(sk, skb_len);
-out:
- return err;
+ return 0;
}
EXPORT_SYMBOL(sock_queue_rcv_skb);
diff --git a/net/ieee802154/dgram.c b/net/ieee802154/dgram.c
index 25ad956..9aac5ae 100644
--- a/net/ieee802154/dgram.c
+++ b/net/ieee802154/dgram.c
@@ -318,7 +318,6 @@ out:
static int dgram_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
if (sock_queue_rcv_skb(sk, skb) < 0) {
- atomic_inc(&sk->sk_drops);
kfree_skb(skb);
return NET_RX_DROP;
}
diff --git a/net/ieee802154/raw.c b/net/ieee802154/raw.c
index 769c8d1..9c9b85c 100644
--- a/net/ieee802154/raw.c
+++ b/net/ieee802154/raw.c
@@ -206,7 +206,6 @@ out:
static int raw_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
if (sock_queue_rcv_skb(sk, skb) < 0) {
- atomic_inc(&sk->sk_drops);
kfree_skb(skb);
return NET_RX_DROP;
}
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index f18172b..39e2a6b 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -292,7 +292,6 @@ static int raw_rcv_skb(struct sock * sk, struct sk_buff * skb)
/* Charge it to the socket. */
if (sock_queue_rcv_skb(sk, skb) < 0) {
- atomic_inc(&sk->sk_drops);
kfree_skb(skb);
return NET_RX_DROP;
}
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index ee61b3f..45a8a7e 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1063,25 +1063,22 @@ EXPORT_SYMBOL(udp_lib_unhash);
static int __udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
- int is_udplite = IS_UDPLITE(sk);
- int rc;
+ int rc = sock_queue_rcv_skb(sk, skb);
+
+ if (rc < 0) {
+ int is_udplite = IS_UDPLITE(sk);
- if ((rc = sock_queue_rcv_skb(sk, skb)) < 0) {
/* Note that an ENOMEM error is charged twice */
- if (rc == -ENOMEM) {
+ if (rc == -ENOMEM)
UDP_INC_STATS_BH(sock_net(sk), UDP_MIB_RCVBUFERRORS,
is_udplite);
- atomic_inc(&sk->sk_drops);
- }
- goto drop;
+ UDP_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
+ kfree_skb(skb);
+ return -1;
}
return 0;
-drop:
- UDP_INC_STATS_BH(sock_net(sk), UDP_MIB_INERRORS, is_udplite);
- kfree_skb(skb);
- return -1;
}
/* returns:
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index d8375bc..fd737ef 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -381,8 +381,7 @@ static inline int rawv6_rcv_skb(struct sock * sk, struct sk_buff * skb)
}
/* Charge it to the socket. */
- if (sock_queue_rcv_skb(sk,skb)<0) {
- atomic_inc(&sk->sk_drops);
+ if (sock_queue_rcv_skb(sk, skb) < 0) {
kfree_skb(skb);
return NET_RX_DROP;
}
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 1f8e2af..b86425b 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -385,13 +385,11 @@ int udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb)
goto drop;
}
- if ((rc = sock_queue_rcv_skb(sk,skb)) < 0) {
+ if ((rc = sock_queue_rcv_skb(sk, skb)) < 0) {
/* Note that an ENOMEM error is charged twice */
- if (rc == -ENOMEM) {
+ if (rc == -ENOMEM)
UDP6_INC_STATS_BH(sock_net(sk),
UDP_MIB_RCVBUFERRORS, is_udplite);
- atomic_inc(&sk->sk_drops);
- }
goto drop;
}
diff --git a/net/phonet/datagram.c b/net/phonet/datagram.c
index ef5c75c..67f072e 100644
--- a/net/phonet/datagram.c
+++ b/net/phonet/datagram.c
@@ -159,11 +159,9 @@ out_nofree:
static int pn_backlog_rcv(struct sock *sk, struct sk_buff *skb)
{
int err = sock_queue_rcv_skb(sk, skb);
- if (err < 0) {
+
+ if (err < 0)
kfree_skb(skb);
- if (err == -ENOMEM)
- atomic_inc(&sk->sk_drops);
- }
return err ? NET_RX_DROP : NET_RX_SUCCESS;
}
diff --git a/net/phonet/pep.c b/net/phonet/pep.c
index 5f32d21..cbaa1d6 100644
--- a/net/phonet/pep.c
+++ b/net/phonet/pep.c
@@ -360,8 +360,6 @@ static int pipe_do_rcv(struct sock *sk, struct sk_buff *skb)
err = sock_queue_rcv_skb(sk, skb);
if (!err)
return 0;
- if (err == -ENOMEM)
- atomic_inc(&sk->sk_drops);
break;
}
--
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