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[SOCK]: Introduce sk_receive_skb 

Its common enough to to justify that, TCP still can't use it as it has the
prequeueing stuff, still to be made generic in the not so distant future :-)

Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2005-12-27 02:42:22 -02:00 committed by David S. Miller
parent ce1d4d3e88
commit 25995ff577
5 changed files with 29 additions and 73 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/net/pppoe.c
View File

@ -383,8 +383,6 @@ static int pppoe_rcv(struct sk_buff *skb,
{
struct pppoe_hdr *ph;
struct pppox_sock *po;
struct sock *sk;
int ret;
if (!pskb_may_pull(skb, sizeof(struct pppoe_hdr)))
goto drop;
@ -395,24 +393,8 @@ static int pppoe_rcv(struct sk_buff *skb,
ph = (struct pppoe_hdr *) skb->nh.raw;
po = get_item((unsigned long) ph->sid, eth_hdr(skb)->h_source);
if (!po)
goto drop;
sk = sk_pppox(po);
bh_lock_sock(sk);
/* Socket state is unknown, must put skb into backlog. */
if (sock_owned_by_user(sk) != 0) {
sk_add_backlog(sk, skb);
ret = NET_RX_SUCCESS;
} else {
ret = pppoe_rcv_core(sk, skb);
}
bh_unlock_sock(sk);
sock_put(sk);
return ret;
if (po != NULL)
return sk_receive_skb(sk_pppox(po), skb);
drop:
kfree_skb(skb);
out:

23
include/net/sock.h
View File

@ -926,6 +926,29 @@ static inline void sock_put(struct sock *sk)
sk_free(sk);
}
static inline int sk_receive_skb(struct sock *sk, struct sk_buff *skb)
{
int rc = NET_RX_SUCCESS;
if (sk_filter(sk, skb, 0))
goto discard_and_relse;
skb->dev = NULL;
bh_lock_sock(sk);
if (!sock_owned_by_user(sk))
rc = sk->sk_backlog_rcv(sk, skb);
else
sk_add_backlog(sk, skb);
bh_unlock_sock(sk);
out:
sock_put(sk);
return rc;
discard_and_relse:
kfree_skb(skb);
goto out;
}
/* Detach socket from process context.
* Announce socket dead, detach it from wait queue and inode.
* Note that parent inode held reference count on this struct sock,

23
net/dccp/ipv4.c
View File

@ -914,7 +914,6 @@ int dccp_v4_rcv(struct sk_buff *skb)
{
const struct dccp_hdr *dh;
struct sock *sk;
int rc;
/* Step 1: Check header basics: */
@ -984,28 +983,10 @@ int dccp_v4_rcv(struct sk_buff *skb)
goto do_time_wait;
}
if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb)) {
dccp_pr_debug("xfrm4_policy_check failed\n");
if (!xfrm4_policy_check(sk, XFRM_POLICY_IN, skb))
goto discard_and_relse;
}
if (sk_filter(sk, skb, 0)) {
dccp_pr_debug("sk_filter failed\n");
goto discard_and_relse;
}
skb->dev = NULL;
bh_lock_sock(sk);
rc = 0;
if (!sock_owned_by_user(sk))
rc = dccp_v4_do_rcv(sk, skb);
else
sk_add_backlog(sk, skb);
bh_unlock_sock(sk);
sock_put(sk);
return rc;
return sk_receive_skb(sk, skb);
no_dccp_socket:
if (!xfrm4_policy_check(NULL, XFRM_POLICY_IN, skb))

17
net/dccp/ipv6.c
View File

@ -1032,7 +1032,6 @@ static int dccp_v6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
const struct dccp_hdr *dh;
struct sk_buff *skb = *pskb;
struct sock *sk;
int rc;
/* Step 1: Check header basics: */
@ -1077,21 +1076,7 @@ static int dccp_v6_rcv(struct sk_buff **pskb, unsigned int *nhoffp)
if (!xfrm6_policy_check(sk, XFRM_POLICY_IN, skb))
goto discard_and_relse;
if (sk_filter(sk, skb, 0))
goto discard_and_relse;
skb->dev = NULL;
bh_lock_sock(sk);
rc = 0;
if (!sock_owned_by_user(sk))
rc = dccp_v6_do_rcv(sk, skb);
else
sk_add_backlog(sk, skb);
bh_unlock_sock(sk);
sock_put(sk);
return rc ? -1 : 0;
return sk_receive_skb(sk, skb) ? -1 : 0;
no_dccp_socket:
if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))

17
net/decnet/dn_nsp_in.c
View File

@ -793,7 +793,6 @@ static int dn_nsp_rx_packet(struct sk_buff *skb)
got_it:
if (sk != NULL) {
struct dn_scp *scp = DN_SK(sk);
int ret;
/* Reset backoff */
scp->nsp_rxtshift = 0;
@ -807,21 +806,7 @@ static int dn_nsp_rx_packet(struct sk_buff *skb)
goto free_out;
}
bh_lock_sock(sk);
ret = NET_RX_SUCCESS;
if (decnet_debug_level & 8)
printk(KERN_DEBUG "NSP: 0x%02x 0x%02x 0x%04x 0x%04x %d\n",
(int)cb->rt_flags, (int)cb->nsp_flags,
(int)cb->src_port, (int)cb->dst_port,
!!sock_owned_by_user(sk));
if (!sock_owned_by_user(sk))
ret = dn_nsp_backlog_rcv(sk, skb);
else
sk_add_backlog(sk, skb);
bh_unlock_sock(sk);
sock_put(sk);
return ret;
return sk_receive_skb(sk, skb);
}
return dn_nsp_no_socket(skb, reason);