From 25995ff577675b58dbd848b7758e7bad87411947 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 27 Dec 2005 02:42:22 -0200 Subject: [PATCH] [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 Signed-off-by: David S. Miller --- drivers/net/pppoe.c | 22 ++-------------------- include/net/sock.h | 23 +++++++++++++++++++++++ net/dccp/ipv4.c | 23 ++--------------------- net/dccp/ipv6.c | 17 +---------------- net/decnet/dn_nsp_in.c | 17 +---------------- 5 files changed, 29 insertions(+), 73 deletions(-) diff --git a/drivers/net/pppoe.c b/drivers/net/pppoe.c index a842ecc60a3..71e303b2864 100644 --- a/drivers/net/pppoe.c +++ b/drivers/net/pppoe.c @@ -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: diff --git a/include/net/sock.h b/include/net/sock.h index 91d28957dc1..6961700ff3a 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -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, diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index c363051a7f1..99e8afa7ba1 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -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)) diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c index 599b0be2151..2e194c8f995 100644 --- a/net/dccp/ipv6.c +++ b/net/dccp/ipv6.c @@ -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)) diff --git a/net/decnet/dn_nsp_in.c b/net/decnet/dn_nsp_in.c index 369f25b60f3..44bda85e678 100644 --- a/net/decnet/dn_nsp_in.c +++ b/net/decnet/dn_nsp_in.c @@ -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 @@ got_it: 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); -- 2.20.1