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tipc: use generic SKB list APIs to manage TIPC outgoing packet chains

Browse Source 
Use standard SKB list APIs associated with struct sk_buff_head to
manage socket outgoing packet chain and name table outgoing packet
chain, having relevant code simpler and more readable.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ying Xue
2014-11-26 11:41:55 +08:00
committed by David S. Miller
parent f03273f1e2
commit a6ca109443
8 changed files with 203 additions and 175 deletions
Download Patch File Download Diff File Expand all files Collapse all files

127
net/tipc/socket.c
View File

@@ -244,12 +244,12 @@ static void tsk_advance_rx_queue(struct sock *sk)
*/
static void tsk_rej_rx_queue(struct sock *sk)
{
struct sk_buff *buf;
struct sk_buff *skb;
u32 dnode;
while ((buf = __skb_dequeue(&sk->sk_receive_queue))) {
if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT))
tipc_link_xmit(buf, dnode, 0);
while ((skb = __skb_dequeue(&sk->sk_receive_queue))) {
if (tipc_msg_reverse(skb, &dnode, TIPC_ERR_NO_PORT))
tipc_link_xmit_skb(skb, dnode, 0);
}
}
@@ -462,7 +462,7 @@ static int tipc_release(struct socket *sock)
{
struct sock *sk = sock->sk;
struct tipc_sock *tsk;
struct sk_buff *buf;
struct sk_buff *skb;
u32 dnode;
/*
@@ -481,11 +481,11 @@ static int tipc_release(struct socket *sock)
*/
dnode = tsk_peer_node(tsk);
while (sock->state != SS_DISCONNECTING) {
buf = __skb_dequeue(&sk->sk_receive_queue);
if (buf == NULL)
skb = __skb_dequeue(&sk->sk_receive_queue);
if (skb == NULL)
break;
if (TIPC_SKB_CB(buf)->handle != NULL)
kfree_skb(buf);
if (TIPC_SKB_CB(skb)->handle != NULL)
kfree_skb(skb);
else {
if ((sock->state == SS_CONNECTING) ||
(sock->state == SS_CONNECTED)) {
@@ -493,8 +493,8 @@ static int tipc_release(struct socket *sock)
tsk->connected = 0;
tipc_node_remove_conn(dnode, tsk->ref);
}
if (tipc_msg_reverse(buf, &dnode, TIPC_ERR_NO_PORT))
tipc_link_xmit(buf, dnode, 0);
if (tipc_msg_reverse(skb, &dnode, TIPC_ERR_NO_PORT))
tipc_link_xmit_skb(skb, dnode, 0);
}
}
@@ -502,12 +502,12 @@ static int tipc_release(struct socket *sock)
tipc_sk_ref_discard(tsk->ref);
k_cancel_timer(&tsk->timer);
if (tsk->connected) {
buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG,
skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG,
SHORT_H_SIZE, 0, dnode, tipc_own_addr,
tsk_peer_port(tsk),
tsk->ref, TIPC_ERR_NO_PORT);
if (buf)
tipc_link_xmit(buf, dnode, tsk->ref);
if (skb)
tipc_link_xmit_skb(skb, dnode, tsk->ref);
tipc_node_remove_conn(dnode, tsk->ref);
}
k_term_timer(&tsk->timer);
@@ -712,7 +712,7 @@ static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq,
{
struct sock *sk = sock->sk;
struct tipc_msg *mhdr = &tipc_sk(sk)->phdr;
struct sk_buff *buf;
struct sk_buff_head head;
uint mtu;
int rc;
@@ -727,12 +727,13 @@ static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq,
new_mtu:
mtu = tipc_bclink_get_mtu();
rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, &buf);
__skb_queue_head_init(&head);
rc = tipc_msg_build(mhdr, msg, 0, dsz, mtu, &head);
if (unlikely(rc < 0))
return rc;
do {
rc = tipc_bclink_xmit(buf);
rc = tipc_bclink_xmit(&head);
if (likely(rc >= 0)) {
rc = dsz;
break;
@@ -744,7 +745,7 @@ new_mtu:
tipc_sk(sk)->link_cong = 1;
rc = tipc_wait_for_sndmsg(sock, &timeo);
if (rc)
kfree_skb_list(buf);
__skb_queue_purge(&head);
} while (!rc);
return rc;
}
@@ -906,7 +907,8 @@ static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock,
struct tipc_sock *tsk = tipc_sk(sk);
struct tipc_msg *mhdr = &tsk->phdr;
u32 dnode, dport;
struct sk_buff *buf;
struct sk_buff_head head;
struct sk_buff *skb;
struct tipc_name_seq *seq = &dest->addr.nameseq;
u32 mtu;
long timeo;
@@ -981,13 +983,15 @@ static int tipc_sendmsg(struct kiocb *iocb, struct socket *sock,
new_mtu:
mtu = tipc_node_get_mtu(dnode, tsk->ref);
rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, &buf);
__skb_queue_head_init(&head);
rc = tipc_msg_build(mhdr, m, 0, dsz, mtu, &head);
if (rc < 0)
goto exit;
do {
TIPC_SKB_CB(buf)->wakeup_pending = tsk->link_cong;
rc = tipc_link_xmit(buf, dnode, tsk->ref);
skb = skb_peek(&head);
TIPC_SKB_CB(skb)->wakeup_pending = tsk->link_cong;
rc = tipc_link_xmit(&head, dnode, tsk->ref);
if (likely(rc >= 0)) {
if (sock->state != SS_READY)
sock->state = SS_CONNECTING;
@@ -1001,7 +1005,7 @@ new_mtu:
tsk->link_cong = 1;
rc = tipc_wait_for_sndmsg(sock, &timeo);
if (rc)
kfree_skb_list(buf);
__skb_queue_purge(&head);
} while (!rc);
exit:
if (iocb)
@@ -1058,7 +1062,7 @@ static int tipc_send_stream(struct kiocb *iocb, struct socket *sock,
struct sock *sk = sock->sk;
struct tipc_sock *tsk = tipc_sk(sk);
struct tipc_msg *mhdr = &tsk->phdr;
struct sk_buff *buf;
struct sk_buff_head head;
DECLARE_SOCKADDR(struct sockaddr_tipc *, dest, m->msg_name);
u32 ref = tsk->ref;
int rc = -EINVAL;
@@ -1093,12 +1097,13 @@ static int tipc_send_stream(struct kiocb *iocb, struct socket *sock,
next:
mtu = tsk->max_pkt;
send = min_t(uint, dsz - sent, TIPC_MAX_USER_MSG_SIZE);
rc = tipc_msg_build(mhdr, m, sent, send, mtu, &buf);
__skb_queue_head_init(&head);
rc = tipc_msg_build(mhdr, m, sent, send, mtu, &head);
if (unlikely(rc < 0))
goto exit;
do {
if (likely(!tsk_conn_cong(tsk))) {
rc = tipc_link_xmit(buf, dnode, ref);
rc = tipc_link_xmit(&head, dnode, ref);
if (likely(!rc)) {
tsk->sent_unacked++;
sent += send;
@@ -1116,7 +1121,7 @@ next:
}
rc = tipc_wait_for_sndpkt(sock, &timeo);
if (rc)
kfree_skb_list(buf);
__skb_queue_purge(&head);
} while (!rc);
exit:
if (iocb)
@@ -1261,20 +1266,20 @@ static int tipc_sk_anc_data_recv(struct msghdr *m, struct tipc_msg *msg,
static void tipc_sk_send_ack(struct tipc_sock *tsk, uint ack)
{
struct sk_buff *buf = NULL;
struct sk_buff *skb = NULL;
struct tipc_msg *msg;
u32 peer_port = tsk_peer_port(tsk);
u32 dnode = tsk_peer_node(tsk);
if (!tsk->connected)
return;
buf = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, dnode,
skb = tipc_msg_create(CONN_MANAGER, CONN_ACK, INT_H_SIZE, 0, dnode,
tipc_own_addr, peer_port, tsk->ref, TIPC_OK);
if (!buf)
if (!skb)
return;
msg = buf_msg(buf);
msg = buf_msg(skb);
msg_set_msgcnt(msg, ack);
tipc_link_xmit(buf, dnode, msg_link_selector(msg));
tipc_link_xmit_skb(skb, dnode, msg_link_selector(msg));
}
static int tipc_wait_for_rcvmsg(struct socket *sock, long *timeop)
@@ -1729,20 +1734,20 @@ static int filter_rcv(struct sock *sk, struct sk_buff *buf)
/**
* tipc_backlog_rcv - handle incoming message from backlog queue
* @sk: socket
* @buf: message
* @skb: message
*
* Caller must hold socket lock, but not port lock.
*
* Returns 0
*/
static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *buf)
static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *skb)
{
int rc;
u32 onode;
struct tipc_sock *tsk = tipc_sk(sk);
uint truesize = buf->truesize;
uint truesize = skb->truesize;
rc = filter_rcv(sk, buf);
rc = filter_rcv(sk, skb);
if (likely(!rc)) {
if (atomic_read(&tsk->dupl_rcvcnt) < TIPC_CONN_OVERLOAD_LIMIT)
@@ -1750,25 +1755,25 @@ static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *buf)
return 0;
}
if ((rc < 0) && !tipc_msg_reverse(buf, &onode, -rc))
if ((rc < 0) && !tipc_msg_reverse(skb, &onode, -rc))
return 0;
tipc_link_xmit(buf, onode, 0);
tipc_link_xmit_skb(skb, onode, 0);
return 0;
}
/**
* tipc_sk_rcv - handle incoming message
* @buf: buffer containing arriving message
* @skb: buffer containing arriving message
* Consumes buffer
* Returns 0 if success, or errno: -EHOSTUNREACH
*/
int tipc_sk_rcv(struct sk_buff *buf)
int tipc_sk_rcv(struct sk_buff *skb)
{
struct tipc_sock *tsk;
struct sock *sk;
u32 dport = msg_destport(buf_msg(buf));
u32 dport = msg_destport(buf_msg(skb));
int rc = TIPC_OK;
uint limit;
u32 dnode;
@@ -1776,7 +1781,7 @@ int tipc_sk_rcv(struct sk_buff *buf)
/* Validate destination and message */
tsk = tipc_sk_get(dport);
if (unlikely(!tsk)) {
rc = tipc_msg_eval(buf, &dnode);
rc = tipc_msg_eval(skb, &dnode);
goto exit;
}
sk = &tsk->sk;
@@ -1785,12 +1790,12 @@ int tipc_sk_rcv(struct sk_buff *buf)
spin_lock_bh(&sk->sk_lock.slock);
if (!sock_owned_by_user(sk)) {
rc = filter_rcv(sk, buf);
rc = filter_rcv(sk, skb);
} else {
if (sk->sk_backlog.len == 0)
atomic_set(&tsk->dupl_rcvcnt, 0);
limit = rcvbuf_limit(sk, buf) + atomic_read(&tsk->dupl_rcvcnt);
if (sk_add_backlog(sk, buf, limit))
limit = rcvbuf_limit(sk, skb) + atomic_read(&tsk->dupl_rcvcnt);
if (sk_add_backlog(sk, skb, limit))
rc = -TIPC_ERR_OVERLOAD;
}
spin_unlock_bh(&sk->sk_lock.slock);
@@ -1798,10 +1803,10 @@ int tipc_sk_rcv(struct sk_buff *buf)
if (likely(!rc))
return 0;
exit:
if ((rc < 0) && !tipc_msg_reverse(buf, &dnode, -rc))
if ((rc < 0) && !tipc_msg_reverse(skb, &dnode, -rc))
return -EHOSTUNREACH;
tipc_link_xmit(buf, dnode, 0);
tipc_link_xmit_skb(skb, dnode, 0);
return (rc < 0) ? -EHOSTUNREACH : 0;
}
@@ -2059,7 +2064,7 @@ static int tipc_shutdown(struct socket *sock, int how)
{
struct sock *sk = sock->sk;
struct tipc_sock *tsk = tipc_sk(sk);
struct sk_buff *buf;
struct sk_buff *skb;
u32 dnode;
int res;
@@ -2074,23 +2079,23 @@ static int tipc_shutdown(struct socket *sock, int how)
restart:
/* Disconnect and send a 'FIN+' or 'FIN-' message to peer */
buf = __skb_dequeue(&sk->sk_receive_queue);
if (buf) {
if (TIPC_SKB_CB(buf)->handle != NULL) {
kfree_skb(buf);
skb = __skb_dequeue(&sk->sk_receive_queue);
if (skb) {
if (TIPC_SKB_CB(skb)->handle != NULL) {
kfree_skb(skb);
goto restart;
}
if (tipc_msg_reverse(buf, &dnode, TIPC_CONN_SHUTDOWN))
tipc_link_xmit(buf, dnode, tsk->ref);
if (tipc_msg_reverse(skb, &dnode, TIPC_CONN_SHUTDOWN))
tipc_link_xmit_skb(skb, dnode, tsk->ref);
tipc_node_remove_conn(dnode, tsk->ref);
} else {
dnode = tsk_peer_node(tsk);
buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE,
skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE,
TIPC_CONN_MSG, SHORT_H_SIZE,
0, dnode, tipc_own_addr,
tsk_peer_port(tsk),
tsk->ref, TIPC_CONN_SHUTDOWN);
tipc_link_xmit(buf, dnode, tsk->ref);
tipc_link_xmit_skb(skb, dnode, tsk->ref);
}
tsk->connected = 0;
sock->state = SS_DISCONNECTING;
@@ -2119,7 +2124,7 @@ static void tipc_sk_timeout(unsigned long ref)
{
struct tipc_sock *tsk;
struct sock *sk;
struct sk_buff *buf = NULL;
struct sk_buff *skb = NULL;
u32 peer_port, peer_node;
tsk = tipc_sk_get(ref);
@@ -2137,20 +2142,20 @@ static void tipc_sk_timeout(unsigned long ref)
if (tsk->probing_state == TIPC_CONN_PROBING) {
/* Previous probe not answered -> self abort */
buf = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG,
skb = tipc_msg_create(TIPC_CRITICAL_IMPORTANCE, TIPC_CONN_MSG,
SHORT_H_SIZE, 0, tipc_own_addr,
peer_node, ref, peer_port,
TIPC_ERR_NO_PORT);
} else {
buf = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE,
skb = tipc_msg_create(CONN_MANAGER, CONN_PROBE, INT_H_SIZE,
0, peer_node, tipc_own_addr,
peer_port, ref, TIPC_OK);
tsk->probing_state = TIPC_CONN_PROBING;
k_start_timer(&tsk->timer, tsk->probing_interval);
}
bh_unlock_sock(sk);
if (buf)
tipc_link_xmit(buf, peer_node, ref);
if (skb)
tipc_link_xmit_skb(skb, peer_node, ref);
exit:
tipc_sk_put(tsk);
}