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-rw-r--r--net/tipc/name_table.c6
-rw-r--r--net/tipc/name_table.h3
-rw-r--r--net/tipc/server.c70
-rw-r--r--net/tipc/server.h6
-rw-r--r--net/tipc/socket.c4
-rw-r--r--net/tipc/subscr.c21
6 files changed, 56 insertions, 54 deletions
diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index 64cdd3c302b0..ed0457cc99d6 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -680,8 +680,7 @@ exit:
* - Determines if any node local ports overlap
*/
void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower,
- u32 upper, u32 scope,
- struct tipc_nlist *nodes)
+ u32 upper, struct tipc_nlist *nodes)
{
struct sub_seq *sseq, *stop;
struct publication *publ;
@@ -699,8 +698,7 @@ void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower,
for (; sseq != stop && sseq->lower <= upper; sseq++) {
info = sseq->info;
list_for_each_entry(publ, &info->zone_list, zone_list) {
- if (publ->scope == scope)
- tipc_nlist_add(nodes, publ->node);
+ tipc_nlist_add(nodes, publ->node);
}
}
spin_unlock_bh(&seq->lock);
diff --git a/net/tipc/name_table.h b/net/tipc/name_table.h
index b595d8aa00f0..f56e7cb3d436 100644
--- a/net/tipc/name_table.h
+++ b/net/tipc/name_table.h
@@ -105,8 +105,7 @@ int tipc_nametbl_mc_lookup(struct net *net, u32 type, u32 lower, u32 upper,
void tipc_nametbl_build_group(struct net *net, struct tipc_group *grp,
u32 type, u32 domain);
void tipc_nametbl_lookup_dst_nodes(struct net *net, u32 type, u32 lower,
- u32 upper, u32 domain,
- struct tipc_nlist *nodes);
+ u32 upper, struct tipc_nlist *nodes);
bool tipc_nametbl_lookup(struct net *net, u32 type, u32 instance, u32 domain,
struct list_head *dsts, int *dstcnt, u32 exclude,
bool all);
diff --git a/net/tipc/server.c b/net/tipc/server.c
index 8ee5e86b7870..c0d331f13eee 100644
--- a/net/tipc/server.c
+++ b/net/tipc/server.c
@@ -132,10 +132,11 @@ static struct tipc_conn *tipc_conn_lookup(struct tipc_server *s, int conid)
spin_lock_bh(&s->idr_lock);
con = idr_find(&s->conn_idr, conid);
- if (con && test_bit(CF_CONNECTED, &con->flags))
- conn_get(con);
- else
- con = NULL;
+ if (con) {
+ if (!test_bit(CF_CONNECTED, &con->flags) ||
+ !kref_get_unless_zero(&con->kref))
+ con = NULL;
+ }
spin_unlock_bh(&s->idr_lock);
return con;
}
@@ -183,35 +184,28 @@ static void tipc_register_callbacks(struct socket *sock, struct tipc_conn *con)
write_unlock_bh(&sk->sk_callback_lock);
}
-static void tipc_unregister_callbacks(struct tipc_conn *con)
-{
- struct sock *sk = con->sock->sk;
-
- write_lock_bh(&sk->sk_callback_lock);
- sk->sk_user_data = NULL;
- write_unlock_bh(&sk->sk_callback_lock);
-}
-
static void tipc_close_conn(struct tipc_conn *con)
{
struct tipc_server *s = con->server;
+ struct sock *sk = con->sock->sk;
+ bool disconnect = false;
- if (test_and_clear_bit(CF_CONNECTED, &con->flags)) {
- if (con->sock)
- tipc_unregister_callbacks(con);
-
+ write_lock_bh(&sk->sk_callback_lock);
+ disconnect = test_and_clear_bit(CF_CONNECTED, &con->flags);
+ if (disconnect) {
+ sk->sk_user_data = NULL;
if (con->conid)
s->tipc_conn_release(con->conid, con->usr_data);
-
- /* We shouldn't flush pending works as we may be in the
- * thread. In fact the races with pending rx/tx work structs
- * are harmless for us here as we have already deleted this
- * connection from server connection list.
- */
- if (con->sock)
- kernel_sock_shutdown(con->sock, SHUT_RDWR);
- conn_put(con);
}
+ write_unlock_bh(&sk->sk_callback_lock);
+
+ /* Handle concurrent calls from sending and receiving threads */
+ if (!disconnect)
+ return;
+
+ /* Don't flush pending works, -just let them expire */
+ kernel_sock_shutdown(con->sock, SHUT_RDWR);
+ conn_put(con);
}
static struct tipc_conn *tipc_alloc_conn(struct tipc_server *s)
@@ -248,9 +242,10 @@ static struct tipc_conn *tipc_alloc_conn(struct tipc_server *s)
static int tipc_receive_from_sock(struct tipc_conn *con)
{
- struct msghdr msg = {};
struct tipc_server *s = con->server;
+ struct sock *sk = con->sock->sk;
struct sockaddr_tipc addr;
+ struct msghdr msg = {};
struct kvec iov;
void *buf;
int ret;
@@ -271,12 +266,15 @@ static int tipc_receive_from_sock(struct tipc_conn *con)
goto out_close;
}
- s->tipc_conn_recvmsg(sock_net(con->sock->sk), con->conid, &addr,
- con->usr_data, buf, ret);
-
+ read_lock_bh(&sk->sk_callback_lock);
+ if (test_bit(CF_CONNECTED, &con->flags))
+ ret = s->tipc_conn_recvmsg(sock_net(con->sock->sk), con->conid,
+ &addr, con->usr_data, buf, ret);
+ read_unlock_bh(&sk->sk_callback_lock);
kmem_cache_free(s->rcvbuf_cache, buf);
-
- return 0;
+ if (ret < 0)
+ tipc_conn_terminate(s, con->conid);
+ return ret;
out_close:
if (ret != -EWOULDBLOCK)
@@ -525,11 +523,17 @@ bool tipc_topsrv_kern_subscr(struct net *net, u32 port, u32 type, u32 lower,
void tipc_topsrv_kern_unsubscr(struct net *net, int conid)
{
struct tipc_conn *con;
+ struct tipc_server *srv;
con = tipc_conn_lookup(tipc_topsrv(net), conid);
if (!con)
return;
- tipc_close_conn(con);
+
+ test_and_clear_bit(CF_CONNECTED, &con->flags);
+ srv = con->server;
+ if (con->conid)
+ srv->tipc_conn_release(con->conid, con->usr_data);
+ conn_put(con);
conn_put(con);
}
diff --git a/net/tipc/server.h b/net/tipc/server.h
index 17f49ee44cfd..64df7513cd70 100644
--- a/net/tipc/server.h
+++ b/net/tipc/server.h
@@ -74,9 +74,9 @@ struct tipc_server {
int max_rcvbuf_size;
void *(*tipc_conn_new)(int conid);
void (*tipc_conn_release)(int conid, void *usr_data);
- void (*tipc_conn_recvmsg)(struct net *net, int conid,
- struct sockaddr_tipc *addr, void *usr_data,
- void *buf, size_t len);
+ int (*tipc_conn_recvmsg)(struct net *net, int conid,
+ struct sockaddr_tipc *addr, void *usr_data,
+ void *buf, size_t len);
struct sockaddr_tipc *saddr;
char name[TIPC_SERVER_NAME_LEN];
int imp;
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 1f236271766c..d799e50ff722 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -772,7 +772,6 @@ static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq,
struct net *net = sock_net(sk);
int mtu = tipc_bcast_get_mtu(net);
struct tipc_mc_method *method = &tsk->mc_method;
- u32 domain = addr_domain(net, TIPC_CLUSTER_SCOPE);
struct sk_buff_head pkts;
struct tipc_nlist dsts;
int rc;
@@ -788,7 +787,7 @@ static int tipc_sendmcast(struct socket *sock, struct tipc_name_seq *seq,
/* Lookup destination nodes */
tipc_nlist_init(&dsts, tipc_own_addr(net));
tipc_nametbl_lookup_dst_nodes(net, seq->type, seq->lower,
- seq->upper, domain, &dsts);
+ seq->upper, &dsts);
if (!dsts.local && !dsts.remote)
return -EHOSTUNREACH;
@@ -2774,6 +2773,7 @@ static int tipc_sk_join(struct tipc_sock *tsk, struct tipc_group_req *mreq)
if (rc) {
tipc_group_delete(net, grp);
tsk->group = NULL;
+ return rc;
}
/* Eliminate any risk that a broadcast overtakes sent JOINs */
tsk->mc_method.rcast = true;
diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c
index 44df528ed6ab..68e26470c516 100644
--- a/net/tipc/subscr.c
+++ b/net/tipc/subscr.c
@@ -289,17 +289,16 @@ static struct tipc_subscription *tipc_subscrp_create(struct net *net,
return sub;
}
-static void tipc_subscrp_subscribe(struct net *net, struct tipc_subscr *s,
- struct tipc_subscriber *subscriber, int swap,
- bool status)
+static int tipc_subscrp_subscribe(struct net *net, struct tipc_subscr *s,
+ struct tipc_subscriber *subscriber, int swap,
+ bool status)
{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
struct tipc_subscription *sub = NULL;
u32 timeout;
sub = tipc_subscrp_create(net, s, swap);
if (!sub)
- return tipc_conn_terminate(tn->topsrv, subscriber->conid);
+ return -1;
spin_lock_bh(&subscriber->lock);
list_add(&sub->subscrp_list, &subscriber->subscrp_list);
@@ -313,6 +312,7 @@ static void tipc_subscrp_subscribe(struct net *net, struct tipc_subscr *s,
if (timeout != TIPC_WAIT_FOREVER)
mod_timer(&sub->timer, jiffies + msecs_to_jiffies(timeout));
+ return 0;
}
/* Handle one termination request for the subscriber */
@@ -322,9 +322,9 @@ static void tipc_subscrb_release_cb(int conid, void *usr_data)
}
/* Handle one request to create a new subscription for the subscriber */
-static void tipc_subscrb_rcv_cb(struct net *net, int conid,
- struct sockaddr_tipc *addr, void *usr_data,
- void *buf, size_t len)
+static int tipc_subscrb_rcv_cb(struct net *net, int conid,
+ struct sockaddr_tipc *addr, void *usr_data,
+ void *buf, size_t len)
{
struct tipc_subscriber *subscriber = usr_data;
struct tipc_subscr *s = (struct tipc_subscr *)buf;
@@ -338,10 +338,11 @@ static void tipc_subscrb_rcv_cb(struct net *net, int conid,
/* Detect & process a subscription cancellation request */
if (s->filter & htohl(TIPC_SUB_CANCEL, swap)) {
s->filter &= ~htohl(TIPC_SUB_CANCEL, swap);
- return tipc_subscrp_cancel(s, subscriber);
+ tipc_subscrp_cancel(s, subscriber);
+ return 0;
}
status = !(s->filter & htohl(TIPC_SUB_NO_STATUS, swap));
- tipc_subscrp_subscribe(net, s, subscriber, swap, status);
+ return tipc_subscrp_subscribe(net, s, subscriber, swap, status);
}
/* Handle one request to establish a new subscriber */
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