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authorSowmini Varadhan <sowmini.varadhan@oracle.com>2016-06-13 09:44:40 -0700
committerDavid S. Miller <davem@davemloft.net>2016-06-14 23:50:44 -0700
commit1c5113cf796bb730abc1798a3649b61e9e022be6 (patch)
tree59486163d4c94c1a32508710c5df8cc1ab0eca7f /net/rds/connection.c
parentfb1b3dc43dabd4bf7b57b3d63fd2875a499c81f0 (diff)
downloadlinux-1c5113cf796bb730abc1798a3649b61e9e022be6.tar.bz2
RDS: Initialize all RDS_MPATH_WORKERS in __rds_conn_create
Add a for() loop in __rds_conn_create to initialize all the conn_paths, in preparate for MP capable transports. Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/rds/connection.c')
-rw-r--r--net/rds/connection.c65
1 files changed, 45 insertions, 20 deletions
diff --git a/net/rds/connection.c b/net/rds/connection.c
index 57556e615ce2..a99ac69f77ac 100644
--- a/net/rds/connection.c
+++ b/net/rds/connection.c
@@ -111,6 +111,32 @@ static void rds_conn_reset(struct rds_connection *conn)
* reliability guarantees of RDS. */
}
+static void __rds_conn_path_init(struct rds_connection *conn,
+ struct rds_conn_path *cp, bool is_outgoing)
+{
+ spin_lock_init(&cp->cp_lock);
+ cp->cp_next_tx_seq = 1;
+ init_waitqueue_head(&cp->cp_waitq);
+ INIT_LIST_HEAD(&cp->cp_send_queue);
+ INIT_LIST_HEAD(&cp->cp_retrans);
+
+ cp->cp_conn = conn;
+ atomic_set(&cp->cp_state, RDS_CONN_DOWN);
+ cp->cp_send_gen = 0;
+ /* cp_outgoing is per-path. So we can only set it here
+ * for the single-path transports.
+ */
+ if (!conn->c_trans->t_mp_capable)
+ cp->cp_outgoing = (is_outgoing ? 1 : 0);
+ cp->cp_reconnect_jiffies = 0;
+ INIT_DELAYED_WORK(&cp->cp_send_w, rds_send_worker);
+ INIT_DELAYED_WORK(&cp->cp_recv_w, rds_recv_worker);
+ INIT_DELAYED_WORK(&cp->cp_conn_w, rds_connect_worker);
+ INIT_WORK(&cp->cp_down_w, rds_shutdown_worker);
+ mutex_init(&cp->cp_cm_lock);
+ cp->cp_flags = 0;
+}
+
/*
* There is only every one 'conn' for a given pair of addresses in the
* system at a time. They contain messages to be retransmitted and so
@@ -154,14 +180,8 @@ static struct rds_connection *__rds_conn_create(struct net *net,
INIT_HLIST_NODE(&conn->c_hash_node);
conn->c_laddr = laddr;
conn->c_faddr = faddr;
- spin_lock_init(&conn->c_lock);
- conn->c_next_tx_seq = 1;
- conn->c_path[0].cp_conn = conn;
- rds_conn_net_set(conn, net);
- init_waitqueue_head(&conn->c_waitq);
- INIT_LIST_HEAD(&conn->c_send_queue);
- INIT_LIST_HEAD(&conn->c_retrans);
+ rds_conn_net_set(conn, net);
ret = rds_cong_get_maps(conn);
if (ret) {
@@ -197,17 +217,6 @@ static struct rds_connection *__rds_conn_create(struct net *net,
goto out;
}
- atomic_set(&conn->c_state, RDS_CONN_DOWN);
- conn->c_send_gen = 0;
- conn->c_path[0].cp_outgoing = (is_outgoing ? 1 : 0);
- conn->c_reconnect_jiffies = 0;
- INIT_DELAYED_WORK(&conn->c_send_w, rds_send_worker);
- INIT_DELAYED_WORK(&conn->c_recv_w, rds_recv_worker);
- INIT_DELAYED_WORK(&conn->c_conn_w, rds_connect_worker);
- INIT_WORK(&conn->c_down_w, rds_shutdown_worker);
- mutex_init(&conn->c_cm_lock);
- conn->c_flags = 0;
-
rdsdebug("allocated conn %p for %pI4 -> %pI4 over %s %s\n",
conn, &laddr, &faddr,
trans->t_name ? trans->t_name : "[unknown]",
@@ -224,7 +233,7 @@ static struct rds_connection *__rds_conn_create(struct net *net,
if (parent) {
/* Creating passive conn */
if (parent->c_passive) {
- trans->conn_free(conn->c_transport_data);
+ trans->conn_free(conn->c_path[0].cp_transport_data);
kmem_cache_free(rds_conn_slab, conn);
conn = parent->c_passive;
} else {
@@ -238,10 +247,26 @@ static struct rds_connection *__rds_conn_create(struct net *net,
found = rds_conn_lookup(net, head, laddr, faddr, trans);
if (found) {
- trans->conn_free(conn->c_transport_data);
+ struct rds_conn_path *cp;
+ int i;
+
+ for (i = 0; i < RDS_MPATH_WORKERS; i++) {
+ cp = &conn->c_path[i];
+ trans->conn_free(cp->cp_transport_data);
+ if (!trans->t_mp_capable)
+ break;
+ }
kmem_cache_free(rds_conn_slab, conn);
conn = found;
} else {
+ int i;
+
+ for (i = 0; i < RDS_MPATH_WORKERS; i++) {
+ __rds_conn_path_init(conn, &conn->c_path[i],
+ is_outgoing);
+ conn->c_path[i].cp_index = i;
+ }
+
hlist_add_head_rcu(&conn->c_hash_node, head);
rds_cong_add_conn(conn);
rds_conn_count++;