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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>
This commit is contained in:
Sowmini Varadhan 2016-06-13 09:44:40 -07:00 committed by David S. Miller
parent fb1b3dc43d
commit 1c5113cf79
1 changed files with 45 additions and 20 deletions
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65
net/rds/connection.c
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@ -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++;