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rds: Use atomic flag to track connections being destroyed

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Replace c_destroy_in_prog by using a bit in cp_flags that
can set/tested atomically.

Signed-off-by: Sowmini Varadhan <sowmini.varadhan@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sowmini Varadhan 2018-01-04 06:52:59 -08:00 committed by David S. Miller
parent eb9aa1bfba
commit c90ecbfaf5
3 changed files with 7 additions and 6 deletions
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7
net/rds/connection.c
View File

@ -366,7 +366,7 @@ void rds_conn_shutdown(struct rds_conn_path *cp)
* to the conn hash, so we never trigger a reconnect on this
* conn - the reconnect is always triggered by the active peer. */
cancel_delayed_work_sync(&cp->cp_conn_w);
if (conn->c_destroy_in_prog)
if (test_bit(RDS_DESTROY_PENDING, &cp->cp_flags))
return;
rcu_read_lock();
if (!hlist_unhashed(&conn->c_hash_node)) {
@ -384,6 +384,8 @@ static void rds_conn_path_destroy(struct rds_conn_path *cp)
{
struct rds_message *rm, *rtmp;
set_bit(RDS_DESTROY_PENDING, &cp->cp_flags);
if (!cp->cp_transport_data)
return;
@ -426,7 +428,6 @@ void rds_conn_destroy(struct rds_connection *conn)
"%pI4\n", conn, &conn->c_laddr,
&conn->c_faddr);
conn->c_destroy_in_prog = 1;
/* Ensure conn will not be scheduled for reconnect */
spin_lock_irq(&rds_conn_lock);
hlist_del_init_rcu(&conn->c_hash_node);
@ -685,7 +686,7 @@ void rds_conn_path_drop(struct rds_conn_path *cp, bool destroy)
{
atomic_set(&cp->cp_state, RDS_CONN_ERROR);
if (!destroy && cp->cp_conn->c_destroy_in_prog)
if (!destroy && test_bit(RDS_DESTROY_PENDING, &cp->cp_flags))
return;
queue_work(rds_wq, &cp->cp_down_w);

4
net/rds/rds.h
View File

@ -88,6 +88,7 @@ enum {
#define RDS_RECONNECT_PENDING 1
#define RDS_IN_XMIT 2
#define RDS_RECV_REFILL 3
#define RDS_DESTROY_PENDING 4
/* Max number of multipaths per RDS connection. Must be a power of 2 */
#define RDS_MPATH_WORKERS 8
@ -139,8 +140,7 @@ struct rds_connection {
__be32 c_faddr;
unsigned int c_loopback:1,
c_ping_triggered:1,
c_destroy_in_prog:1,
c_pad_to_32:29;
c_pad_to_32:30;
int c_npaths;
struct rds_connection *c_passive;
struct rds_transport *c_trans;

2
net/rds/tcp_connect.c
View File

@ -170,7 +170,7 @@ void rds_tcp_conn_path_shutdown(struct rds_conn_path *cp)
cp->cp_conn, tc, sock);
if (sock) {
if (cp->cp_conn->c_destroy_in_prog)
if (test_bit(RDS_DESTROY_PENDING, &cp->cp_flags))
rds_tcp_set_linger(sock);
sock->ops->shutdown(sock, RCV_SHUTDOWN | SEND_SHUTDOWN);
lock_sock(sock->sk);