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authorSowmini Varadhan <sowmini.varadhan@oracle.com>2018-01-04 17:52:59 +0300
committerDavid S. Miller <davem@davemloft.net>2018-01-05 21:39:18 +0300
commitc90ecbfaf50d2d7db25c531d9169be7e47435f3f (patch)
tree51a00b04b5e2ecc649922007def9b8836fb76245 /net/rds
parenteb9aa1bfbad8c9fc280adf43cb480911295cfa3f (diff)
downloadlinux-c90ecbfaf50d2d7db25c531d9169be7e47435f3f.tar.xz
rds: Use atomic flag to track connections being destroyed
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>
Diffstat (limited to 'net/rds')
-rw-r--r--net/rds/connection.c7
-rw-r--r--net/rds/rds.h4
-rw-r--r--net/rds/tcp_connect.c2
3 files changed, 7 insertions, 6 deletions
diff --git a/net/rds/connection.c b/net/rds/connection.c
index 6492c0b608a4..1eed197e694f 100644
--- a/net/rds/connection.c
+++ b/net/rds/connection.c
@@ -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);
diff --git a/net/rds/rds.h b/net/rds/rds.h
index d09f6c1facb4..374ae83b60d4 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -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;
diff --git a/net/rds/tcp_connect.c b/net/rds/tcp_connect.c
index 46f74dad0e16..534c67aeb20f 100644
--- a/net/rds/tcp_connect.c
+++ b/net/rds/tcp_connect.c
@@ -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);