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authorSowmini Varadhan <sowmini.varadhan@oracle.com>2016-06-13 18:44:42 +0200
committerDavid S. Miller <davem@davemloft.net>2016-06-15 08:50:44 +0200
commit3ecc5693c02bb154bc8609c640eb862804c4aabb (patch)
tree39e88c9b47c49568aee3906e9e8299c824a5b548 /net/rds/connection.c
parentRDS: Update rds_conn_shutdown to work with rds_conn_path (diff)
downloadlinux-3ecc5693c02bb154bc8609c640eb862804c4aabb.tar.xz
linux-3ecc5693c02bb154bc8609c640eb862804c4aabb.zip
RDS: Update rds_conn_destroy to be MP capable
Refactor rds_conn_destroy() so that the per-path dismantling is done in rds_conn_path_destroy, and then iterate as needed over rds_conn_path_destroy(). 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.c59
1 files changed, 39 insertions, 20 deletions
diff --git a/net/rds/connection.c b/net/rds/connection.c
index a88d26fd8223..a4b07c899d89 100644
--- a/net/rds/connection.c
+++ b/net/rds/connection.c
@@ -36,7 +36,6 @@
#include <linux/export.h>
#include <net/inet_hashtables.h>
-#include "rds_single_path.h"
#include "rds.h"
#include "loop.h"
@@ -364,6 +363,34 @@ void rds_conn_shutdown(struct rds_conn_path *cp)
}
}
+/* destroy a single rds_conn_path. rds_conn_destroy() iterates over
+ * all paths using rds_conn_path_destroy()
+ */
+static void rds_conn_path_destroy(struct rds_conn_path *cp)
+{
+ struct rds_message *rm, *rtmp;
+
+ rds_conn_path_drop(cp);
+ flush_work(&cp->cp_down_w);
+
+ /* make sure lingering queued work won't try to ref the conn */
+ cancel_delayed_work_sync(&cp->cp_send_w);
+ cancel_delayed_work_sync(&cp->cp_recv_w);
+
+ /* tear down queued messages */
+ list_for_each_entry_safe(rm, rtmp,
+ &cp->cp_send_queue,
+ m_conn_item) {
+ list_del_init(&rm->m_conn_item);
+ BUG_ON(!list_empty(&rm->m_sock_item));
+ rds_message_put(rm);
+ }
+ if (cp->cp_xmit_rm)
+ rds_message_put(cp->cp_xmit_rm);
+
+ cp->cp_conn->c_trans->conn_free(cp->cp_transport_data);
+}
+
/*
* Stop and free a connection.
*
@@ -373,7 +400,6 @@ void rds_conn_shutdown(struct rds_conn_path *cp)
*/
void rds_conn_destroy(struct rds_connection *conn)
{
- struct rds_message *rm, *rtmp;
unsigned long flags;
rdsdebug("freeing conn %p for %pI4 -> "
@@ -387,25 +413,19 @@ void rds_conn_destroy(struct rds_connection *conn)
synchronize_rcu();
/* shut the connection down */
- rds_conn_drop(conn);
- flush_work(&conn->c_down_w);
-
- /* make sure lingering queued work won't try to ref the conn */
- cancel_delayed_work_sync(&conn->c_send_w);
- cancel_delayed_work_sync(&conn->c_recv_w);
+ if (!conn->c_trans->t_mp_capable) {
+ rds_conn_path_destroy(&conn->c_path[0]);
+ BUG_ON(!list_empty(&conn->c_path[0].cp_retrans));
+ } else {
+ int i;
+ struct rds_conn_path *cp;
- /* tear down queued messages */
- list_for_each_entry_safe(rm, rtmp,
- &conn->c_send_queue,
- m_conn_item) {
- list_del_init(&rm->m_conn_item);
- BUG_ON(!list_empty(&rm->m_sock_item));
- rds_message_put(rm);
+ for (i = 0; i < RDS_MPATH_WORKERS; i++) {
+ cp = &conn->c_path[i];
+ rds_conn_path_destroy(cp);
+ BUG_ON(!list_empty(&cp->cp_retrans));
+ }
}
- if (conn->c_xmit_rm)
- rds_message_put(conn->c_xmit_rm);
-
- conn->c_trans->conn_free(conn->c_transport_data);
/*
* The congestion maps aren't freed up here. They're
@@ -414,7 +434,6 @@ void rds_conn_destroy(struct rds_connection *conn)
*/
rds_cong_remove_conn(conn);
- BUG_ON(!list_empty(&conn->c_retrans));
kmem_cache_free(rds_conn_slab, conn);
spin_lock_irqsave(&rds_conn_lock, flags);