void __user *buffer, size_t *lenp,
loff_t *fpos);
-int rds_tcp_min_sndbuf = SOCK_MIN_SNDBUF;
-int rds_tcp_min_rcvbuf = SOCK_MIN_RCVBUF;
+static int rds_tcp_min_sndbuf = SOCK_MIN_SNDBUF;
+static int rds_tcp_min_rcvbuf = SOCK_MIN_RCVBUF;
static struct ctl_table rds_tcp_sysctl_table[] = {
#define RDS_TCP_SNDBUF 0
* from being called while it isn't set.
*/
void rds_tcp_reset_callbacks(struct socket *sock,
- struct rds_connection *conn)
+ struct rds_conn_path *cp)
{
- struct rds_tcp_connection *tc = conn->c_transport_data;
+ struct rds_tcp_connection *tc = cp->cp_transport_data;
struct socket *osock = tc->t_sock;
if (!osock)
* We have an outstanding SYN to this peer, which may
* potentially have transitioned to the RDS_CONN_UP state,
* so we must quiesce any send threads before resetting
- * c_transport_data. We quiesce these threads by setting
- * c_state to something other than RDS_CONN_UP, and then
+ * cp_transport_data. We quiesce these threads by setting
+ * cp_state to something other than RDS_CONN_UP, and then
* waiting for any existing threads in rds_send_xmit to
* complete release_in_xmit(). (Subsequent threads entering
* rds_send_xmit() will bail on !rds_conn_up().
* RDS_CONN_RESETTTING, to ensure that rds_tcp_state_change
* cannot mark rds_conn_path_up() in the window before lock_sock()
*/
- atomic_set(&conn->c_state, RDS_CONN_RESETTING);
- wait_event(conn->c_waitq, !test_bit(RDS_IN_XMIT, &conn->c_flags));
+ atomic_set(&cp->cp_state, RDS_CONN_RESETTING);
+ wait_event(cp->cp_waitq, !test_bit(RDS_IN_XMIT, &cp->cp_flags));
lock_sock(osock->sk);
/* reset receive side state for rds_tcp_data_recv() for osock */
+ cancel_delayed_work_sync(&cp->cp_send_w);
+ cancel_delayed_work_sync(&cp->cp_recv_w);
if (tc->t_tinc) {
rds_inc_put(&tc->t_tinc->ti_inc);
tc->t_tinc = NULL;
}
tc->t_tinc_hdr_rem = sizeof(struct rds_header);
tc->t_tinc_data_rem = 0;
- tc->t_sock = NULL;
-
- write_lock_bh(&osock->sk->sk_callback_lock);
-
- osock->sk->sk_user_data = NULL;
- osock->sk->sk_data_ready = tc->t_orig_data_ready;
- osock->sk->sk_write_space = tc->t_orig_write_space;
- osock->sk->sk_state_change = tc->t_orig_state_change;
- write_unlock_bh(&osock->sk->sk_callback_lock);
+ rds_tcp_restore_callbacks(osock, tc);
release_sock(osock->sk);
sock_release(osock);
newsock:
- rds_send_reset(conn);
+ rds_send_path_reset(cp);
lock_sock(sock->sk);
- write_lock_bh(&sock->sk->sk_callback_lock);
- tc->t_sock = sock;
- sock->sk->sk_user_data = conn;
- sock->sk->sk_data_ready = rds_tcp_data_ready;
- sock->sk->sk_write_space = rds_tcp_write_space;
- sock->sk->sk_state_change = rds_tcp_state_change;
-
- write_unlock_bh(&sock->sk->sk_callback_lock);
+ rds_tcp_set_callbacks(sock, cp);
release_sock(sock->sk);
}
* above rds_tcp_reset_callbacks for notes about synchronization
* with data path
*/
-void rds_tcp_set_callbacks(struct socket *sock, struct rds_connection *conn)
+void rds_tcp_set_callbacks(struct socket *sock, struct rds_conn_path *cp)
{
- struct rds_tcp_connection *tc = conn->c_transport_data;
+ struct rds_tcp_connection *tc = cp->cp_transport_data;
rdsdebug("setting sock %p callbacks to tc %p\n", sock, tc);
write_lock_bh(&sock->sk->sk_callback_lock);
sock->sk->sk_data_ready = sock->sk->sk_user_data;
tc->t_sock = sock;
- tc->conn = conn;
+ tc->t_cpath = cp;
tc->t_orig_data_ready = sock->sk->sk_data_ready;
tc->t_orig_write_space = sock->sk->sk_write_space;
tc->t_orig_state_change = sock->sk->sk_state_change;
- sock->sk->sk_user_data = conn;
+ sock->sk->sk_user_data = cp;
sock->sk->sk_data_ready = rds_tcp_data_ready;
sock->sk->sk_write_space = rds_tcp_write_space;
sock->sk->sk_state_change = rds_tcp_state_change;
static int rds_tcp_conn_alloc(struct rds_connection *conn, gfp_t gfp)
{
struct rds_tcp_connection *tc;
+ int i;
- tc = kmem_cache_alloc(rds_tcp_conn_slab, gfp);
- if (!tc)
- return -ENOMEM;
+ for (i = 0; i < RDS_MPATH_WORKERS; i++) {
+ tc = kmem_cache_alloc(rds_tcp_conn_slab, gfp);
+ if (!tc)
+ return -ENOMEM;
- mutex_init(&tc->t_conn_lock);
- tc->t_sock = NULL;
- tc->t_tinc = NULL;
- tc->t_tinc_hdr_rem = sizeof(struct rds_header);
- tc->t_tinc_data_rem = 0;
+ mutex_init(&tc->t_conn_path_lock);
+ tc->t_sock = NULL;
+ tc->t_tinc = NULL;
+ tc->t_tinc_hdr_rem = sizeof(struct rds_header);
+ tc->t_tinc_data_rem = 0;
- conn->c_transport_data = tc;
+ conn->c_path[i].cp_transport_data = tc;
+ tc->t_cpath = &conn->c_path[i];
- spin_lock_irq(&rds_tcp_conn_lock);
- list_add_tail(&tc->t_tcp_node, &rds_tcp_conn_list);
- spin_unlock_irq(&rds_tcp_conn_lock);
+ spin_lock_irq(&rds_tcp_conn_lock);
+ list_add_tail(&tc->t_tcp_node, &rds_tcp_conn_list);
+ spin_unlock_irq(&rds_tcp_conn_lock);
+ rdsdebug("rds_conn_path [%d] tc %p\n", i,
+ conn->c_path[i].cp_transport_data);
+ }
- rdsdebug("alloced tc %p\n", conn->c_transport_data);
return 0;
}
kmem_cache_free(rds_tcp_conn_slab, tc);
}
+static bool list_has_conn(struct list_head *list, struct rds_connection *conn)
+{
+ struct rds_tcp_connection *tc, *_tc;
+
+ list_for_each_entry_safe(tc, _tc, list, t_tcp_node) {
+ if (tc->t_cpath->cp_conn == conn)
+ return true;
+ }
+ return false;
+}
+
static void rds_tcp_destroy_conns(void)
{
struct rds_tcp_connection *tc, *_tc;
/* avoid calling conn_destroy with irqs off */
spin_lock_irq(&rds_tcp_conn_lock);
- list_splice(&rds_tcp_conn_list, &tmp_list);
- INIT_LIST_HEAD(&rds_tcp_conn_list);
+ list_for_each_entry_safe(tc, _tc, &rds_tcp_conn_list, t_tcp_node) {
+ if (!list_has_conn(&tmp_list, tc->t_cpath->cp_conn))
+ list_move_tail(&tc->t_tcp_node, &tmp_list);
+ }
spin_unlock_irq(&rds_tcp_conn_lock);
- list_for_each_entry_safe(tc, _tc, &tmp_list, t_tcp_node) {
- if (tc->conn->c_passive)
- rds_conn_destroy(tc->conn->c_passive);
- rds_conn_destroy(tc->conn);
- }
+ list_for_each_entry_safe(tc, _tc, &tmp_list, t_tcp_node)
+ rds_conn_destroy(tc->t_cpath->cp_conn);
}
static void rds_tcp_exit(void);
struct rds_transport rds_tcp_transport = {
.laddr_check = rds_tcp_laddr_check,
- .xmit_prepare = rds_tcp_xmit_prepare,
- .xmit_complete = rds_tcp_xmit_complete,
+ .xmit_path_prepare = rds_tcp_xmit_path_prepare,
+ .xmit_path_complete = rds_tcp_xmit_path_complete,
.xmit = rds_tcp_xmit,
- .recv = rds_tcp_recv,
+ .recv_path = rds_tcp_recv_path,
.conn_alloc = rds_tcp_conn_alloc,
.conn_free = rds_tcp_conn_free,
- .conn_connect = rds_tcp_conn_connect,
- .conn_shutdown = rds_tcp_conn_shutdown,
+ .conn_path_connect = rds_tcp_conn_path_connect,
+ .conn_path_shutdown = rds_tcp_conn_path_shutdown,
.inc_copy_to_user = rds_tcp_inc_copy_to_user,
.inc_free = rds_tcp_inc_free,
.stats_info_copy = rds_tcp_stats_info_copy,
.t_name = "tcp",
.t_type = RDS_TRANS_TCP,
.t_prefer_loopback = 1,
+ .t_mp_capable = 1,
};
static int rds_tcp_netid;
.size = sizeof(struct rds_tcp_net),
};
+/* explicitly send a RST on each socket, thereby releasing any socket refcnts
+ * that may otherwise hold up netns deletion.
+ */
+static void rds_tcp_conn_paths_destroy(struct rds_connection *conn)
+{
+ struct rds_conn_path *cp;
+ struct rds_tcp_connection *tc;
+ int i;
+ struct sock *sk;
+
+ for (i = 0; i < RDS_MPATH_WORKERS; i++) {
+ cp = &conn->c_path[i];
+ tc = cp->cp_transport_data;
+ if (!tc->t_sock)
+ continue;
+ sk = tc->t_sock->sk;
+ sk->sk_prot->disconnect(sk, 0);
+ tcp_done(sk);
+ }
+}
+
static void rds_tcp_kill_sock(struct net *net)
{
struct rds_tcp_connection *tc, *_tc;
- struct sock *sk;
LIST_HEAD(tmp_list);
struct rds_tcp_net *rtn = net_generic(net, rds_tcp_netid);
flush_work(&rtn->rds_tcp_accept_w);
spin_lock_irq(&rds_tcp_conn_lock);
list_for_each_entry_safe(tc, _tc, &rds_tcp_conn_list, t_tcp_node) {
- struct net *c_net = read_pnet(&tc->conn->c_net);
+ struct net *c_net = read_pnet(&tc->t_cpath->cp_conn->c_net);
if (net != c_net || !tc->t_sock)
continue;
- list_move_tail(&tc->t_tcp_node, &tmp_list);
+ if (!list_has_conn(&tmp_list, tc->t_cpath->cp_conn))
+ list_move_tail(&tc->t_tcp_node, &tmp_list);
}
spin_unlock_irq(&rds_tcp_conn_lock);
list_for_each_entry_safe(tc, _tc, &tmp_list, t_tcp_node) {
- sk = tc->t_sock->sk;
- sk->sk_prot->disconnect(sk, 0);
- tcp_done(sk);
- if (tc->conn->c_passive)
- rds_conn_destroy(tc->conn->c_passive);
- rds_conn_destroy(tc->conn);
+ rds_tcp_conn_paths_destroy(tc->t_cpath->cp_conn);
+ rds_conn_destroy(tc->t_cpath->cp_conn);
}
}
+void *rds_tcp_listen_sock_def_readable(struct net *net)
+{
+ struct rds_tcp_net *rtn = net_generic(net, rds_tcp_netid);
+
+ return rtn->rds_tcp_listen_sock->sk->sk_user_data;
+}
+
static int rds_tcp_dev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
spin_lock_irq(&rds_tcp_conn_lock);
list_for_each_entry_safe(tc, _tc, &rds_tcp_conn_list, t_tcp_node) {
- struct net *c_net = read_pnet(&tc->conn->c_net);
+ struct net *c_net = read_pnet(&tc->t_cpath->cp_conn->c_net);
if (net != c_net || !tc->t_sock)
continue;
- rds_conn_drop(tc->conn); /* reconnect with new parameters */
+ /* reconnect with new parameters */
+ rds_conn_path_drop(tc->t_cpath);
}
spin_unlock_irq(&rds_tcp_conn_lock);
}
projects / cascardo / linux.git / blobdiff