diff options
Diffstat (limited to 'net/rxrpc/conn_client.c')
| -rw-r--r-- | net/rxrpc/conn_client.c | 43 |
1 files changed, 35 insertions, 8 deletions
diff --git a/net/rxrpc/conn_client.c b/net/rxrpc/conn_client.c index 3f358bf424ad..dd8bb919c15a 100644 --- a/net/rxrpc/conn_client.c +++ b/net/rxrpc/conn_client.c @@ -36,12 +36,15 @@ * * rxrpc_nr_active_client_conns is held incremented also. * - * (4) CULLED - The connection got summarily culled to try and free up + * (4) UPGRADE - As for ACTIVE, but only one call may be in progress and is + * being used to probe for service upgrade. + * + * (5) CULLED - The connection got summarily culled to try and free up * capacity. Calls currently in progress on the connection are allowed to * continue, but new calls will have to wait. There can be no waiters in * this state - the conn would have to go to the WAITING state instead. * - * (5) IDLE - The connection has no calls in progress upon it and must have + * (6) IDLE - The connection has no calls in progress upon it and must have * been exposed to the world (ie. the EXPOSED flag must be set). When it * expires, the EXPOSED flag is cleared and the connection transitions to * the INACTIVE state. @@ -184,6 +187,8 @@ rxrpc_alloc_client_connection(struct rxrpc_conn_parameters *cp, gfp_t gfp) atomic_set(&conn->usage, 1); if (cp->exclusive) __set_bit(RXRPC_CONN_DONT_REUSE, &conn->flags); + if (cp->upgrade) + __set_bit(RXRPC_CONN_PROBING_FOR_UPGRADE, &conn->flags); conn->params = *cp; conn->out_clientflag = RXRPC_CLIENT_INITIATED; @@ -300,7 +305,8 @@ static int rxrpc_get_client_conn(struct rxrpc_call *call, #define cmp(X) ((long)conn->params.X - (long)cp->X) diff = (cmp(peer) ?: cmp(key) ?: - cmp(security_level)); + cmp(security_level) ?: + cmp(upgrade)); #undef cmp if (diff < 0) { p = p->rb_left; @@ -365,7 +371,8 @@ static int rxrpc_get_client_conn(struct rxrpc_call *call, #define cmp(X) ((long)conn->params.X - (long)candidate->params.X) diff = (cmp(peer) ?: cmp(key) ?: - cmp(security_level)); + cmp(security_level) ?: + cmp(upgrade)); #undef cmp if (diff < 0) { pp = &(*pp)->rb_left; @@ -436,8 +443,13 @@ error: static void rxrpc_activate_conn(struct rxrpc_net *rxnet, struct rxrpc_connection *conn) { - trace_rxrpc_client(conn, -1, rxrpc_client_to_active); - conn->cache_state = RXRPC_CONN_CLIENT_ACTIVE; + if (test_bit(RXRPC_CONN_PROBING_FOR_UPGRADE, &conn->flags)) { + trace_rxrpc_client(conn, -1, rxrpc_client_to_upgrade); + conn->cache_state = RXRPC_CONN_CLIENT_UPGRADE; + } else { + trace_rxrpc_client(conn, -1, rxrpc_client_to_active); + conn->cache_state = RXRPC_CONN_CLIENT_ACTIVE; + } rxnet->nr_active_client_conns++; list_move_tail(&conn->cache_link, &rxnet->active_client_conns); } @@ -461,7 +473,8 @@ static void rxrpc_animate_client_conn(struct rxrpc_net *rxnet, _enter("%d,%d", conn->debug_id, conn->cache_state); - if (conn->cache_state == RXRPC_CONN_CLIENT_ACTIVE) + if (conn->cache_state == RXRPC_CONN_CLIENT_ACTIVE || + conn->cache_state == RXRPC_CONN_CLIENT_UPGRADE) goto out; spin_lock(&rxnet->client_conn_cache_lock); @@ -474,6 +487,7 @@ static void rxrpc_animate_client_conn(struct rxrpc_net *rxnet, switch (conn->cache_state) { case RXRPC_CONN_CLIENT_ACTIVE: + case RXRPC_CONN_CLIENT_UPGRADE: case RXRPC_CONN_CLIENT_WAITING: break; @@ -577,6 +591,9 @@ static void rxrpc_activate_channels_locked(struct rxrpc_connection *conn) case RXRPC_CONN_CLIENT_ACTIVE: mask = RXRPC_ACTIVE_CHANS_MASK; break; + case RXRPC_CONN_CLIENT_UPGRADE: + mask = 0x01; + break; default: return; } @@ -787,6 +804,15 @@ void rxrpc_disconnect_client_call(struct rxrpc_call *call) spin_lock(&rxnet->client_conn_cache_lock); switch (conn->cache_state) { + case RXRPC_CONN_CLIENT_UPGRADE: + /* Deal with termination of a service upgrade probe. */ + if (test_bit(RXRPC_CONN_EXPOSED, &conn->flags)) { + clear_bit(RXRPC_CONN_PROBING_FOR_UPGRADE, &conn->flags); + trace_rxrpc_client(conn, channel, rxrpc_client_to_active); + conn->cache_state = RXRPC_CONN_CLIENT_ACTIVE; + rxrpc_activate_channels_locked(conn); + } + /* fall through */ case RXRPC_CONN_CLIENT_ACTIVE: if (list_empty(&conn->waiting_calls)) { rxrpc_deactivate_one_channel(conn, channel); @@ -941,7 +967,8 @@ static void rxrpc_cull_active_client_conns(struct rxrpc_net *rxnet) ASSERT(!list_empty(&rxnet->active_client_conns)); conn = list_entry(rxnet->active_client_conns.next, struct rxrpc_connection, cache_link); - ASSERTCMP(conn->cache_state, ==, RXRPC_CONN_CLIENT_ACTIVE); + ASSERTIFCMP(conn->cache_state != RXRPC_CONN_CLIENT_ACTIVE, + conn->cache_state, ==, RXRPC_CONN_CLIENT_UPGRADE); if (list_empty(&conn->waiting_calls)) { trace_rxrpc_client(conn, -1, rxrpc_client_to_culled); |