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authorDavid Howells <dhowells@redhat.com>2017-11-24 13:18:42 +0300
committerDavid Howells <dhowells@redhat.com>2017-11-24 13:18:42 +0300
commitf859ab61875978eeaa539740ff7f7d91f5d60006 (patch)
tree9b8bccaeda8d2fab8a774e0e818dbff3868770b1 /net/rxrpc/af_rxrpc.c
parent415f44e43282a16ec0808c7ccfd401762e587437 (diff)
downloadlinux-f859ab61875978eeaa539740ff7f7d91f5d60006.tar.xz
rxrpc: Fix service endpoint expiry
RxRPC service endpoints expire like they're supposed to by the following means: (1) Mark dead rxrpc_net structs (with ->live) rather than twiddling the global service conn timeout, otherwise the first rxrpc_net struct to die will cause connections on all others to expire immediately from then on. (2) Mark local service endpoints for which the socket has been closed (->service_closed) so that the expiration timeout can be much shortened for service and client connections going through that endpoint. (3) rxrpc_put_service_conn() needs to schedule the reaper when the usage count reaches 1, not 0, as idle conns have a 1 count. (4) The accumulator for the earliest time we might want to schedule for should be initialised to jiffies + MAX_JIFFY_OFFSET, not ULONG_MAX as the comparison functions use signed arithmetic. (5) Simplify the expiration handling, adding the expiration value to the idle timestamp each time rather than keeping track of the time in the past before which the idle timestamp must go to be expired. This is much easier to read. (6) Ignore the timeouts if the net namespace is dead. (7) Restart the service reaper work item rather the client reaper. Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'net/rxrpc/af_rxrpc.c')
-rw-r--r--net/rxrpc/af_rxrpc.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c
index c0cdcf980ffc..abb524c2b8f8 100644
--- a/net/rxrpc/af_rxrpc.c
+++ b/net/rxrpc/af_rxrpc.c
@@ -867,6 +867,19 @@ static int rxrpc_release_sock(struct sock *sk)
sock_orphan(sk);
sk->sk_shutdown = SHUTDOWN_MASK;
+ /* We want to kill off all connections from a service socket
+ * as fast as possible because we can't share these; client
+ * sockets, on the other hand, can share an endpoint.
+ */
+ switch (sk->sk_state) {
+ case RXRPC_SERVER_BOUND:
+ case RXRPC_SERVER_BOUND2:
+ case RXRPC_SERVER_LISTENING:
+ case RXRPC_SERVER_LISTEN_DISABLED:
+ rx->local->service_closed = true;
+ break;
+ }
+
spin_lock_bh(&sk->sk_receive_queue.lock);
sk->sk_state = RXRPC_CLOSE;
spin_unlock_bh(&sk->sk_receive_queue.lock);