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SUNRPC: Handle connection reset more efficiently.

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If the connection reset is due to an active call on our side, then
the state change is sometimes not reported. Catch those instances
using xs_error_report() instead.
Also remove the xs_tcp_shutdown() call in xs_tcp_send_request() as
the change in behaviour makes it redundant.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2015-02-09 09:41:32 -05:00
parent 9e2b9f3776
commit b70ae915e4
1 changed files with 18 additions and 16 deletions
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34
net/sunrpc/xprtsock.c
View file

@ -718,7 +718,6 @@ static int xs_tcp_send_request(struct rpc_task *task)
dprintk("RPC: sendmsg returned unrecognized error %d\n",
-status);
case -ECONNRESET:
xs_tcp_shutdown(xprt);
case -ECONNREFUSED:
case -ENOTCONN:
case -EADDRINUSE:
@ -774,6 +773,21 @@ static void xs_restore_old_callbacks(struct sock_xprt *transport, struct sock *s
sk->sk_error_report = transport->old_error_report;
}
static void xs_sock_reset_connection_flags(struct rpc_xprt *xprt)
{
smp_mb__before_atomic();
clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
clear_bit(XPRT_CLOSING, &xprt->state);
smp_mb__after_atomic();
}
static void xs_sock_mark_closed(struct rpc_xprt *xprt)
{
xs_sock_reset_connection_flags(xprt);
/* Mark transport as closed and wake up all pending tasks */
xprt_disconnect_done(xprt);
}
/**
* xs_error_report - callback to handle TCP socket state errors
* @sk: socket
@ -793,6 +807,9 @@ static void xs_error_report(struct sock *sk)
err = -sk->sk_err;
if (err == 0)
goto out;
/* Is this a reset event? */
if (sk->sk_state == TCP_CLOSE)
xs_sock_mark_closed(xprt);
dprintk("RPC: xs_error_report client %p, error=%d...\n",
xprt, -err);
trace_rpc_socket_error(xprt, sk->sk_socket, err);
@ -801,14 +818,6 @@ static void xs_error_report(struct sock *sk)
read_unlock_bh(&sk->sk_callback_lock);
}
static void xs_sock_reset_connection_flags(struct rpc_xprt *xprt)
{
smp_mb__before_atomic();
clear_bit(XPRT_CLOSE_WAIT, &xprt->state);
clear_bit(XPRT_CLOSING, &xprt->state);
smp_mb__after_atomic();
}
static void xs_reset_transport(struct sock_xprt *transport)
{
struct socket *sock = transport->sock;
@ -1421,13 +1430,6 @@ out:
read_unlock_bh(&sk->sk_callback_lock);
}
static void xs_sock_mark_closed(struct rpc_xprt *xprt)
{
xs_sock_reset_connection_flags(xprt);
/* Mark transport as closed and wake up all pending tasks */
xprt_disconnect_done(xprt);
}
/**
* xs_tcp_state_change - callback to handle TCP socket state changes
* @sk: socket whose state has changed