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SUNRPC: Ensure timely close of disconnected AF_LOCAL sockets

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When the rpcbind server closes the socket, we need to ensure that the
socket is closed by the kernel as soon as feasible, so add a
sk_state_change callback to trigger this close.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Trond Myklebust 2022-04-28 11:15:08 -04:00
parent aad41a7d7c
commit efce2d0ba6
1 changed files with 21 additions and 0 deletions
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21
net/sunrpc/xprtsock.c
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@ -1418,6 +1418,26 @@ static size_t xs_tcp_bc_maxpayload(struct rpc_xprt *xprt)
}
#endif /* CONFIG_SUNRPC_BACKCHANNEL */
/**
* xs_local_state_change - callback to handle AF_LOCAL socket state changes
* @sk: socket whose state has changed
*
*/
static void xs_local_state_change(struct sock *sk)
{
struct rpc_xprt *xprt;
struct sock_xprt *transport;
if (!(xprt = xprt_from_sock(sk)))
return;
transport = container_of(xprt, struct sock_xprt, xprt);
if (sk->sk_shutdown & SHUTDOWN_MASK) {
clear_bit(XPRT_CONNECTED, &xprt->state);
/* Trigger the socket release */
xs_run_error_worker(transport, XPRT_SOCK_WAKE_DISCONNECT);
}
}
/**
* xs_tcp_state_change - callback to handle TCP socket state changes
* @sk: socket whose state has changed
@ -1866,6 +1886,7 @@ static int xs_local_finish_connecting(struct rpc_xprt *xprt,
sk->sk_user_data = xprt;
sk->sk_data_ready = xs_data_ready;
sk->sk_write_space = xs_udp_write_space;
sk->sk_state_change = xs_local_state_change;
sk->sk_error_report = xs_error_report;
xprt_clear_connected(xprt);