SUNRPC: Report connection error values to rpc_tasks on the pending queue
Currently we only report EAGAIN, which is not descriptive enough for softconn tasks. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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@ -257,6 +257,7 @@ struct sock_xprt {
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void (*old_data_ready)(struct sock *, int);
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void (*old_state_change)(struct sock *);
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void (*old_write_space)(struct sock *);
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void (*old_error_report)(struct sock *);
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};
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/*
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@ -274,6 +275,11 @@ struct sock_xprt {
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*/
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#define TCP_RPC_REPLY (1UL << 6)
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static inline struct rpc_xprt *xprt_from_sock(struct sock *sk)
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{
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return (struct rpc_xprt *) sk->sk_user_data;
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}
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static inline struct sockaddr *xs_addr(struct rpc_xprt *xprt)
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{
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return (struct sockaddr *) &xprt->addr;
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@ -799,6 +805,7 @@ static void xs_save_old_callbacks(struct sock_xprt *transport, struct sock *sk)
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transport->old_data_ready = sk->sk_data_ready;
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transport->old_state_change = sk->sk_state_change;
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transport->old_write_space = sk->sk_write_space;
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transport->old_error_report = sk->sk_error_report;
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}
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static void xs_restore_old_callbacks(struct sock_xprt *transport, struct sock *sk)
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@ -806,6 +813,33 @@ static void xs_restore_old_callbacks(struct sock_xprt *transport, struct sock *s
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sk->sk_data_ready = transport->old_data_ready;
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sk->sk_state_change = transport->old_state_change;
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sk->sk_write_space = transport->old_write_space;
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sk->sk_error_report = transport->old_error_report;
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}
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/**
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* xs_error_report - callback to handle TCP socket state errors
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* @sk: socket
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*
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* Note: we don't call sock_error() since there may be a rpc_task
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* using the socket, and so we don't want to clear sk->sk_err.
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*/
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static void xs_error_report(struct sock *sk)
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{
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struct rpc_xprt *xprt;
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int err;
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read_lock_bh(&sk->sk_callback_lock);
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if (!(xprt = xprt_from_sock(sk)))
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goto out;
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err = -sk->sk_err;
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if (err == 0)
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goto out;
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dprintk("RPC: xs_error_report client %p, error=%d...\n",
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xprt, -err);
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xprt_wake_pending_tasks(xprt, err);
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out:
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read_unlock_bh(&sk->sk_callback_lock);
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}
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static void xs_reset_transport(struct sock_xprt *transport)
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@ -885,11 +919,6 @@ static void xs_destroy(struct rpc_xprt *xprt)
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module_put(THIS_MODULE);
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}
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static inline struct rpc_xprt *xprt_from_sock(struct sock *sk)
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{
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return (struct rpc_xprt *) sk->sk_user_data;
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}
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static int xs_local_copy_to_xdr(struct xdr_buf *xdr, struct sk_buff *skb)
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{
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struct xdr_skb_reader desc = {
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@ -1869,6 +1898,7 @@ static int xs_local_finish_connecting(struct rpc_xprt *xprt,
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sk->sk_user_data = xprt;
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sk->sk_data_ready = xs_local_data_ready;
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sk->sk_write_space = xs_udp_write_space;
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sk->sk_error_report = xs_error_report;
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sk->sk_allocation = GFP_ATOMIC;
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xprt_clear_connected(xprt);
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@ -2146,6 +2176,7 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
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sk->sk_data_ready = xs_tcp_data_ready;
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sk->sk_state_change = xs_tcp_state_change;
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sk->sk_write_space = xs_tcp_write_space;
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sk->sk_error_report = xs_error_report;
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sk->sk_allocation = GFP_ATOMIC;
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/* socket options */
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