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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-09-12 16:49:15 -0400 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2012-10-17 03:48:37 +0100 |
| commit | 4dad484180d610ab1ce8f87124526c05f7d71d74 (patch) | |
| tree | 4d4c5b8da92460d20e277c713883170b3439e909 /net/sunrpc | |
| parent | 20a94a21d7cc392568e70c945983ecf5a79851ff (diff) | |
| download | kernel_samsung_smdk4412-4dad484180d610ab1ce8f87124526c05f7d71d74.zip kernel_samsung_smdk4412-4dad484180d610ab1ce8f87124526c05f7d71d74.tar.gz kernel_samsung_smdk4412-4dad484180d610ab1ce8f87124526c05f7d71d74.tar.bz2 | |
SUNRPC: Ensure that the TCP socket is closed when in CLOSE_WAIT
commit a519fc7a70d1a918574bb826cc6905b87b482eb9 upstream.
Instead of doing a shutdown() call, we need to do an actual close().
Ditto if/when the server is sending us junk RPC headers.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Tested-by: Simon Kirby <sim@hostway.ca>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net/sunrpc')
| -rw-r--r-- | net/sunrpc/xprtsock.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index c5391af..10a385b 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -1028,6 +1028,16 @@ static void xs_udp_data_ready(struct sock *sk, int len) read_unlock_bh(&sk->sk_callback_lock); } +/* + * Helper function to force a TCP close if the server is sending + * junk and/or it has put us in CLOSE_WAIT + */ +static void xs_tcp_force_close(struct rpc_xprt *xprt) +{ + set_bit(XPRT_CONNECTION_CLOSE, &xprt->state); + xprt_force_disconnect(xprt); +} + static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, struct xdr_skb_reader *desc) { struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); @@ -1054,7 +1064,7 @@ static inline void xs_tcp_read_fraghdr(struct rpc_xprt *xprt, struct xdr_skb_rea /* Sanity check of the record length */ if (unlikely(transport->tcp_reclen < 8)) { dprintk("RPC: invalid TCP record fragment length\n"); - xprt_force_disconnect(xprt); + xs_tcp_force_close(xprt); return; } dprintk("RPC: reading TCP record fragment of length %d\n", @@ -1135,7 +1145,7 @@ static inline void xs_tcp_read_calldir(struct sock_xprt *transport, break; default: dprintk("RPC: invalid request message type\n"); - xprt_force_disconnect(&transport->xprt); + xs_tcp_force_close(&transport->xprt); } xs_tcp_check_fraghdr(transport); } @@ -1458,6 +1468,8 @@ static void xs_tcp_cancel_linger_timeout(struct rpc_xprt *xprt) static void xs_sock_mark_closed(struct rpc_xprt *xprt) { smp_mb__before_clear_bit(); + clear_bit(XPRT_CONNECTION_ABORT, &xprt->state); + clear_bit(XPRT_CONNECTION_CLOSE, &xprt->state); clear_bit(XPRT_CLOSE_WAIT, &xprt->state); clear_bit(XPRT_CLOSING, &xprt->state); smp_mb__after_clear_bit(); @@ -1515,8 +1527,8 @@ static void xs_tcp_state_change(struct sock *sk) break; case TCP_CLOSE_WAIT: /* The server initiated a shutdown of the socket */ - xprt_force_disconnect(xprt); xprt->connect_cookie++; + xs_tcp_force_close(xprt); case TCP_CLOSING: /* * If the server closed down the connection, make sure that @@ -2159,8 +2171,7 @@ static void xs_tcp_setup_socket(struct work_struct *work) /* We're probably in TIME_WAIT. Get rid of existing socket, * and retry */ - set_bit(XPRT_CONNECTION_CLOSE, &xprt->state); - xprt_force_disconnect(xprt); + xs_tcp_force_close(xprt); break; case -ECONNREFUSED: case -ECONNRESET: |