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SUNRPC: Handle EADDRNOTAVAIL on connection failures

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If the connect attempt immediately fails with an EADDRNOTAVAIL error, then
that means our choice of source port number was bad.
This error is expected when we set the SO_REUSEPORT socket option and we
have 2 sockets sharing the same source and destination address and port
combinations.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Fixes: 402e23b4ed ("SUNRPC: Fix stupid typo in xs_sock_set_reuseport")
Cc: stable@vger.kernel.org # v4.0+
This commit is contained in:
Trond Myklebust 2016-08-01 13:36:08 -04:00
parent 944171cbf4
commit 1f4c17a03b
1 changed files with 4 additions and 0 deletions
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4
net/sunrpc/xprtsock.c
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@ -2295,6 +2295,10 @@ static int xs_tcp_finish_connecting(struct rpc_xprt *xprt, struct socket *sock)
/* SYN_SENT! */
if (xprt->reestablish_timeout < XS_TCP_INIT_REEST_TO)
xprt->reestablish_timeout = XS_TCP_INIT_REEST_TO;
break;
case -EADDRNOTAVAIL:
/* Source port number is unavailable. Try a new one! */
transport->srcport = 0;
}
out:
return ret;