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sunrpc: fix peername failed on closed listener

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There're some warnings of "nfsd: peername failed (err 107)!"
socket error -107 means Transport endpoint is not connected.
This warning message was outputed by svc_tcp_accept() [net/sunrpc/svcsock.c],
when kernel_getpeername returns -107. This means socket might be CLOSED.

And svc_tcp_accept was called by svc_recv() [net/sunrpc/svc_xprt.c]

        if (test_bit(XPT_LISTENER, &xprt->xpt_flags)) {
        <snip>
                newxpt = xprt->xpt_ops->xpo_accept(xprt);
        <snip>

So this might happen when xprt->xpt_flags has both XPT_LISTENER and XPT_CLOSE.

Let's take a look at commit b0401d72, this commit has moved the close
processing after do recvfrom method, but this commit also introduces this
warnings, if the xpt_flags has both XPT_LISTENER and XPT_CLOSED, we should
close it, not accpet then close.

Signed-off-by: Xiaotian Feng <[email protected]>
Cc: J. Bruce Fields <[email protected]>
Cc: Neil Brown <[email protected]>
Cc: Trond Myklebust <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: [email protected]
Signed-off-by: J. Bruce Fields <[email protected]>
This commit is contained in:
Xiaotian Feng 2009-12-31 10:52:36 +08:00 • committed by J. Bruce Fields
commit b292cf9ce7
1 changed files with 2 additions and 1 deletions
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3
net/sunrpc/svc_xprt.c
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@ -699,7 +699,8 @@ int svc_recv(struct svc_rqst *rqstp, long timeout)
spin_unlock_bh(&pool->sp_lock);
len = 0;
if (test_bit(XPT_LISTENER, &xprt->xpt_flags)) {
if (test_bit(XPT_LISTENER, &xprt->xpt_flags) &&
!test_bit(XPT_CLOSE, &xprt->xpt_flags)) {
struct svc_xprt *newxpt;
newxpt = xprt->xpt_ops->xpo_accept(xprt);
if (newxpt) {