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From: Greg Kroah-Hartman on 14 Jan 2010 17:50
From: Xiaotian Feng <dfeng(a)redhat.com>

commit b292cf9ce70d221c3f04ff62db5ab13d9a249ca8 upstream.

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 <dfeng(a)redhat.com>
Cc: J. Bruce Fields <bfields(a)fieldses.org>
Cc: Neil Brown <neilb(a)suse.de>
Cc: Trond Myklebust <Trond.Myklebust(a)netapp.com>
Cc: David S. Miller <davem(a)davemloft.net>
Cc: Nikola Ciprich <extmaillist(a)linuxbox.cz>
Signed-off-by: J. Bruce Fields <bfields(a)citi.umich.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>
---
net/sunrpc/svc_xprt.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index df124f7..0266cca 100644
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -711,7 +711,8 @@ 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) {
--
1.6.6

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Prev: [PATCH 31/52] ALSA: atiixp: Specify codec for Foxconn RC4107MA-RS2
Next: [2/9] hwmon: (adt7462) Fix pin 28 monitoring