Hi, We've found a softlockup on the nfsv3 client (udp), while testing an iptables rule, which simply drops traffic destined for the nfs server. The softlockup occurs because xs_sendpages() returns a positive result (resulting in an -EAGAIN), masking out the -EPERM that the lower level ip code returns. The first patch restructures xs_sendpages() such that it can return a 'sent' value in addition to an error value. It no longer over-loads the return value as both a 'sent' and 'error' value. In this way the 'higher' level code can make more informed decisions. This patch is intended to be a no-op. The second patch makes use of the new return value to propagate the -EPERM up instead of the -EAGAIN. Thanks, -Jason Jason Baron (2): rpc: return sent and err from xs_sendpages() rpc: Add -EPERM processing for xs_udp_send_request() net/sunrpc/clnt.c | 2 ++ net/sunrpc/xprtsock.c | 86 ++++++++++++++++++++++++++++----------------------- 2 files changed, 49 insertions(+), 39 deletions(-) -- 1.8.2.rc2 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
