Re: [PATCH 1/2] mount: ECONNREFUSED is a permanent error

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On Nov 16, 2009, at 1:13 PM, Steve Dickson wrote:



On 10/08/2009 01:37 PM, Chuck Lever wrote:
I had assumed early on that mount.nfs should retry a refused connection.

Apparently this is not the case.  Legacy mount.nfs4 fails immediately
if the NFS server refuses the connection.  Legacy mount.nfs and
text-based mount.nfs both fail immediately if the rpcbind service is
refusing connections.

So, banish ECONNREFUSED returns from mount(2) to the domain of
permanent errors.

Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
---

utils/mount/stropts.c |    1 -
1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/utils/mount/stropts.c b/utils/mount/stropts.c
index 069bdc1..0685caa 100644
--- a/utils/mount/stropts.c
+++ b/utils/mount/stropts.c
@@ -639,7 +639,6 @@ static int nfs_is_permanent_error(int error)
	switch (error) {
	case ESTALE:
	case ETIMEDOUT:
-	case ECONNREFUSED:
		return 0;	/* temporary */
	default:
		return 1;	/* permanent */

I'm going to hold of on this one... I just think we should
continue to try on ECONNREFUSED errors until the retry timer pops...

I thought we had agreed that ECONNREFUSED should be retried (ie this particular patch was vetoed a while ago). Currently it is retried for NFSv4, but not for NFSv2/3, and I have a patch that makes v2/v3 retry.

--
Chuck Lever
chuck[dot]lever[at]oracle[dot]com



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