From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Mon, 28 May 2012 15:36:28 +0000 (-0400)
Subject: NFSv4: Map NFS4ERR_SHARE_DENIED into an EACCES error instead of EIO
X-Git-Tag: firefly_0821_release~7541^2~1102
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6ab5902511d32b50b4b973320979ba99693aa5be;p=firefly-linux-kernel-4.4.55.git

NFSv4: Map NFS4ERR_SHARE_DENIED into an EACCES error instead of EIO

commit fb13bfa7e1bcfdcfdece47c24b62f1a1cad957e9 upstream.

If a file OPEN is denied due to a share lock, the resulting
NFS4ERR_SHARE_DENIED is currently mapped to the default EIO.
This patch adds a more appropriate mapping, and brings Linux
into line with what Solaris 10 does.

See https://bugzilla.kernel.org/show_bug.cgi?id=43286

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 30f6548f2b99..b7a7e5fe4019 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -94,6 +94,8 @@ static int nfs4_map_errors(int err)
 	case -NFS4ERR_BADOWNER:
 	case -NFS4ERR_BADNAME:
 		return -EINVAL;
+	case -NFS4ERR_SHARE_DENIED:
+		return -EACCES;
 	default:
 		dprintk("%s could not handle NFSv4 error %d\n",
 				__func__, -err);