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authorTrond Myklebust <Trond.Myklebust@netapp.com>2009-10-23 22:46:42 +0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2009-10-23 22:46:42 +0400
commit52567b03ca38b6e556ced450d64dba8d66e23b0e (patch)
treea08e14e2a8ab8c69e80eb5ea6208d473b1254582 /fs
parenta8b40bc7e635831b61c43acc71a86d3a68b2dff0 (diff)
downloadlinux-52567b03ca38b6e556ced450d64dba8d66e23b0e.tar.xz
NFSv4: Fix a bug when the server returns NFS4ERR_RESOURCE
RFC 3530 states that when we recieve the error NFS4ERR_RESOURCE, we are not supposed to bump the sequence number on OPEN, LOCK, LOCKU, CLOSE, etc operations. The problem is that we map that error into EREMOTEIO in the XDR layer, and so the NFSv4 middle-layer routines like seqid_mutating_err(), and nfs_increment_seqid() don't recognise it. The fix is to defer the mapping until after the middle layers have processed the error. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/nfs4proc.c11
-rw-r--r--fs/nfs/nfs4xdr.c1
2 files changed, 8 insertions, 4 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index ed7c269e2514..65c252798861 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -72,12 +72,17 @@ static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
/* Prevent leaks of NFSv4 errors into userland */
static int nfs4_map_errors(int err)
{
- if (err < -1000) {
+ if (err >= -1000)
+ return err;
+ switch (err) {
+ case -NFS4ERR_RESOURCE:
+ return -EREMOTEIO;
+ default:
dprintk("%s could not handle NFSv4 error %d\n",
__func__, -err);
- return -EIO;
+ break;
}
- return err;
+ return -EIO;
}
/*
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 83ad47cbdd8a..20b4e30e6c82 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -5681,7 +5681,6 @@ static struct {
{ NFS4ERR_SERVERFAULT, -ESERVERFAULT },
{ NFS4ERR_BADTYPE, -EBADTYPE },
{ NFS4ERR_LOCKED, -EAGAIN },
- { NFS4ERR_RESOURCE, -EREMOTEIO },
{ NFS4ERR_SYMLINK, -ELOOP },
{ NFS4ERR_OP_ILLEGAL, -EOPNOTSUPP },
{ NFS4ERR_DEADLOCK, -EDEADLK },