NFSv4.1: Fix matching of the stateids when returning a delegation

nfs41_validate_delegation_stateid is broken if we supply a stateid with
a non-zero sequence id. Instead of trying to match the sequence id,
the function assumes that we always want to error. While this is
true for a delegation callback, it is not true in general.

Also fix a typo in nfs4_callback_recall.

Reported-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

2 files changed, 6 insertions, 6 deletions

diff --git a/fs/nfs/callback_proc.c b/fs/nfs/callback_proc.c
index 1bb297243624..ea8321923f28 100644
--- a/fs/nfs/callback_proc.c
+++ b/fs/nfs/callback_proc.c
@@ -87,8 +87,7 @@ __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy,
                 res = 0;
                 break;
         case -ENOENT:
-                if (res != 0)
-                        res = htonl(NFS4ERR_BAD_STATEID);
+                res = htonl(NFS4ERR_BAD_STATEID);
                 break;
         default:
                 res = htonl(NFS4ERR_RESOURCE);
@@ -325,10 +324,11 @@ int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, const n
         if (delegation == NULL)
                 return 0;
 
-        if (stateid->stateid.seqid != 0)
+        if (stateid->stateid.seqid != 0 &&
+            stateid->stateid.seqid != delegation->stateid.stateid.seqid)
                 return 0;
-        if (memcmp(&delegation->stateid.stateid.other,
-                   &stateid->stateid.other,
+        if (memcmp(delegation->stateid.stateid.other,
+                   stateid->stateid.other,
                    NFS4_STATEID_OTHER_SIZE))
                 return 0;
 
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index ac889af8ccf5..c14512cea798 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -542,7 +542,7 @@ void nfs_expire_unreferenced_delegations(struct nfs_client *clp)
 /**
  * nfs_async_inode_return_delegation - asynchronously return a delegation
  * @inode: inode to process
- * @stateid: state ID information from CB_RECALL arguments
+ * @stateid: state ID information
  *
  * Returns zero on success, or a negative errno value.
  */