nfsd: CLOSE SHOULD return the invalid special stateid for NFSv4.x (x>0)

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 457f0e7ece74..afc04b9784a0 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -63,6 +63,9 @@ static const stateid_t zero_stateid = {
 static const stateid_t currentstateid = {
         .si_generation = 1,
 };
+static const stateid_t close_stateid = {
+        .si_generation = 0xffffffffU,
+};
 
 static u64 current_sessionid = 1;
 
@@ -5461,6 +5464,11 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
         nfsd4_close_open_stateid(stp);
         mutex_unlock(&stp->st_mutex);
 
+        /* See RFC5661 sectionm 18.2.4 */
+        if (stp->st_stid.sc_client->cl_minorversion)
+                memcpy(&close->cl_stateid, &close_stateid,
+                                sizeof(close->cl_stateid));
+
         /* put reference from nfs4_preprocess_seqid_op */
         nfs4_put_stid(&stp->st_stid);
 out: