From: Olga Kornievskaia <kolga@xxxxxxxxxx>
Incoming stateid (used by a READ) could be a saved copy stateid.
On first use make it active and check that the copy has started
within the allowable lease time.
Signed-off-by: Olga Kornievskaia <kolga@xxxxxxxxxx>
---
fs/nfsd/nfs4state.c | 43 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 7764a8b..16359de 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -5206,6 +5206,47 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
return 0;
}
+/*
+ * A READ from an inter server to server COPY will have a
+ * copy stateid. Return the parent nfs4_stid.
+ */
+static __be32 _find_cpntf_state(struct nfsd_net *nn, stateid_t *st,
+ struct nfs4_cpntf_state **cps)
+{
+ struct nfs4_cpntf_state *state = NULL;
+
+ if (st->si_opaque.so_clid.cl_id != nn->s2s_cp_cl_id)
+ return nfserr_bad_stateid;
+ spin_lock(&nn->s2s_cp_lock);
+ state = idr_find(&nn->s2s_cp_stateids, st->si_opaque.so_id);
+ spin_unlock(&nn->s2s_cp_lock);
+ if (!state)
+ return nfserr_bad_stateid;
+ *cps = state;
+ return 0;
+}
+
+static __be32 find_cpntf_state(struct nfsd_net *nn, stateid_t *st,
+ struct nfs4_stid **stid)
+{
+ __be32 status;
+ struct nfs4_cpntf_state *cps = NULL;
+
+ status = _find_cpntf_state(nn, st, &cps);
+ if (status)
+ return status;
+
+ /* Did the inter server to server copy start in time? */
+ if (cps->cp_active == false && !time_after(cps->cp_timeout, jiffies))
+ return nfserr_partner_no_auth;
+ else
+ cps->cp_active = true;
+
+ *stid = cps->cp_p_stid;
+ refcount_inc(&cps->cp_p_stid->sc_count);
+
+ return nfs_ok;
+}
/*
* Checks for stateid operations
@@ -5238,6 +5279,8 @@ static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid)
status = nfsd4_lookup_stateid(cstate, stateid,
NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID,
&s, nn);
+ if (status == nfserr_bad_stateid)
+ status = find_cpntf_state(nn, stateid, &s);
if (status)
return status;
status = nfsd4_stid_check_stateid_generation(stateid, s,
--
1.8.3.1
