nfsd4: give out delegations more quickly in 4.1 case

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

1 files changed, 15 insertions, 2 deletions

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 00a50b8ac878..408957cf6016 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -2627,6 +2627,19 @@ nfs4_set_claim_prev(struct nfsd4_open *open)
         open->op_stateowner->so_client->cl_firststate = 1;
 }
 
+/* Should we give out recallable state?: */
+static bool nfsd4_cb_channel_good(struct nfs4_client *clp)
+{
+        if (clp->cl_cb_state == NFSD4_CB_UP)
+                return true;
+        /*
+         * In the sessions case, since we don't have to establish a
+         * separate connection for callbacks, we assume it's OK
+         * until we hear otherwise:
+         */
+        return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN;
+}
+
 /*
  * Attempt to hand out a delegation.
  */
@@ -2635,11 +2648,11 @@ nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_sta
 {
         struct nfs4_delegation *dp;
         struct nfs4_stateowner *sop = stp->st_stateowner;
-        /* XXX: or unknown and nfsv4.1: */
-        int cb_up = (sop->so_client->cl_cb_state == NFSD4_CB_UP);
+        int cb_up;
         struct file_lock *fl;
         int status, flag = 0;
 
+        cb_up = nfsd4_cb_channel_good(sop->so_client);
         flag = NFS4_OPEN_DELEGATE_NONE;
         open->op_recall = 0;
         switch (open->op_claim_type) {