[pnfs] [PATCH 2/4] Set the exchange_id flags returned by the NFSv4.1 server

[andros at umich.edu]

From: Andy Adamson <andros at umich.edu>

Set the minimal exchange_id flags for sessions only (no pnfs).

The NFSv4.1 server MUST set referral flags if referrals are supported, and MUST
set at least one pNFS exchange_id flag.

Signed-off by: Andy Adamson <andros at citi.umich.edu>
---
 fs/nfsd/nfs4state.c |   20 +++++++++++++++++++-
 1 files changed, 19 insertions(+), 1 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 575c8fb..9815ff3 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1052,6 +1052,24 @@ void nfsd4_setup_callback_channel(void)
 }
 
 #if defined(CONFIG_NFSD_V4_1)
+/*
+ * Set the exchange_id flags returned by the server.
+ */
+void
+nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid)
+{
+	/* if sessions only, ignore the wire_flags from client */
+
+	/* Referrals are supported, Migration is not. */
+	new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER;
+
+	/* pNFS is not supported */
+	new->cl_exchange_flags |=  EXCHGID4_FLAG_USE_NON_PNFS;
+
+	/* set the wire flags to return to client. */
+	clid->flags = new->cl_exchange_flags;
+}
+
 int nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_exchange_id *clid)
 {
         struct nfs4_client *unconf, *conf, *new;
@@ -1136,7 +1154,7 @@ out_copy:
         clid->clientid.cl_id = new->cl_clientid.cl_id;
 
         new->cl_seqid = clid->seqid = 1;
-	new->cl_exchange_flags = clid->flags;
+	nfsd4_set_ex_flags(new, clid);
 
         status = nfs_ok;
 
-- 
1.5.0.2