[PATCH v7 03/20] nfs_common: add new NOTIFY4_* flags proposed in RFC8881bis

[Jeff Layton]

RFC8881bis adds some new flags to GET_DIR_DELEGATION that later patches
will consume. In particular, Linux nfsd can't easily provide info about
directory cookies and ordering. The new flags allow it to omit that
information.

There is some risk here -- RFC8881bis is still a working group document,
and has been for years. The changes to directory delegations have been
stable for the last year or so however, so the hope is that those parts
won't change (much).

Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
 Documentation/sunrpc/xdr/nfs4_1.x    | 14 +++++++++++++-
 fs/nfsd/nfs4xdr_gen.c                | 11 +++++++++++
 include/linux/sunrpc/xdrgen/nfs4_1.h | 11 +++++++++++
 3 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/Documentation/sunrpc/xdr/nfs4_1.x b/Documentation/sunrpc/xdr/nfs4_1.x
index 72d439b71735..4c3842e23859 100644
--- a/Documentation/sunrpc/xdr/nfs4_1.x
+++ b/Documentation/sunrpc/xdr/nfs4_1.x
@@ -413,7 +413,19 @@ enum notify_type4 {
         NOTIFY4_REMOVE_ENTRY = 2,
         NOTIFY4_ADD_ENTRY = 3,
         NOTIFY4_RENAME_ENTRY = 4,
-        NOTIFY4_CHANGE_COOKIE_VERIFIER = 5
+        NOTIFY4_CHANGE_COOKIE_VERIFIER = 5,
+        /* Proposed in RFC8881bis */
+        NOTIFY4_GFLAG_EXTEND = 6,
+        NOTIFY4_AUFLAG_VALID = 7,
+        NOTIFY4_AUFLAG_USER = 8,
+        NOTIFY4_AUFLAG_GROUP = 9,
+        NOTIFY4_AUFLAG_OTHER = 10,
+        NOTIFY4_CHANGE_AUTH = 11,
+        NOTIFY4_CFLAG_ORDER = 12,
+        NOTIFY4_AUFLAG_GANOW = 13,
+        NOTIFY4_AUFLAG_GALATER = 14,
+        NOTIFY4_CHANGE_GA = 15,
+        NOTIFY4_CHANGE_AMASK = 16
 };
 
 /* Changed entry information.  */
diff --git a/fs/nfsd/nfs4xdr_gen.c b/fs/nfsd/nfs4xdr_gen.c
index 3a9c82418223..61346d9e6833 100644
--- a/fs/nfsd/nfs4xdr_gen.c
+++ b/fs/nfsd/nfs4xdr_gen.c
@@ -589,6 +589,17 @@ xdrgen_decode_notify_type4(struct xdr_stream *xdr, notify_type4 *ptr)
 	case NOTIFY4_ADD_ENTRY:
 	case NOTIFY4_RENAME_ENTRY:
 	case NOTIFY4_CHANGE_COOKIE_VERIFIER:
+	case NOTIFY4_GFLAG_EXTEND:
+	case NOTIFY4_AUFLAG_VALID:
+	case NOTIFY4_AUFLAG_USER:
+	case NOTIFY4_AUFLAG_GROUP:
+	case NOTIFY4_AUFLAG_OTHER:
+	case NOTIFY4_CHANGE_AUTH:
+	case NOTIFY4_CFLAG_ORDER:
+	case NOTIFY4_AUFLAG_GANOW:
+	case NOTIFY4_AUFLAG_GALATER:
+	case NOTIFY4_CHANGE_GA:
+	case NOTIFY4_CHANGE_AMASK:
 		break;
 	default:
 		return false;
diff --git a/include/linux/sunrpc/xdrgen/nfs4_1.h b/include/linux/sunrpc/xdrgen/nfs4_1.h
index bce993132bc0..356c3da9f4e0 100644
--- a/include/linux/sunrpc/xdrgen/nfs4_1.h
+++ b/include/linux/sunrpc/xdrgen/nfs4_1.h
@@ -376,6 +376,17 @@ enum notify_type4 {
 	NOTIFY4_ADD_ENTRY = 3,
 	NOTIFY4_RENAME_ENTRY = 4,
 	NOTIFY4_CHANGE_COOKIE_VERIFIER = 5,
+	NOTIFY4_GFLAG_EXTEND = 6,
+	NOTIFY4_AUFLAG_VALID = 7,
+	NOTIFY4_AUFLAG_USER = 8,
+	NOTIFY4_AUFLAG_GROUP = 9,
+	NOTIFY4_AUFLAG_OTHER = 10,
+	NOTIFY4_CHANGE_AUTH = 11,
+	NOTIFY4_CFLAG_ORDER = 12,
+	NOTIFY4_AUFLAG_GANOW = 13,
+	NOTIFY4_AUFLAG_GALATER = 14,
+	NOTIFY4_CHANGE_GA = 15,
+	NOTIFY4_CHANGE_AMASK = 16,
 };
 
 typedef enum notify_type4 notify_type4;

-- 
2.54.0