NFSv4: Clear NFS_CAP_OPEN_XOR and NFS_CAP_DELEGTIME if not supported

JIRA: https://issues.redhat.com/browse/RHEL-108616

commit b3ac334
Author: Trond Myklebust <trond.myklebust@hammerspace.com>
Date:   Fri Aug 29 09:12:30 2025 -0700

    NFSv4: Clear NFS_CAP_OPEN_XOR and NFS_CAP_DELEGTIME if not supported

    _nfs4_server_capabilities() should clear capabilities that are not
    supported by the server.

    Fixes: d2a00cc ("NFSv4: Detect support for OPEN4_SHARE_ACCESS_WANT_OPEN_XOR_DELEGATION")
    Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

Signed-off-by: Benjamin Coddington <bcodding@redhat.com>

Author: bcodding-rh

fs/nfs/nfs4proc.c

@@ -3985,7 +3985,8 @@ static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *f
 		memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
 		server->caps &=
 			~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS | NFS_CAP_SYMLINKS |
-			  NFS_CAP_SECURITY_LABEL | NFS_CAP_FS_LOCATIONS);
+			  NFS_CAP_SECURITY_LABEL | NFS_CAP_FS_LOCATIONS |
+			  NFS_CAP_OPEN_XOR | NFS_CAP_DELEGTIME);
 		server->fattr_valid = NFS_ATTR_FATTR_V4;
 		if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
 				res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)