NFSv4.1: new flag for state renewal check

Data servers not sharing a session with the mount MDS always have an empty
cl_superblocks list.
Replace the cl_superblocks empty list check to see if it is time to shut down
renewd with the NFS_CS_STOP_RENEW bit which is not set by such a data server.

Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index 3e112de12d8d..0bac4176e505 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -30,6 +30,7 @@ struct nfs_client {
 #define NFS_CS_CALLBACK         1               /* - callback started */
 #define NFS_CS_IDMAP            2               /* - idmap started */
 #define NFS_CS_RENEWD           3               /* - renewd started */
+#define NFS_CS_STOP_RENEW       4               /* no more state to renew */
         struct sockaddr_storage cl_addr;        /* server identifier */
         size_t                  cl_addrlen;
         char *                  cl_hostname;    /* hostname of server */