NFS: set layout driver

Put in the infrastructure that uses information returned from the
server at mount to select a layout driver module.

In this patch, a stub is used that always returns "no driver found".

Signed-off-by: Ricardo Labiaga <Ricardo.Labiaga@netapp.com>
Signed-off-by: Dean Hildebrand <dhildebz@umich.edu>
Signed-off-by: Marc Eshel <eshel@almaden.ibm.com>
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index a63bce8d0596..eba0bcc1bab0 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -48,6 +48,7 @@
 #include "iostat.h"
 #include "internal.h"
 #include "fscache.h"
+#include "pnfs.h"
 
 #define NFSDBG_FACILITY         NFSDBG_CLIENT
 
@@ -900,6 +901,8 @@ static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *
         if (server->wsize > NFS_MAX_FILE_IO_SIZE)
                 server->wsize = NFS_MAX_FILE_IO_SIZE;
         server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+        set_pnfs_layoutdriver(server, fsinfo->layouttype);
+
         server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
 
         server->dtsize = nfs_block_size(fsinfo->dtpref, NULL);
@@ -939,6 +942,7 @@ static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, str
         }
 
         fsinfo.fattr = fattr;
+        fsinfo.layouttype = 0;
         error = clp->rpc_ops->fsinfo(server, mntfh, &fsinfo);
         if (error < 0)
                 goto out_error;
@@ -1021,6 +1025,7 @@ void nfs_free_server(struct nfs_server *server)
 {
         dprintk("--> nfs_free_server()\n");
 
+        unset_pnfs_layoutdriver(server);
         spin_lock(&nfs_client_lock);
         list_del(&server->client_link);
         list_del(&server->master_link);