pnfs: add set-clear layoutdriver interface

To allow layout driver to issue getdevicelist at mount time, and clean up
at umount time.

[fixup non NFS_V4_1 set_pnfs_layoutdriver definition]
[pnfs: pass mntfh down the init_pnfs path]
Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Signed-off-by: Benny Halevy <bhalevy@tonian.com>
Signed-off-by: Jim Rees <rees@umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 19ea7d9c75e6..a9b18483cb24 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -904,7 +904,9 @@ error:
 /*
  * Load up the server record from information gained in an fsinfo record
  */
-static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo)
+static void nfs_server_set_fsinfo(struct nfs_server *server,
+                                  struct nfs_fh *mntfh,
+                                  struct nfs_fsinfo *fsinfo)
 {
         unsigned long max_rpc_payload;
 
@@ -934,7 +936,7 @@ 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);
+        set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype);
 
         server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL);
 
@@ -980,7 +982,7 @@ static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, str
         if (error < 0)
                 goto out_error;
 
-        nfs_server_set_fsinfo(server, &fsinfo);
+        nfs_server_set_fsinfo(server, mntfh, &fsinfo);
 
         /* Get some general file system info */
         if (server->namelen == 0) {