NFS: Clean up nfs_read_rpcsetup and nfs_write_rpcsetup

Split them up into two parts: one which sets up the struct nfs_read/write_data,
the other which sets up the actual RPC call or pNFS call.

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

1 files changed, 25 insertions, 17 deletions

diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index c394662c790e..248a55425853 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -213,17 +213,14 @@ EXPORT_SYMBOL_GPL(nfs_initiate_read);
 /*
  * Set up the NFS read request struct
  */
-static int nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
-                const struct rpc_call_ops *call_ops,
-                unsigned int count, unsigned int offset,
-                struct pnfs_layout_segment *lseg)
+static void nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
+                unsigned int count, unsigned int offset)
 {
         struct inode *inode = req->wb_context->path.dentry->d_inode;
 
         data->req         = req;
         data->inode       = inode;
         data->cred        = req->wb_context->cred;
-        data->lseg        = get_lseg(lseg);
 
         data->args.fh     = NFS_FH(inode);
         data->args.offset = req_offset(req) + offset;
@@ -237,10 +234,21 @@ static int nfs_read_rpcsetup(struct nfs_page *req, struct nfs_read_data *data,
         data->res.count   = count;
         data->res.eof     = 0;
         nfs_fattr_init(&data->fattr);
+}
 
-        if (data->lseg &&
-            (pnfs_try_to_read_data(data, call_ops) == PNFS_ATTEMPTED))
-                return 0;
+static int nfs_do_read(struct nfs_read_data *data,
+                const struct rpc_call_ops *call_ops,
+                struct pnfs_layout_segment *lseg)
+{
+        struct inode *inode = data->args.context->path.dentry->d_inode;
+
+        if (lseg) {
+                data->lseg = get_lseg(lseg);
+                if (pnfs_try_to_read_data(data, call_ops) == PNFS_ATTEMPTED)
+                        return 0;
+                put_lseg(data->lseg);
+                data->lseg = NULL;
+        }
 
         return nfs_initiate_read(data, NFS_CLIENT(inode), call_ops);
 }
@@ -292,7 +300,7 @@ static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc)
                 data = nfs_readdata_alloc(1);
                 if (!data)
                         goto out_bad;
-                list_add(&data->pages, &list);
+                list_add(&data->list, &list);
                 requests++;
                 nbytes -= len;
         } while(nbytes != 0);
@@ -304,15 +312,15 @@ static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc)
         do {
                 int ret2;
 
-                data = list_entry(list.next, struct nfs_read_data, pages);
-                list_del_init(&data->pages);
+                data = list_entry(list.next, struct nfs_read_data, list);
+                list_del_init(&data->list);
 
                 data->pagevec[0] = page;
 
                 if (nbytes < rsize)
                         rsize = nbytes;
-                ret2 = nfs_read_rpcsetup(req, data, &nfs_read_partial_ops,
-                                         rsize, offset, lseg);
+                nfs_read_rpcsetup(req, data, rsize, offset);
+                ret2 = nfs_do_read(data, &nfs_read_partial_ops, lseg);
                 if (ret == 0)
                         ret = ret2;
                 offset += rsize;
@@ -325,8 +333,8 @@ static int nfs_pagein_multi(struct nfs_pageio_descriptor *desc)
 
 out_bad:
         while (!list_empty(&list)) {
-                data = list_entry(list.next, struct nfs_read_data, pages);
-                list_del(&data->pages);
+                data = list_entry(list.next, struct nfs_read_data, list);
+                list_del(&data->list);
                 nfs_readdata_free(data);
         }
         SetPageError(page);
@@ -362,8 +370,8 @@ static int nfs_pagein_one(struct nfs_pageio_descriptor *desc)
         }
         req = nfs_list_entry(data->pages.next);
 
-        ret = nfs_read_rpcsetup(req, data, &nfs_read_full_ops, desc->pg_count,
-                                0, lseg);
+        nfs_read_rpcsetup(req, data, desc->pg_count, 0);
+        ret = nfs_do_read(data, &nfs_read_full_ops, lseg);
 out:
         put_lseg(lseg);
         desc->pg_lseg = NULL;