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>
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index c394662..248a554 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -213,17 +213,14 @@
/*
* 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 @@
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 @@
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 @@
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 @@
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 @@
}
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;