NFS: Cleanup of NFS read code

Same callback hierarchy inversion as for the NFS write calls. This patch is
not strictly speaking needed by the O_DIRECT code, but avoids confusing
differences between the asynchronous read and write code.

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

1 files changed, 6 insertions, 21 deletions

diff --git a/fs/nfs/nfs3proc.c b/fs/nfs/nfs3proc.c
index c4f7de8830e9..cf186f0d2b3b 100644
--- a/fs/nfs/nfs3proc.c
+++ b/fs/nfs/nfs3proc.c
@@ -811,29 +811,18 @@ nfs3_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 
 extern u32 *nfs3_decode_dirent(u32 *, struct nfs_entry *, int);
 
-static void nfs3_read_done(struct rpc_task *task, void *calldata)
+static int nfs3_read_done(struct rpc_task *task, struct nfs_read_data *data)
 {
-        struct nfs_read_data *data = calldata;
-
         if (nfs3_async_handle_jukebox(task, data->inode))
-                return;
+                return -EAGAIN;
         /* Call back common NFS readpage processing */
         if (task->tk_status >= 0)
                 nfs_refresh_inode(data->inode, &data->fattr);
-        nfs_readpage_result(task, calldata);
+        return 0;
 }
 
-static const struct rpc_call_ops nfs3_read_ops = {
-        .rpc_call_done = nfs3_read_done,
-        .rpc_release = nfs_readdata_release,
-};
-
-static void
-nfs3_proc_read_setup(struct nfs_read_data *data)
+static void nfs3_proc_read_setup(struct nfs_read_data *data)
 {
-        struct rpc_task         *task = &data->task;
-        struct inode            *inode = data->inode;
-        int                     flags;
         struct rpc_message      msg = {
                 .rpc_proc       = &nfs3_procedures[NFS3PROC_READ],
                 .rpc_argp       = &data->args,
@@ -841,12 +830,7 @@ nfs3_proc_read_setup(struct nfs_read_data *data)
                 .rpc_cred       = data->cred,
         };
 
-        /* N.B. Do we need to test? Never called for swapfile inode */
-        flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
-
-        /* Finalize the task. */
-        rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs3_read_ops, data);
-        rpc_call_setup(task, &msg, 0);
+        rpc_call_setup(&data->task, &msg, 0);
 }
 
 static int nfs3_write_done(struct rpc_task *task, struct nfs_write_data *data)
@@ -935,6 +919,7 @@ struct nfs_rpc_ops	nfs_v3_clientops = {
         .pathconf       = nfs3_proc_pathconf,
         .decode_dirent  = nfs3_decode_dirent,
         .read_setup     = nfs3_proc_read_setup,
+        .read_done      = nfs3_read_done,
         .write_setup    = nfs3_proc_write_setup,
         .write_done     = nfs3_write_done,
         .commit_setup   = nfs3_proc_commit_setup,