// SPDX-License-Identifier: GPL-2.0-only
/*
* linux/fs/nfs/pagelist.c
*
* A set of helper functions for managing NFS read and write requests.
* The main purpose of these routines is to provide support for the
* coalescing of several requests into a single RPC call.
*
* Copyright 2000, 2001 (c) Trond Myklebust <trond.myklebust@fys.uio.no>
*
*/
#include <linux/slab.h>
#include <linux/file.h>
#include <linux/sched.h>
#include <linux/sunrpc/clnt.h>
#include <linux/nfs.h>
#include <linux/nfs3.h>
#include <linux/nfs4.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_page.h>
#include <linux/nfs_mount.h>
#include <linux/export.h>
#include <linux/filelock.h>
#include "internal.h"
#include "pnfs.h"
#include "nfstrace.h"
#include "fscache.h"
#define NFSDBG_FACILITY NFSDBG_PAGECACHE
static struct kmem_cache *nfs_page_cachep;
static const struct rpc_call_ops nfs_pgio_common_ops;
struct nfs_page_iter_page {
const struct nfs_page *req;
size_t count;
};
static void nfs_page_iter_page_init(struct nfs_page_iter_page *i,
const struct nfs_page *req)
{
i->req = req;
i->count = 0;
}
static void nfs_page_iter_page_advance(struct nfs_page_iter_page *i, size_t sz)
{
const struct nfs_page *req = i->req;
size_t tmp = i->count + 