linux/fs/orangefs/file.c

// SPDX-License-Identifier: GPL-2.0
/*
 * (C) 2001 Clemson University and The University of Chicago
 * Copyright 2018 Omnibond Systems, L.L.C.
 *
 * See COPYING in top-level directory.
 */

/*
 *  Linux VFS file operations.
 */

#include "protocol.h"
#include "orangefs-kernel.h"
#include "orangefs-bufmap.h"
#include <linux/fs.h>
#include <linux/filelock.h>
#include <linux/pagemap.h>

static int flush_racache(struct inode *inode)
{ … }

/*
 * Post and wait for the I/O upcall to finish
 */
ssize_t wait_for_direct_io(enum ORANGEFS_io_type type, struct inode *inode,
	loff_t *offset, struct iov_iter *iter, size_t total_size,
	loff_t readahead_size, struct orangefs_write_range *wr,
	int *index_return, struct file *file)
{ … }

int orangefs_revalidate_mapping(struct inode *inode)
{ … }

static ssize_t orangefs_file_read_iter(struct kiocb *iocb,
    struct iov_iter *iter)
{ … }

static ssize_t orangefs_file_splice_read(struct file *in, loff_t *ppos,
					 struct pipe_inode_info *pipe,
					 size_t len, unsigned int flags)
{ … }

static ssize_t orangefs_file_write_iter(struct kiocb *iocb,
    struct iov_iter *iter)
{ … }

static vm_fault_t orangefs_fault(struct vm_fault *vmf)
{ … }

static const struct vm_operations_struct orangefs_file_vm_ops = …;

/*
 * Memory map a region of a file.
 */
static int orangefs_file_mmap(struct file *file, struct vm_area_struct *vma)
{ … }

#define mapping_nrpages(idata) …

/*
 * Called to notify the module that there are no more references to
 * this file (i.e. no processes have it open).
 *
 * \note Not called when each file is closed.
 */
static int orangefs_file_release(struct inode *inode, struct file *file)
{ … }

/*
 * Push all data for a specific file onto permanent storage.
 */
static int orangefs_fsync(struct file *file,
		       loff_t start,
		       loff_t end,
		       int datasync)
{ … }

/*
 * Change the file pointer position for an instance of an open file.
 *
 * \note If .llseek is overriden, we must acquire lock as described in
 *       Documentation/filesystems/locking.rst.
 *
 * Future upgrade could support SEEK_DATA and SEEK_HOLE but would
 * require much changes to the FS
 */
static loff_t orangefs_file_llseek(struct file *file, loff_t offset, int origin)
{ … }

/*
 * Support local locks (locks that only this kernel knows about)
 * if Orangefs was mounted -o local_lock.
 */
static int orangefs_lock(struct file *filp, int cmd, struct file_lock *fl)
{ … }

static int orangefs_flush(struct file *file, fl_owner_t id)
{ … }

/** ORANGEFS implementation of VFS file operations */
const struct file_operations orangefs_file_operations = …;