inode.c

/*
 *  linux/fs/hfs/inode.c
 *
 * Copyright (C) 1995-1997  Paul H. Hargrove
 * (C) 2003 Ardis Technologies <roman@ardistech.com>
 * This file may be distributed under the terms of the GNU General Public License.
 *
 * This file contains inode-related functions which do not depend on
 * which scheme is being used to represent forks.
 *
 * Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds
 */

#include <linux/pagemap.h>
#include <linux/mpage.h>
#include <linux/sched.h>
#include <linux/uio.h>

#include "hfs_fs.h"
#include "btree.h"

static const struct file_operations hfs_file_operations;
static const struct inode_operations hfs_file_inode_operations;

/*================ Variable-like macros ================*/

#define HFS_VALID_MODE_BITS  (S_IFREG | S_IFDIR | S_IRWXUGO)

static int hfs_writepage(struct page *page, struct writeback_control *wbc)
{
	return block_write_full_page(page, hfs_get_block, wbc);
}

static int hfs_readpage(struct file *file, struct page *page)
{
	return block_read_full_page(page, hfs_get_block);
}

static void hfs_write_failed(struct address_space *mapping, loff_t to)
{
	struct inode *inode = mapping->host;

	if (to > inode->i_size) {
		truncate_pagecache(inode, inode->i_size);
		hfs_file_truncate(inode);
	}
}

static int hfs_write_begin(struct file *file, struct address_space *mapping,
			loff_t pos, unsigned len, unsigned flags,
			struct page **pagep, void **fsdata)
{
	int ret;

	*pagep = NULL;
	ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
				hfs_get_block,
				&HFS_I(mapping->host)->phys_size);
	if (unlikely(ret))
		hfs_write_failed(mapping, pos + len);

	return ret;
}

static sector_t hfs_bmap(struct address_space *mapping, sector_t block)
{
	return generic_block_bmap(mapping, block, hfs_get_block);
}

static int hfs_releasepage(struct page *page, gfp_t mask)