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/*
* linux/fs/sysv/file.c
*
* minix/file.c
* Copyright (C) 1991, 1992 Linus Torvalds
*
* coh/file.c
* Copyright (C) 1993 Pascal Haible, Bruno Haible
*
* sysv/file.c
* Copyright (C) 1993 Bruno Haible
*
* SystemV/Coherent regular file handling primitives
*/
#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/sysv_fs.h>
#include <linux/errno.h>
#include <linux/fcntl.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/locks.h>
#include <linux/pagemap.h>
#include <asm/uaccess.h>
#define NBUF 32
#define MIN(a,b) (((a)<(b))?(a):(b))
#define MAX(a,b) (((a)>(b))?(a):(b))
/*
* Write to a file (through the page cache).
*/
static ssize_t
sysv_file_write(struct file *file, const char *buf, size_t count, loff_t *ppos)
{
return generic_file_write(file, buf, count,
ppos, block_write_partial_page);
}
/*
* We have mostly NULLs here: the current defaults are OK for
* the coh filesystem.
*/
static struct file_operations sysv_file_operations = {
NULL, /* lseek - default */
generic_file_read, /* read */
sysv_file_write, /* write */
NULL, /* readdir - bad */
NULL, /* poll - default */
NULL, /* ioctl - default */
generic_file_mmap, /* mmap */
NULL, /* no special open is needed */
NULL, /* flush */
NULL, /* release */
sysv_sync_file, /* fsync */
NULL, /* fasync */
NULL, /* check_media_change */
NULL /* revalidate */
};
struct inode_operations sysv_file_inode_operations = {
&sysv_file_operations, /* default file operations */
NULL, /* create */
NULL, /* lookup */
NULL, /* link */
NULL, /* unlink */
NULL, /* symlink */
NULL, /* mkdir */
NULL, /* rmdir */
NULL, /* mknod */
NULL, /* rename */
NULL, /* readlink */
NULL, /* follow_link */
sysv_get_block, /* get_block */
block_read_full_page, /* readpage */
block_write_full_page, /* writepage */
sysv_truncate, /* truncate */
NULL, /* permission */
NULL /* revalidate */
};
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