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/*
* linux/fs/ufs/file.c
*
* Copyright (C) 1998
* Daniel Pirkl <daniel.pirkl@email.cz>
* Charles University, Faculty of Mathematics and Physics
*
* from
*
* linux/fs/ext2/file.c
*
* Copyright (C) 1992, 1993, 1994, 1995
* Remy Card (card@masi.ibp.fr)
* Laboratoire MASI - Institut Blaise Pascal
* Universite Pierre et Marie Curie (Paris VI)
*
* from
*
* linux/fs/minix/file.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*
* ext2 fs regular file handling primitives
*/
#include <asm/uaccess.h>
#include <asm/system.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/ufs_fs.h>
#include <linux/fcntl.h>
#include <linux/sched.h>
#include <linux/stat.h>
#include <linux/locks.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
/*
* Make sure the offset never goes beyond the 32-bit mark..
*/
static long long ufs_file_lseek(
struct file *file,
long long offset,
int origin )
{
long long retval;
struct inode *inode = file->f_dentry->d_inode;
switch (origin) {
case 2:
offset += inode->i_size;
break;
case 1:
offset += file->f_pos;
}
retval = -EINVAL;
/* make sure the offset fits in 32 bits */
if (((unsigned long long) offset >> 32) == 0) {
if (offset != file->f_pos) {
file->f_pos = offset;
file->f_reada = 0;
file->f_version = ++event;
}
retval = offset;
}
return retval;
}
/*
* We have mostly NULL's here: the current defaults are ok for
* the ufs filesystem.
*/
struct file_operations ufs_file_operations = {
llseek: ufs_file_lseek,
read: generic_file_read,
write: generic_file_write,
mmap: generic_file_mmap,
open: generic_file_open,
};
struct inode_operations ufs_file_inode_operations = {
truncate: ufs_truncate,
};
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