mirror of https://gitee.com/openkylin/linux.git
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/*
|
|
* 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 "sysv.h"
|
|
|
|
/*
|
|
* We have mostly NULLs here: the current defaults are OK for
|
|
* the coh filesystem.
|
|
*/
|
|
const struct file_operations sysv_file_operations = {
|
|
.llseek = generic_file_llseek,
|
|
.read = do_sync_read,
|
|
.aio_read = generic_file_aio_read,
|
|
.write = do_sync_write,
|
|
.aio_write = generic_file_aio_write,
|
|
.mmap = generic_file_mmap,
|
|
.fsync = sysv_sync_file,
|
|
.splice_read = generic_file_splice_read,
|
|
};
|
|
|
|
const struct inode_operations sysv_file_inode_operations = {
|
|
.truncate = sysv_truncate,
|
|
.getattr = sysv_getattr,
|
|
};
|
|
|
|
int sysv_sync_file(struct file * file, struct dentry *dentry, int datasync)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
int err;
|
|
|
|
err = sync_mapping_buffers(inode->i_mapping);
|
|
if (!(inode->i_state & I_DIRTY))
|
|
return err;
|
|
if (datasync && !(inode->i_state & I_DIRTY_DATASYNC))
|
|
return err;
|
|
|
|
err |= sysv_sync_inode(inode);
|
|
return err ? -EIO : 0;
|
|
}
|