/* *  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 * *  64-bit file support on 64-bit platforms by Jakub Jelinek * 	(jj@sunsite.ms.mff.cuni.cz) */ #include <linux/time.h>#include <linux/pagemap.h>#include <linux/quotaops.h>#include "ext2.h"#include "xattr.h"#include "acl.h" /* * Called when filp is released. This happens when all file descriptors * for a single struct file are closed. Note that different open() calls * for the same file yield different struct file structures. */static int ext2_release_file (struct inode * inode, struct file * filp){	if (filp->f_mode & FMODE_WRITE) {		mutex_lock(&EXT2_I(inode)->truncate_mutex);		ext2_discard_reservation(inode);		mutex_unlock(&EXT2_I(inode)->truncate_mutex);	}	return 0;} int ext2_fsync(struct file *file, loff_t start, loff_t end, int datasync){	int ret;	struct super_block *sb = file->f_mapping->host->i_sb;	struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping; 	ret = generic_file_fsync(file, start, end, datasync);	if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) {		/* We don't really know where the IO error happened... */		ext2_error(sb, __func__,			   "detected IO error when writing metadata buffers");		ret = -EIO;	}	return ret;} /* * We have mostly NULL's here: the current defaults are ok for * the ext2 filesystem. */const struct file_operations ext2_file_operations = {	.llseek		= generic_file_llseek,	.read		= do_sync_read,	.write		= do_sync_write,	.aio_read	= generic_file_aio_read,	.aio_write	= generic_file_aio_write,	.unlocked_ioctl = ext2_ioctl,#ifdef CONFIG_COMPAT	.compat_ioctl	= ext2_compat_ioctl,#endif	.mmap		= generic_file_mmap,	.open		= dquot_file_open,	.release	= ext2_release_file,	.fsync		= ext2_fsync,	.splice_read	= generic_file_splice_read,	.splice_write	= generic_file_splice_write,}; #ifdef CONFIG_EXT2_FS_XIPconst struct file_operations ext2_xip_file_operations = {	.llseek		= generic_file_llseek,	.read		= xip_file_read,	.write		= xip_file_write,	.unlocked_ioctl = ext2_ioctl,#ifdef CONFIG_COMPAT	.compat_ioctl	= ext2_compat_ioctl,#endif	.mmap		= xip_file_mmap,	.open		= dquot_file_open,	.release	= ext2_release_file,	.fsync		= ext2_fsync,};#endif const struct inode_operations ext2_file_inode_operations = {#ifdef CONFIG_EXT2_FS_XATTR	.setxattr	= generic_setxattr,	.getxattr	= generic_getxattr,	.listxattr	= ext2_listxattr,	.removexattr	= generic_removexattr,#endif	.setattr	= ext2_setattr,	.get_acl	= ext2_get_acl,	.fiemap		= ext2_fiemap,};