1/*
2 *  linux/fs/ext2/file.c
3 *
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
8 *
9 *  from
10 *
11 *  linux/fs/minix/file.c
12 *
13 *  Copyright (C) 1991, 1992  Linus Torvalds
14 *
15 *  ext2 fs regular file handling primitives
16 *
17 *  64-bit file support on 64-bit platforms by Jakub Jelinek
18 * 	(jj@sunsite.ms.mff.cuni.cz)
19 */
20
21#include <linux/time.h>
22#include <linux/pagemap.h>
23#include <linux/quotaops.h>
24#include "ext2.h"
25#include "xattr.h"
26#include "acl.h"
27
28/*
29 * Called when filp is released. This happens when all file descriptors
30 * for a single struct file are closed. Note that different open() calls
31 * for the same file yield different struct file structures.
32 */
33static int ext2_release_file (struct inode * inode, struct file * filp)
34{
35	if (filp->f_mode & FMODE_WRITE) {
36		mutex_lock(&EXT2_I(inode)->truncate_mutex);
37		ext2_discard_reservation(inode);
38		mutex_unlock(&EXT2_I(inode)->truncate_mutex);
39	}
40	return 0;
41}
42
43int ext2_fsync(struct file *file, int datasync)
44{
45	int ret;
46	struct super_block *sb = file->f_mapping->host->i_sb;
47	struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
48
49	ret = generic_file_fsync(file, datasync);
50	if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) {
51		/* We don't really know where the IO error happened... */
52		ext2_error(sb, __func__,
53			   "detected IO error when writing metadata buffers");
54		ret = -EIO;
55	}
56	return ret;
57}
58
59/*
60 * We have mostly NULL's here: the current defaults are ok for
61 * the ext2 filesystem.
62 */
63const struct file_operations ext2_file_operations = {
64	.llseek		= generic_file_llseek,
65	.read		= do_sync_read,
66	.write		= do_sync_write,
67	.aio_read	= generic_file_aio_read,
68	.aio_write	= generic_file_aio_write,
69	.unlocked_ioctl = ext2_ioctl,
70#ifdef CONFIG_COMPAT
71	.compat_ioctl	= ext2_compat_ioctl,
72#endif
73	.mmap		= generic_file_mmap,
74	.open		= dquot_file_open,
75	.release	= ext2_release_file,
76	.fsync		= ext2_fsync,
77	.splice_read	= generic_file_splice_read,
78	.splice_write	= generic_file_splice_write,
79};
80
81#ifdef CONFIG_EXT2_FS_XIP
82const struct file_operations ext2_xip_file_operations = {
83	.llseek		= generic_file_llseek,
84	.read		= xip_file_read,
85	.write		= xip_file_write,
86	.unlocked_ioctl = ext2_ioctl,
87#ifdef CONFIG_COMPAT
88	.compat_ioctl	= ext2_compat_ioctl,
89#endif
90	.mmap		= xip_file_mmap,
91	.open		= dquot_file_open,
92	.release	= ext2_release_file,
93	.fsync		= ext2_fsync,
94};
95#endif
96
97const struct inode_operations ext2_file_inode_operations = {
98#ifdef CONFIG_EXT2_FS_XATTR
99	.setxattr	= generic_setxattr,
100	.getxattr	= generic_getxattr,
101	.listxattr	= ext2_listxattr,
102	.removexattr	= generic_removexattr,
103#endif
104	.setattr	= ext2_setattr,
105	.check_acl	= ext2_check_acl,
106	.fiemap		= ext2_fiemap,
107};
108