blob: 5d198d0697fbe969d4a5c268374c8d15874ad97e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Jan Kara48bde862009-12-15 16:46:49 -080022#include <linux/pagemap.h>
Christoph Hellwig871a2932010-03-03 09:05:07 -050023#include <linux/quotaops.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "ext2.h"
25#include "xattr.h"
26#include "acl.h"
27
28/*
Jan Karaa6739af2007-07-15 23:40:22 -070029 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 */
33static int ext2_release_file (struct inode * inode, struct file * filp)
34{
Martin J. Bligha686cd82007-10-16 23:30:46 -070035 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 }
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 return 0;
41}
42
Jan Kara48bde862009-12-15 16:46:49 -080043int ext2_fsync(struct file *file, struct dentry *dentry, int datasync)
44{
45 int ret;
46 struct super_block *sb = dentry->d_inode->i_sb;
47 struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
48
49 ret = simple_fsync(file, dentry, 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070059/*
60 * We have mostly NULL's here: the current defaults are ok for
61 * the ext2 filesystem.
62 */
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -080063const struct file_operations ext2_file_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 .llseek = generic_file_llseek,
Badari Pulavarty543ade12006-09-30 23:28:48 -070065 .read = do_sync_read,
66 .write = do_sync_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 .aio_read = generic_file_aio_read,
68 .aio_write = generic_file_aio_write,
Andi Kleen14f9f7b2008-02-06 01:40:10 -080069 .unlocked_ioctl = ext2_ioctl,
David Howellse322ff02006-08-29 19:06:20 +010070#ifdef CONFIG_COMPAT
71 .compat_ioctl = ext2_compat_ioctl,
72#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 .mmap = generic_file_mmap,
Christoph Hellwig907f4552010-03-03 09:05:06 -050074 .open = dquot_file_open,
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 .release = ext2_release_file,
Jan Kara48bde862009-12-15 16:46:49 -080076 .fsync = ext2_fsync,
Jens Axboe5274f052006-03-30 15:15:30 +020077 .splice_read = generic_file_splice_read,
78 .splice_write = generic_file_splice_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -070079};
80
Carsten Otte6d791252005-06-23 22:05:26 -070081#ifdef CONFIG_EXT2_FS_XIP
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -080082const struct file_operations ext2_xip_file_operations = {
Carsten Otte6d791252005-06-23 22:05:26 -070083 .llseek = generic_file_llseek,
Carsten Otteeb6fe0c2005-06-23 22:05:28 -070084 .read = xip_file_read,
85 .write = xip_file_write,
Andi Kleen14f9f7b2008-02-06 01:40:10 -080086 .unlocked_ioctl = ext2_ioctl,
David Howellse322ff02006-08-29 19:06:20 +010087#ifdef CONFIG_COMPAT
88 .compat_ioctl = ext2_compat_ioctl,
89#endif
Carsten Otte6d791252005-06-23 22:05:26 -070090 .mmap = xip_file_mmap,
Christoph Hellwig907f4552010-03-03 09:05:06 -050091 .open = dquot_file_open,
Carsten Otte6d791252005-06-23 22:05:26 -070092 .release = ext2_release_file,
Jan Kara48bde862009-12-15 16:46:49 -080093 .fsync = ext2_fsync,
Carsten Otte6d791252005-06-23 22:05:26 -070094};
95#endif
96
Arjan van de Ven754661f2007-02-12 00:55:38 -080097const struct inode_operations ext2_file_inode_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 .truncate = ext2_truncate,
99#ifdef CONFIG_EXT2_FS_XATTR
100 .setxattr = generic_setxattr,
101 .getxattr = generic_getxattr,
102 .listxattr = ext2_listxattr,
103 .removexattr = generic_removexattr,
104#endif
105 .setattr = ext2_setattr,
Linus Torvalds1d5ccd12009-08-28 12:12:24 -0700106 .check_acl = ext2_check_acl,
Josef Bacik68c9d702008-10-03 17:32:43 -0400107 .fiemap = ext2_fiemap,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108};