Line data Source code
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 "ext2.h"
24 : #include "xattr.h"
25 : #include "acl.h"
26 :
27 : /*
28 : * Called when filp is released. This happens when all file descriptors
29 : * for a single struct file are closed. Note that different open() calls
30 : * for the same file yield different struct file structures.
31 : */
32 : static int ext2_release_file (struct inode * inode, struct file * filp)
33 : {
34 3 : if (filp->f_mode & FMODE_WRITE) {
35 4 : mutex_lock(&EXT2_I(inode)->truncate_mutex);
36 4 : ext2_discard_reservation(inode);
37 3 : mutex_unlock(&EXT2_I(inode)->truncate_mutex);
38 : }
39 2 : return 0;
40 : }
41 :
42 : int ext2_fsync(struct file *file, struct dentry *dentry, int datasync)
43 : {
44 2 : int ret;
45 4 : struct super_block *sb = dentry->d_inode->i_sb;
46 4 : struct address_space *mapping = sb->s_bdev->bd_inode->i_mapping;
47 2 :
48 2 : ret = simple_fsync(file, dentry, datasync);
49 12 : if (ret == -EIO || test_and_clear_bit(AS_EIO, &mapping->flags)) {
50 : /* We don't really know where the IO error happened... */
51 12 : ext2_error(sb, __func__,
52 : "detected IO error when writing metadata buffers");
53 4 : ret = -EIO;
54 : }
55 6 : return ret;
56 : }
57 :
58 : /*
59 : * We have mostly NULL's here: the current defaults are ok for
60 : * the ext2 filesystem.
61 : */
62 1 : const struct file_operations ext2_file_operations = {
63 : .llseek = generic_file_llseek,
64 : .read = do_sync_read,
65 : .write = do_sync_write,
66 : .aio_read = generic_file_aio_read,
67 : .aio_write = generic_file_aio_write,
68 : .unlocked_ioctl = ext2_ioctl,
69 : #ifdef CONFIG_COMPAT
70 : .compat_ioctl = ext2_compat_ioctl,
71 : #endif
72 : .mmap = generic_file_mmap,
73 : .open = generic_file_open,
74 : .release = ext2_release_file,
75 : .fsync = ext2_fsync,
76 : .splice_read = generic_file_splice_read,
77 : .splice_write = generic_file_splice_write,
78 : };
79 :
80 : #ifdef CONFIG_EXT2_FS_XIP
81 : const struct file_operations ext2_xip_file_operations = {
82 : .llseek = generic_file_llseek,
83 : .read = xip_file_read,
84 : .write = xip_file_write,
85 : .unlocked_ioctl = ext2_ioctl,
86 : #ifdef CONFIG_COMPAT
87 : .compat_ioctl = ext2_compat_ioctl,
88 : #endif
89 : .mmap = xip_file_mmap,
90 : .open = generic_file_open,
91 : .release = ext2_release_file,
92 : .fsync = ext2_fsync,
93 : };
94 : #endif
95 :
96 1 : const struct inode_operations ext2_file_inode_operations = {
97 : .truncate = ext2_truncate,
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 : };
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