Root/fs/ext3/file.c

1/*
2 * linux/fs/ext3/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 * ext3 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/fs.h>
23#include <linux/jbd.h>
24#include <linux/quotaops.h>
25#include <linux/ext3_fs.h>
26#include <linux/ext3_jbd.h>
27#include "xattr.h"
28#include "acl.h"
29
30/*
31 * Called when an inode is released. Note that this is different
32 * from ext3_file_open: open gets called at every open, but release
33 * gets called only when /all/ the files are closed.
34 */
35static int ext3_release_file (struct inode * inode, struct file * filp)
36{
37    if (ext3_test_inode_state(inode, EXT3_STATE_FLUSH_ON_CLOSE)) {
38        filemap_flush(inode->i_mapping);
39        ext3_clear_inode_state(inode, EXT3_STATE_FLUSH_ON_CLOSE);
40    }
41    /* if we are the last writer on the inode, drop the block reservation */
42    if ((filp->f_mode & FMODE_WRITE) &&
43            (atomic_read(&inode->i_writecount) == 1))
44    {
45        mutex_lock(&EXT3_I(inode)->truncate_mutex);
46        ext3_discard_reservation(inode);
47        mutex_unlock(&EXT3_I(inode)->truncate_mutex);
48    }
49    if (is_dx(inode) && filp->private_data)
50        ext3_htree_free_dir_info(filp->private_data);
51
52    return 0;
53}
54
55const struct file_operations ext3_file_operations = {
56    .llseek = generic_file_llseek,
57    .read = do_sync_read,
58    .write = do_sync_write,
59    .aio_read = generic_file_aio_read,
60    .aio_write = generic_file_aio_write,
61    .unlocked_ioctl = ext3_ioctl,
62#ifdef CONFIG_COMPAT
63    .compat_ioctl = ext3_compat_ioctl,
64#endif
65    .mmap = generic_file_mmap,
66    .open = dquot_file_open,
67    .release = ext3_release_file,
68    .fsync = ext3_sync_file,
69    .splice_read = generic_file_splice_read,
70    .splice_write = generic_file_splice_write,
71};
72
73const struct inode_operations ext3_file_inode_operations = {
74    .truncate = ext3_truncate,
75    .setattr = ext3_setattr,
76#ifdef CONFIG_EXT3_FS_XATTR
77    .setxattr = generic_setxattr,
78    .getxattr = generic_getxattr,
79    .listxattr = ext3_listxattr,
80    .removexattr = generic_removexattr,
81#endif
82    .check_acl = ext3_check_acl,
83    .fiemap = ext3_fiemap,
84};
85
86

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