xfs: validate acl count
[linux-2.6.git] / 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  */
35 static 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
55 const 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
73 const struct inode_operations ext3_file_inode_operations = {
74         .setattr        = ext3_setattr,
75 #ifdef CONFIG_EXT3_FS_XATTR
76         .setxattr       = generic_setxattr,
77         .getxattr       = generic_getxattr,
78         .listxattr      = ext3_listxattr,
79         .removexattr    = generic_removexattr,
80 #endif
81         .get_acl        = ext3_get_acl,
82         .fiemap         = ext3_fiemap,
83 };
84