Linux Kernel  3.7.1
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file.c
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1 /*
2  * Copyright (C) 2005, 2006
3  * Avishay Traeger ([email protected])
4  * Copyright (C) 2008, 2009
5  * Boaz Harrosh <[email protected]>
6  *
7  * Copyrights for code taken from ext2:
8  * Copyright (C) 1992, 1993, 1994, 1995
9  * Remy Card ([email protected])
10  * Laboratoire MASI - Institut Blaise Pascal
11  * Universite Pierre et Marie Curie (Paris VI)
12  * from
13  * linux/fs/minix/inode.c
14  * Copyright (C) 1991, 1992 Linus Torvalds
15  *
16  * This file is part of exofs.
17  *
18  * exofs is free software; you can redistribute it and/or modify
19  * it under the terms of the GNU General Public License as published by
20  * the Free Software Foundation. Since it is based on ext2, and the only
21  * valid version of GPL for the Linux kernel is version 2, the only valid
22  * version of GPL for exofs is version 2.
23  *
24  * exofs is distributed in the hope that it will be useful,
25  * but WITHOUT ANY WARRANTY; without even the implied warranty of
26  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27  * GNU General Public License for more details.
28  *
29  * You should have received a copy of the GNU General Public License
30  * along with exofs; if not, write to the Free Software
31  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
32  */
33 #include "exofs.h"
34 
35 static int exofs_release_file(struct inode *inode, struct file *filp)
36 {
37  return 0;
38 }
39 
40 /* exofs_file_fsync - flush the inode to disk
41  *
42  * Note, in exofs all metadata is written as part of inode, regardless.
43  * The writeout is synchronous
44  */
45 static int exofs_file_fsync(struct file *filp, loff_t start, loff_t end,
46  int datasync)
47 {
48  struct inode *inode = filp->f_mapping->host;
49  int ret;
50 
51  ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
52  if (ret)
53  return ret;
54 
55  mutex_lock(&inode->i_mutex);
56  ret = sync_inode_metadata(filp->f_mapping->host, 1);
57  mutex_unlock(&inode->i_mutex);
58  return ret;
59 }
60 
61 static int exofs_flush(struct file *file, fl_owner_t id)
62 {
63  int ret = vfs_fsync(file, 0);
64  /* TODO: Flush the OSD target */
65  return ret;
66 }
67 
69  .llseek = generic_file_llseek,
70  .read = do_sync_read,
71  .write = do_sync_write,
72  .aio_read = generic_file_aio_read,
73  .aio_write = generic_file_aio_write,
74  .mmap = generic_file_mmap,
75  .open = generic_file_open,
76  .release = exofs_release_file,
77  .fsync = exofs_file_fsync,
78  .flush = exofs_flush,
79  .splice_read = generic_file_splice_read,
80  .splice_write = generic_file_splice_write,
81 };
82 
84  .setattr = exofs_setattr,
85 };