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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Dave Kleikamp1868f4a2005-05-04 15:29:35 -05002 * Copyright (C) International Business Machines Corp., 2000-2002
3 * Portions Copyright (C) Christoph Hellwig, 2001-2002
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
Dave Kleikamp63f83c92006-10-02 09:55:27 -05007 * the Free Software Foundation; either version 2 of the License, or
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * (at your option) any later version.
Dave Kleikamp63f83c92006-10-02 09:55:27 -05009 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
13 * the GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
Dave Kleikamp63f83c92006-10-02 09:55:27 -050016 * along with this program; if not, write to the Free Software
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20#include <linux/fs.h>
21#include "jfs_incore.h"
Dave Kleikamp1868f4a2005-05-04 15:29:35 -050022#include "jfs_inode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include "jfs_dmap.h"
24#include "jfs_txnmgr.h"
25#include "jfs_xattr.h"
26#include "jfs_acl.h"
27#include "jfs_debug.h"
28
Linus Torvalds1da177e2005-04-16 15:20:36 -070029int jfs_fsync(struct file *file, struct dentry *dentry, int datasync)
30{
31 struct inode *inode = dentry->d_inode;
32 int rc = 0;
33
34 if (!(inode->i_state & I_DIRTY) ||
35 (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
36 /* Make sure committed changes hit the disk */
37 jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
38 return rc;
39 }
40
41 rc |= jfs_commit_inode(inode, 1);
42
43 return rc ? -EIO : 0;
44}
45
46static int jfs_open(struct inode *inode, struct file *file)
47{
48 int rc;
49
50 if ((rc = generic_file_open(inode, file)))
51 return rc;
52
53 /*
54 * We attempt to allow only one "active" file open per aggregate
55 * group. Otherwise, appending to files in parallel can cause
56 * fragmentation within the files.
57 *
58 * If the file is empty, it was probably just created and going
59 * to be written to. If it has a size, we'll hold off until the
60 * file is actually grown.
61 */
62 if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
63 (inode->i_size == 0)) {
64 struct jfs_inode_info *ji = JFS_IP(inode);
65 spin_lock_irq(&ji->ag_lock);
66 if (ji->active_ag == -1) {
67 ji->active_ag = ji->agno;
68 atomic_inc(
69 &JFS_SBI(inode->i_sb)->bmap->db_active[ji->agno]);
70 }
71 spin_unlock_irq(&ji->ag_lock);
72 }
73
74 return 0;
75}
76static int jfs_release(struct inode *inode, struct file *file)
77{
78 struct jfs_inode_info *ji = JFS_IP(inode);
79
80 spin_lock_irq(&ji->ag_lock);
81 if (ji->active_ag != -1) {
82 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
83 atomic_dec(&bmap->db_active[ji->active_ag]);
84 ji->active_ag = -1;
85 }
86 spin_unlock_irq(&ji->ag_lock);
87
88 return 0;
89}
90
91struct inode_operations jfs_file_inode_operations = {
92 .truncate = jfs_truncate,
93 .setxattr = jfs_setxattr,
94 .getxattr = jfs_getxattr,
95 .listxattr = jfs_listxattr,
96 .removexattr = jfs_removexattr,
97#ifdef CONFIG_JFS_POSIX_ACL
98 .setattr = jfs_setattr,
99 .permission = jfs_permission,
100#endif
101};
102
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800103const struct file_operations jfs_file_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 .open = jfs_open,
105 .llseek = generic_file_llseek,
Badari Pulavarty543ade12006-09-30 23:28:48 -0700106 .write = do_sync_write,
107 .read = do_sync_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 .aio_read = generic_file_aio_read,
109 .aio_write = generic_file_aio_write,
110 .mmap = generic_file_mmap,
Dave Kleikamp63f83c92006-10-02 09:55:27 -0500111 .sendfile = generic_file_sendfile,
Daniel Drake89f68222006-10-30 11:47:02 -0600112 .splice_read = generic_file_splice_read,
113 .splice_write = generic_file_splice_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 .fsync = jfs_fsync,
115 .release = jfs_release,
Herbert Poetzlfa3241d2006-02-09 09:09:16 -0600116 .ioctl = jfs_ioctl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117};