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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>
Christoph Hellwig759bfee2010-03-03 09:05:02 -050021#include <linux/quotaops.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include "jfs_incore.h"
Dave Kleikamp1868f4a2005-05-04 15:29:35 -050023#include "jfs_inode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "jfs_dmap.h"
25#include "jfs_txnmgr.h"
26#include "jfs_xattr.h"
27#include "jfs_acl.h"
28#include "jfs_debug.h"
29
Christoph Hellwig7ea80852010-05-26 17:53:25 +020030int jfs_fsync(struct file *file, int datasync)
Linus Torvalds1da177e2005-04-16 15:20:36 -070031{
Christoph Hellwig7ea80852010-05-26 17:53:25 +020032 struct inode *inode = file->f_mapping->host;
Linus Torvalds1da177e2005-04-16 15:20:36 -070033 int rc = 0;
34
35 if (!(inode->i_state & I_DIRTY) ||
36 (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
37 /* Make sure committed changes hit the disk */
38 jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
39 return rc;
40 }
41
42 rc |= jfs_commit_inode(inode, 1);
43
44 return rc ? -EIO : 0;
45}
46
47static int jfs_open(struct inode *inode, struct file *file)
48{
49 int rc;
50
Christoph Hellwig907f4552010-03-03 09:05:06 -050051 if ((rc = dquot_file_open(inode, file)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 return rc;
53
54 /*
55 * We attempt to allow only one "active" file open per aggregate
56 * group. Otherwise, appending to files in parallel can cause
57 * fragmentation within the files.
58 *
59 * If the file is empty, it was probably just created and going
60 * to be written to. If it has a size, we'll hold off until the
61 * file is actually grown.
62 */
63 if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
64 (inode->i_size == 0)) {
65 struct jfs_inode_info *ji = JFS_IP(inode);
66 spin_lock_irq(&ji->ag_lock);
67 if (ji->active_ag == -1) {
68 ji->active_ag = ji->agno;
69 atomic_inc(
70 &JFS_SBI(inode->i_sb)->bmap->db_active[ji->agno]);
71 }
72 spin_unlock_irq(&ji->ag_lock);
73 }
74
75 return 0;
76}
77static int jfs_release(struct inode *inode, struct file *file)
78{
79 struct jfs_inode_info *ji = JFS_IP(inode);
80
81 spin_lock_irq(&ji->ag_lock);
82 if (ji->active_ag != -1) {
83 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
84 atomic_dec(&bmap->db_active[ji->active_ag]);
85 ji->active_ag = -1;
86 }
87 spin_unlock_irq(&ji->ag_lock);
88
89 return 0;
90}
91
Christoph Hellwig759bfee2010-03-03 09:05:02 -050092int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
93{
94 struct inode *inode = dentry->d_inode;
95 int rc;
96
97 rc = inode_change_ok(inode, iattr);
98 if (rc)
99 return rc;
100
Dmitry Monakhov12755622010-04-08 22:04:20 +0400101 if (is_quota_modification(inode, iattr))
Christoph Hellwig871a2932010-03-03 09:05:07 -0500102 dquot_initialize(inode);
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500103 if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) ||
104 (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) {
Christoph Hellwigb43fa822010-03-03 09:05:03 -0500105 rc = dquot_transfer(inode, iattr);
106 if (rc)
107 return rc;
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500108 }
109
110 rc = inode_setattr(inode, iattr);
111
112 if (!rc && (iattr->ia_valid & ATTR_MODE))
113 rc = jfs_acl_chmod(inode);
114
115 return rc;
116}
117
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -0800118const struct inode_operations jfs_file_inode_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 .truncate = jfs_truncate,
120 .setxattr = jfs_setxattr,
121 .getxattr = jfs_getxattr,
122 .listxattr = jfs_listxattr,
123 .removexattr = jfs_removexattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 .setattr = jfs_setattr,
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500125#ifdef CONFIG_JFS_POSIX_ACL
Linus Torvalds18f4c642009-08-28 12:29:03 -0700126 .check_acl = jfs_check_acl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127#endif
128};
129
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800130const struct file_operations jfs_file_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 .open = jfs_open,
132 .llseek = generic_file_llseek,
Badari Pulavarty543ade12006-09-30 23:28:48 -0700133 .write = do_sync_write,
134 .read = do_sync_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 .aio_read = generic_file_aio_read,
136 .aio_write = generic_file_aio_write,
137 .mmap = generic_file_mmap,
Daniel Drake89f68222006-10-30 11:47:02 -0600138 .splice_read = generic_file_splice_read,
139 .splice_write = generic_file_splice_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 .fsync = jfs_fsync,
141 .release = jfs_release,
Andi Kleenbaab81f2008-01-27 16:58:51 -0600142 .unlocked_ioctl = jfs_ioctl,
Andi Kleenef1fc2f2008-01-27 17:02:02 -0600143#ifdef CONFIG_COMPAT
144 .compat_ioctl = jfs_compat_ioctl,
145#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146};