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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
Christoph Hellwig10257742010-06-04 11:30:02 +020020#include <linux/mm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include <linux/fs.h>
Christoph Hellwig759bfee2010-03-03 09:05:02 -050022#include <linux/quotaops.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include "jfs_incore.h"
Dave Kleikamp1868f4a2005-05-04 15:29:35 -050024#include "jfs_inode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "jfs_dmap.h"
26#include "jfs_txnmgr.h"
27#include "jfs_xattr.h"
28#include "jfs_acl.h"
29#include "jfs_debug.h"
30
Josef Bacik02c24a82011-07-16 20:44:56 -040031int jfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
Linus Torvalds1da177e2005-04-16 15:20:36 -070032{
Christoph Hellwig7ea80852010-05-26 17:53:25 +020033 struct inode *inode = file->f_mapping->host;
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 int rc = 0;
35
Josef Bacik02c24a82011-07-16 20:44:56 -040036 rc = filemap_write_and_wait_range(inode->i_mapping, start, end);
37 if (rc)
38 return rc;
39
40 mutex_lock(&inode->i_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070041 if (!(inode->i_state & I_DIRTY) ||
42 (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
43 /* Make sure committed changes hit the disk */
44 jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
Josef Bacik02c24a82011-07-16 20:44:56 -040045 mutex_unlock(&inode->i_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070046 return rc;
47 }
48
49 rc |= jfs_commit_inode(inode, 1);
Josef Bacik02c24a82011-07-16 20:44:56 -040050 mutex_unlock(&inode->i_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
52 return rc ? -EIO : 0;
53}
54
55static int jfs_open(struct inode *inode, struct file *file)
56{
57 int rc;
58
Christoph Hellwig907f4552010-03-03 09:05:06 -050059 if ((rc = dquot_file_open(inode, file)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 return rc;
61
62 /*
63 * We attempt to allow only one "active" file open per aggregate
64 * group. Otherwise, appending to files in parallel can cause
65 * fragmentation within the files.
66 *
67 * If the file is empty, it was probably just created and going
68 * to be written to. If it has a size, we'll hold off until the
69 * file is actually grown.
70 */
71 if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
72 (inode->i_size == 0)) {
73 struct jfs_inode_info *ji = JFS_IP(inode);
74 spin_lock_irq(&ji->ag_lock);
75 if (ji->active_ag == -1) {
Dave Kleikampd31b53e2011-06-20 10:53:46 -050076 struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb);
77 ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb);
78 atomic_inc( &jfs_sb->bmap->db_active[ji->active_ag]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 }
80 spin_unlock_irq(&ji->ag_lock);
81 }
82
83 return 0;
84}
85static int jfs_release(struct inode *inode, struct file *file)
86{
87 struct jfs_inode_info *ji = JFS_IP(inode);
88
89 spin_lock_irq(&ji->ag_lock);
90 if (ji->active_ag != -1) {
91 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
92 atomic_dec(&bmap->db_active[ji->active_ag]);
93 ji->active_ag = -1;
94 }
95 spin_unlock_irq(&ji->ag_lock);
96
97 return 0;
98}
99
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500100int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
101{
102 struct inode *inode = dentry->d_inode;
103 int rc;
104
105 rc = inode_change_ok(inode, iattr);
106 if (rc)
107 return rc;
108
Dmitry Monakhov12755622010-04-08 22:04:20 +0400109 if (is_quota_modification(inode, iattr))
Christoph Hellwig871a2932010-03-03 09:05:07 -0500110 dquot_initialize(inode);
Eric W. Biedermanc18cdc12012-02-10 11:40:34 -0800111 if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) ||
112 (iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) {
Christoph Hellwigb43fa822010-03-03 09:05:03 -0500113 rc = dquot_transfer(inode, iattr);
114 if (rc)
115 return rc;
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500116 }
117
Christoph Hellwig10257742010-06-04 11:30:02 +0200118 if ((iattr->ia_valid & ATTR_SIZE) &&
119 iattr->ia_size != i_size_read(inode)) {
Christoph Hellwig562c72a2011-06-24 14:29:45 -0400120 inode_dio_wait(inode);
121
Marco Stornelli86dd07d2012-12-15 11:54:25 +0100122 rc = inode_newsize_ok(inode, iattr->ia_size);
Christoph Hellwig10257742010-06-04 11:30:02 +0200123 if (rc)
124 return rc;
Marco Stornelli86dd07d2012-12-15 11:54:25 +0100125
126 truncate_setsize(inode, iattr->ia_size);
127 jfs_truncate(inode);
Christoph Hellwig10257742010-06-04 11:30:02 +0200128 }
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500129
Christoph Hellwig10257742010-06-04 11:30:02 +0200130 setattr_copy(inode, iattr);
131 mark_inode_dirty(inode);
132
133 if (iattr->ia_valid & ATTR_MODE)
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500134 rc = jfs_acl_chmod(inode);
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500135 return rc;
136}
137
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -0800138const struct inode_operations jfs_file_inode_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139 .setxattr = jfs_setxattr,
140 .getxattr = jfs_getxattr,
141 .listxattr = jfs_listxattr,
142 .removexattr = jfs_removexattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 .setattr = jfs_setattr,
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500144#ifdef CONFIG_JFS_POSIX_ACL
Christoph Hellwig4e34e712011-07-23 17:37:31 +0200145 .get_acl = jfs_get_acl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146#endif
147};
148
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800149const struct file_operations jfs_file_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 .open = jfs_open,
151 .llseek = generic_file_llseek,
Badari Pulavarty543ade12006-09-30 23:28:48 -0700152 .write = do_sync_write,
153 .read = do_sync_read,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154 .aio_read = generic_file_aio_read,
155 .aio_write = generic_file_aio_write,
156 .mmap = generic_file_mmap,
Daniel Drake89f68222006-10-30 11:47:02 -0600157 .splice_read = generic_file_splice_read,
158 .splice_write = generic_file_splice_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 .fsync = jfs_fsync,
160 .release = jfs_release,
Andi Kleenbaab81f2008-01-27 16:58:51 -0600161 .unlocked_ioctl = jfs_ioctl,
Andi Kleenef1fc2f2008-01-27 17:02:02 -0600162#ifdef CONFIG_COMPAT
163 .compat_ioctl = jfs_compat_ioctl,
164#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165};