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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 Hellwig2cc6a5a2013-12-20 05:16:51 -080022#include <linux/posix_acl.h>
Christoph Hellwig759bfee2010-03-03 09:05:02 -050023#include <linux/quotaops.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "jfs_incore.h"
Dave Kleikamp1868f4a2005-05-04 15:29:35 -050025#include "jfs_inode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "jfs_dmap.h"
27#include "jfs_txnmgr.h"
28#include "jfs_xattr.h"
29#include "jfs_acl.h"
30#include "jfs_debug.h"
31
Josef Bacik02c24a82011-07-16 20:44:56 -040032int jfs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
Linus Torvalds1da177e2005-04-16 15:20:36 -070033{
Christoph Hellwig7ea80852010-05-26 17:53:25 +020034 struct inode *inode = file->f_mapping->host;
Linus Torvalds1da177e2005-04-16 15:20:36 -070035 int rc = 0;
36
Josef Bacik02c24a82011-07-16 20:44:56 -040037 rc = filemap_write_and_wait_range(inode->i_mapping, start, end);
38 if (rc)
39 return rc;
40
Al Viro59551022016-01-22 15:40:57 -050041 inode_lock(inode);
Theodore Ts'o0ae45f62015-02-02 00:37:00 -050042 if (!(inode->i_state & I_DIRTY_ALL) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 (datasync && !(inode->i_state & I_DIRTY_DATASYNC))) {
44 /* Make sure committed changes hit the disk */
45 jfs_flush_journal(JFS_SBI(inode->i_sb)->log, 1);
Al Viro59551022016-01-22 15:40:57 -050046 inode_unlock(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 return rc;
48 }
49
50 rc |= jfs_commit_inode(inode, 1);
Al Viro59551022016-01-22 15:40:57 -050051 inode_unlock(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
53 return rc ? -EIO : 0;
54}
55
56static int jfs_open(struct inode *inode, struct file *file)
57{
58 int rc;
59
Christoph Hellwig907f4552010-03-03 09:05:06 -050060 if ((rc = dquot_file_open(inode, file)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 return rc;
62
63 /*
64 * We attempt to allow only one "active" file open per aggregate
65 * group. Otherwise, appending to files in parallel can cause
66 * fragmentation within the files.
67 *
68 * If the file is empty, it was probably just created and going
69 * to be written to. If it has a size, we'll hold off until the
70 * file is actually grown.
71 */
72 if (S_ISREG(inode->i_mode) && file->f_mode & FMODE_WRITE &&
73 (inode->i_size == 0)) {
74 struct jfs_inode_info *ji = JFS_IP(inode);
75 spin_lock_irq(&ji->ag_lock);
76 if (ji->active_ag == -1) {
Dave Kleikampd31b53e2011-06-20 10:53:46 -050077 struct jfs_sb_info *jfs_sb = JFS_SBI(inode->i_sb);
78 ji->active_ag = BLKTOAG(addressPXD(&ji->ixpxd), jfs_sb);
Nan Jia55a8d022015-05-31 19:53:28 +100079 atomic_inc(&jfs_sb->bmap->db_active[ji->active_ag]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 }
81 spin_unlock_irq(&ji->ag_lock);
82 }
83
84 return 0;
85}
86static int jfs_release(struct inode *inode, struct file *file)
87{
88 struct jfs_inode_info *ji = JFS_IP(inode);
89
90 spin_lock_irq(&ji->ag_lock);
91 if (ji->active_ag != -1) {
92 struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
93 atomic_dec(&bmap->db_active[ji->active_ag]);
94 ji->active_ag = -1;
95 }
96 spin_unlock_irq(&ji->ag_lock);
97
98 return 0;
99}
100
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500101int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
102{
David Howells2b0143b2015-03-17 22:25:59 +0000103 struct inode *inode = d_inode(dentry);
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500104 int rc;
105
106 rc = inode_change_ok(inode, iattr);
107 if (rc)
108 return rc;
109
Dave Kleikampacc84b02015-07-15 13:53:19 -0500110 if (is_quota_modification(inode, iattr)) {
111 rc = dquot_initialize(inode);
112 if (rc)
113 return rc;
114 }
Eric W. Biedermanc18cdc12012-02-10 11:40:34 -0800115 if ((iattr->ia_valid & ATTR_UID && !uid_eq(iattr->ia_uid, inode->i_uid)) ||
116 (iattr->ia_valid & ATTR_GID && !gid_eq(iattr->ia_gid, inode->i_gid))) {
Christoph Hellwigb43fa822010-03-03 09:05:03 -0500117 rc = dquot_transfer(inode, iattr);
118 if (rc)
119 return rc;
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500120 }
121
Christoph Hellwig10257742010-06-04 11:30:02 +0200122 if ((iattr->ia_valid & ATTR_SIZE) &&
123 iattr->ia_size != i_size_read(inode)) {
Christoph Hellwig562c72a2011-06-24 14:29:45 -0400124 inode_dio_wait(inode);
125
Marco Stornelli86dd07d2012-12-15 11:54:25 +0100126 rc = inode_newsize_ok(inode, iattr->ia_size);
Christoph Hellwig10257742010-06-04 11:30:02 +0200127 if (rc)
128 return rc;
Marco Stornelli86dd07d2012-12-15 11:54:25 +0100129
130 truncate_setsize(inode, iattr->ia_size);
131 jfs_truncate(inode);
Christoph Hellwig10257742010-06-04 11:30:02 +0200132 }
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500133
Christoph Hellwig10257742010-06-04 11:30:02 +0200134 setattr_copy(inode, iattr);
135 mark_inode_dirty(inode);
136
137 if (iattr->ia_valid & ATTR_MODE)
Christoph Hellwig2cc6a5a2013-12-20 05:16:51 -0800138 rc = posix_acl_chmod(inode, inode->i_mode);
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500139 return rc;
140}
141
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -0800142const struct inode_operations jfs_file_inode_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 .setxattr = jfs_setxattr,
144 .getxattr = jfs_getxattr,
145 .listxattr = jfs_listxattr,
146 .removexattr = jfs_removexattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147 .setattr = jfs_setattr,
Christoph Hellwig759bfee2010-03-03 09:05:02 -0500148#ifdef CONFIG_JFS_POSIX_ACL
Christoph Hellwig4e34e712011-07-23 17:37:31 +0200149 .get_acl = jfs_get_acl,
Christoph Hellwig2cc6a5a2013-12-20 05:16:51 -0800150 .set_acl = jfs_set_acl,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151#endif
152};
153
Arjan van de Ven4b6f5d22006-03-28 01:56:42 -0800154const struct file_operations jfs_file_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 .open = jfs_open,
156 .llseek = generic_file_llseek,
Al Viroaad4f8b2014-04-02 14:33:16 -0400157 .read_iter = generic_file_read_iter,
Al Viro81742022014-04-03 03:17:43 -0400158 .write_iter = generic_file_write_iter,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 .mmap = generic_file_mmap,
Daniel Drake89f68222006-10-30 11:47:02 -0600160 .splice_read = generic_file_splice_read,
Al Viro8d020762014-04-05 04:27:08 -0400161 .splice_write = iter_file_splice_write,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 .fsync = jfs_fsync,
163 .release = jfs_release,
Andi Kleenbaab81f2008-01-27 16:58:51 -0600164 .unlocked_ioctl = jfs_ioctl,
Andi Kleenef1fc2f2008-01-27 17:02:02 -0600165#ifdef CONFIG_COMPAT
166 .compat_ioctl = jfs_compat_ioctl,
167#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168};