1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * Initialize, read, write, etc. system files.
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
27 #include <linux/types.h>
28 #include <linux/slab.h>
29 #include <linux/highmem.h>
31 #define MLOG_MASK_PREFIX ML_INODE
32 #include <cluster/masklog.h>
42 #include "buffer_head_io.h"
44 static struct inode
* _ocfs2_get_system_file_inode(struct ocfs2_super
*osb
,
48 static inline int is_global_system_inode(int type
);
49 static inline int is_in_system_inode_array(struct ocfs2_super
*osb
,
53 static struct lock_class_key ocfs2_sysfile_cluster_lock_key
[NUM_SYSTEM_INODES
];
55 static inline int is_global_system_inode(int type
)
57 return type
>= OCFS2_FIRST_ONLINE_SYSTEM_INODE
&&
58 type
<= OCFS2_LAST_GLOBAL_SYSTEM_INODE
;
61 static inline int is_in_system_inode_array(struct ocfs2_super
*osb
,
65 return slot
== osb
->slot_num
|| is_global_system_inode(type
);
68 struct inode
*ocfs2_get_system_file_inode(struct ocfs2_super
*osb
,
72 struct inode
*inode
= NULL
;
73 struct inode
**arr
= NULL
;
75 /* avoid the lookup if cached in local system file array */
76 if (is_in_system_inode_array(osb
, type
, slot
))
77 arr
= &(osb
->system_inodes
[type
]);
79 if (arr
&& ((inode
= *arr
) != NULL
)) {
80 /* get a ref in addition to the array ref */
87 /* this gets one ref thru iget */
88 inode
= _ocfs2_get_system_file_inode(osb
, type
, slot
);
90 /* add one more if putting into array for first time */
98 static struct inode
* _ocfs2_get_system_file_inode(struct ocfs2_super
*osb
,
103 struct inode
*inode
= NULL
;
107 ocfs2_sprintf_system_inode_name(namebuf
,
111 status
= ocfs2_lookup_ino_from_name(osb
->sys_root_inode
, namebuf
,
112 strlen(namebuf
), &blkno
);
117 inode
= ocfs2_iget(osb
, blkno
, OCFS2_FI_FLAG_SYSFILE
, type
);
119 mlog_errno(PTR_ERR(inode
));
123 #ifdef CONFIG_DEBUG_LOCK_ALLOC
124 if (type
== LOCAL_USER_QUOTA_SYSTEM_INODE
||
125 type
== LOCAL_GROUP_QUOTA_SYSTEM_INODE
||
126 type
== JOURNAL_SYSTEM_INODE
) {
127 /* Ignore inode lock on these inodes as the lock does not
128 * really belong to any process and lockdep cannot handle
130 OCFS2_I(inode
)->ip_inode_lockres
.l_lockdep_map
.key
= NULL
;
132 lockdep_init_map(&OCFS2_I(inode
)->ip_inode_lockres
.
134 ocfs2_system_inodes
[type
].si_name
,
135 &ocfs2_sysfile_cluster_lock_key
[type
], 0);