jbd: Journal block numbers can ever be only 32-bit use unsigned int for them
[linux/fpc-iii.git] / fs / ocfs2 / inode.h
blobea71525aad41fdc4070cd52890d6385359dec7f5
1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
4 * inode.h
6 * Function prototypes
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.
26 #ifndef OCFS2_INODE_H
27 #define OCFS2_INODE_H
29 #include "extent_map.h"
31 /* OCFS2 Inode Private Data */
32 struct ocfs2_inode_info
34 u64 ip_blkno;
36 struct ocfs2_lock_res ip_rw_lockres;
37 struct ocfs2_lock_res ip_inode_lockres;
38 struct ocfs2_lock_res ip_open_lockres;
40 /* protects allocation changes on this inode. */
41 struct rw_semaphore ip_alloc_sem;
43 /* protects extended attribute changes on this inode */
44 struct rw_semaphore ip_xattr_sem;
46 /* These fields are protected by ip_lock */
47 spinlock_t ip_lock;
48 u32 ip_open_count;
49 u32 ip_clusters;
50 struct list_head ip_io_markers;
52 struct mutex ip_io_mutex;
54 u32 ip_flags; /* see below */
55 u32 ip_attr; /* inode attributes */
56 u16 ip_dyn_features;
58 /* protected by recovery_lock. */
59 struct inode *ip_next_orphan;
61 u32 ip_dir_start_lookup;
63 /* next two are protected by trans_inc_lock */
64 /* which transaction were we created on? Zero if none. */
65 unsigned long ip_created_trans;
66 /* last transaction we were a part of. */
67 unsigned long ip_last_trans;
69 struct ocfs2_caching_info ip_metadata_cache;
71 struct ocfs2_extent_map ip_extent_map;
73 struct inode vfs_inode;
74 struct jbd2_inode ip_jinode;
76 /* Only valid if the inode is the dir. */
77 u32 ip_last_used_slot;
78 u64 ip_last_used_group;
82 * Flags for the ip_flags field
84 /* System file inodes */
85 #define OCFS2_INODE_SYSTEM_FILE 0x00000001
86 #define OCFS2_INODE_JOURNAL 0x00000002
87 #define OCFS2_INODE_BITMAP 0x00000004
88 /* This inode has been wiped from disk */
89 #define OCFS2_INODE_DELETED 0x00000008
90 /* Another node is deleting, so our delete is a nop */
91 #define OCFS2_INODE_SKIP_DELETE 0x00000010
92 /* Has the inode been orphaned on another node?
94 * This hints to ocfs2_drop_inode that it should clear i_nlink before
95 * continuing.
97 * We *only* set this on unlink vote from another node. If the inode
98 * was locally orphaned, then we're sure of the state and don't need
99 * to twiddle i_nlink later - it's either zero or not depending on
100 * whether our unlink succeeded. Otherwise we got this from a node
101 * whose intention was to orphan the inode, however he may have
102 * crashed, failed etc, so we let ocfs2_drop_inode zero the value and
103 * rely on ocfs2_delete_inode to sort things out under the proper
104 * cluster locks.
106 #define OCFS2_INODE_MAYBE_ORPHANED 0x00000020
107 /* Does someone have the file open O_DIRECT */
108 #define OCFS2_INODE_OPEN_DIRECT 0x00000040
109 /* Indicates that the metadata cache should be used as an array. */
110 #define OCFS2_INODE_CACHE_INLINE 0x00000080
112 static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
114 return container_of(inode, struct ocfs2_inode_info, vfs_inode);
117 #define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
118 #define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
120 extern struct kmem_cache *ocfs2_inode_cache;
122 extern const struct address_space_operations ocfs2_aops;
124 void ocfs2_clear_inode(struct inode *inode);
125 void ocfs2_delete_inode(struct inode *inode);
126 void ocfs2_drop_inode(struct inode *inode);
128 /* Flags for ocfs2_iget() */
129 #define OCFS2_FI_FLAG_SYSFILE 0x1
130 #define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2
131 struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff);
132 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags,
133 int sysfile_type);
134 int ocfs2_inode_init_private(struct inode *inode);
135 int ocfs2_inode_revalidate(struct dentry *dentry);
136 void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
137 int create_ino);
138 void ocfs2_read_inode(struct inode *inode);
139 void ocfs2_read_inode2(struct inode *inode, void *opaque);
140 ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf,
141 size_t size, loff_t *offp);
142 void ocfs2_sync_blockdev(struct super_block *sb);
143 void ocfs2_refresh_inode(struct inode *inode,
144 struct ocfs2_dinode *fe);
145 int ocfs2_mark_inode_dirty(handle_t *handle,
146 struct inode *inode,
147 struct buffer_head *bh);
148 int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb);
149 int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb);
150 struct buffer_head *ocfs2_bread(struct inode *inode,
151 int block, int *err, int reada);
153 void ocfs2_set_inode_flags(struct inode *inode);
154 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
156 static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
158 int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
160 return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits);
163 /* Validate that a bh contains a valid inode */
164 int ocfs2_validate_inode_block(struct super_block *sb,
165 struct buffer_head *bh);
167 * Read an inode block into *bh. If *bh is NULL, a bh will be allocated.
168 * This is a cached read. The inode will be validated with
169 * ocfs2_validate_inode_block().
171 int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh);
172 /* The same, but can be passed OCFS2_BH_* flags */
173 int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
174 int flags);
175 #endif /* OCFS2_INODE_H */