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1/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * inode.h
5 *
6 * Function prototypes
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
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.
14 *
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.
19 *
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.
24 */
25
26#ifndef OCFS2_INODE_H
27#define OCFS2_INODE_H
28
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29#include "extent_map.h"
30
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31/* OCFS2 Inode Private Data */
32struct ocfs2_inode_info
33{
34 u64 ip_blkno;
35
36 struct ocfs2_lock_res ip_rw_lockres;
e63aecb6 37 struct ocfs2_lock_res ip_inode_lockres;
50008630 38 struct ocfs2_lock_res ip_open_lockres;
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39
40 /* protects allocation changes on this inode. */
41 struct rw_semaphore ip_alloc_sem;
42
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43 /* protects extended attribute changes on this inode */
44 struct rw_semaphore ip_xattr_sem;
45
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46 /* These fields are protected by ip_lock */
47 spinlock_t ip_lock;
48 u32 ip_open_count;
ccd979bd 49 struct list_head ip_io_markers;
83fd9c7f 50 u32 ip_clusters;
ccd979bd 51
83fd9c7f 52 u16 ip_dyn_features;
251b6ecc 53 struct mutex ip_io_mutex;
ccd979bd 54 u32 ip_flags; /* see below */
ca4d147e 55 u32 ip_attr; /* inode attributes */
ccd979bd 56
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57 /* Record unwritten extents during direct io. */
58 struct list_head ip_unwritten_list;
59
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60 /* protected by recovery_lock. */
61 struct inode *ip_next_orphan;
62
ccd979bd 63 struct ocfs2_caching_info ip_metadata_cache;
83418978 64 struct ocfs2_extent_map ip_extent_map;
ccd979bd 65 struct inode vfs_inode;
2b4e30fb 66 struct jbd2_inode ip_jinode;
13821151 67
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68 u32 ip_dir_start_lookup;
69
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70 /* Only valid if the inode is the dir. */
71 u32 ip_last_used_slot;
72 u64 ip_last_used_group;
5e98d492 73 u32 ip_dir_lock_gen;
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74
75 struct ocfs2_alloc_reservation ip_la_data_resv;
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76
77 /*
78 * Transactions that contain inode's metadata needed to complete
79 * fsync and fdatasync, respectively.
80 */
81 tid_t i_sync_tid;
82 tid_t i_datasync_tid;
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83
84 struct dquot *i_dquot[MAXQUOTAS];
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85};
86
87/*
88 * Flags for the ip_flags field
89 */
90/* System file inodes */
91#define OCFS2_INODE_SYSTEM_FILE 0x00000001
92#define OCFS2_INODE_JOURNAL 0x00000002
93#define OCFS2_INODE_BITMAP 0x00000004
94/* This inode has been wiped from disk */
95#define OCFS2_INODE_DELETED 0x00000008
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96/* Has the inode been orphaned on another node?
97 *
98 * This hints to ocfs2_drop_inode that it should clear i_nlink before
99 * continuing.
100 *
101 * We *only* set this on unlink vote from another node. If the inode
102 * was locally orphaned, then we're sure of the state and don't need
103 * to twiddle i_nlink later - it's either zero or not depending on
104 * whether our unlink succeeded. Otherwise we got this from a node
105 * whose intention was to orphan the inode, however he may have
106 * crashed, failed etc, so we let ocfs2_drop_inode zero the value and
107 * rely on ocfs2_delete_inode to sort things out under the proper
108 * cluster locks.
109 */
7bf619c1 110#define OCFS2_INODE_MAYBE_ORPHANED 0x00000010
ccd979bd 111/* Does someone have the file open O_DIRECT */
7bf619c1 112#define OCFS2_INODE_OPEN_DIRECT 0x00000020
d4cd1871 113/* Tell the inode wipe code it's not in orphan dir */
7bf619c1 114#define OCFS2_INODE_SKIP_ORPHAN_DIR 0x00000040
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115/* Entry in orphan dir with 'dio-' prefix */
116#define OCFS2_INODE_DIO_ORPHAN_ENTRY 0x00000080
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117
118static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
119{
120 return container_of(inode, struct ocfs2_inode_info, vfs_inode);
121}
122
123#define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
124#define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
125
f5e54d6e 126extern const struct address_space_operations ocfs2_aops;
6e5a3d75 127extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops;
ccd979bd 128
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129static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode)
130{
131 return &OCFS2_I(inode)->ip_metadata_cache;
132}
133
066d92dc 134void ocfs2_evict_inode(struct inode *inode);
45321ac5 135int ocfs2_drop_inode(struct inode *inode);
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136
137/* Flags for ocfs2_iget() */
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138#define OCFS2_FI_FLAG_SYSFILE 0x1
139#define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2
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140#define OCFS2_FI_FLAG_FILECHECK_CHK 0x4
141#define OCFS2_FI_FLAG_FILECHECK_FIX 0x8
142
6ca497a8 143struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff);
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144struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags,
145 int sysfile_type);
ccd979bd 146int ocfs2_inode_revalidate(struct dentry *dentry);
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147void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
148 int create_ino);
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149void ocfs2_sync_blockdev(struct super_block *sb);
150void ocfs2_refresh_inode(struct inode *inode,
151 struct ocfs2_dinode *fe);
1fabe148 152int ocfs2_mark_inode_dirty(handle_t *handle,
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153 struct inode *inode,
154 struct buffer_head *bh);
ccd979bd 155
ca4d147e 156void ocfs2_set_inode_flags(struct inode *inode);
6e4b0d56 157void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
ca4d147e 158
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159static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
160{
161 int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
162
7fa05c6e 163 return (blkcnt_t)OCFS2_I(inode)->ip_clusters << c_to_s_bits;
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164}
165
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166/* Validate that a bh contains a valid inode */
167int ocfs2_validate_inode_block(struct super_block *sb,
168 struct buffer_head *bh);
169/*
170 * Read an inode block into *bh. If *bh is NULL, a bh will be allocated.
171 * This is a cached read. The inode will be validated with
172 * ocfs2_validate_inode_block().
173 */
174int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh);
175/* The same, but can be passed OCFS2_BH_* flags */
176int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
177 int flags);
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178
179static inline struct ocfs2_inode_info *cache_info_to_inode(struct ocfs2_caching_info *ci)
180{
181 return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache);
182}
183
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184/* Does this inode have the reflink flag set? */
185static inline bool ocfs2_is_refcount_inode(struct inode *inode)
186{
187 return (OCFS2_I(inode)->ip_dyn_features & OCFS2_HAS_REFCOUNT_FL);
188}
189
ccd979bd 190#endif /* OCFS2_INODE_H */