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
29 #include "extent_map.h"
30
31 /* OCFS2 Inode Private Data */
32 struct ocfs2_inode_info
33 {
34 u64 ip_blkno;
35
36 struct ocfs2_lock_res ip_rw_lockres;
37 struct ocfs2_lock_res ip_inode_lockres;
38 struct ocfs2_lock_res ip_open_lockres;
39
40 /* protects allocation changes on this inode. */
41 struct rw_semaphore ip_alloc_sem;
42
43 /* protects extended attribute changes on this inode */
44 struct rw_semaphore ip_xattr_sem;
45
46 /* Number of outstanding AIO's which are not page aligned */
47 atomic_t ip_unaligned_aio;
48
49 /* These fields are protected by ip_lock */
50 spinlock_t ip_lock;
51 u32 ip_open_count;
52 struct list_head ip_io_markers;
53 u32 ip_clusters;
54
55 u16 ip_dyn_features;
56 struct mutex ip_io_mutex;
57 u32 ip_flags; /* see below */
58 u32 ip_attr; /* inode attributes */
59
60 /* protected by recovery_lock. */
61 struct inode *ip_next_orphan;
62
63 struct ocfs2_caching_info ip_metadata_cache;
64 struct ocfs2_extent_map ip_extent_map;
65 struct inode vfs_inode;
66 struct jbd2_inode ip_jinode;
67
68 u32 ip_dir_start_lookup;
69
70 /* Only valid if the inode is the dir. */
71 u32 ip_last_used_slot;
72 u64 ip_last_used_group;
73 u32 ip_dir_lock_gen;
74
75 struct ocfs2_alloc_reservation ip_la_data_resv;
76 };
77
78 /*
79 * Flags for the ip_flags field
80 */
81 /* System file inodes */
82 #define OCFS2_INODE_SYSTEM_FILE 0x00000001
83 #define OCFS2_INODE_JOURNAL 0x00000002
84 #define OCFS2_INODE_BITMAP 0x00000004
85 /* This inode has been wiped from disk */
86 #define OCFS2_INODE_DELETED 0x00000008
87 /* Another node is deleting, so our delete is a nop */
88 #define OCFS2_INODE_SKIP_DELETE 0x00000010
89 /* Has the inode been orphaned on another node?
90 *
91 * This hints to ocfs2_drop_inode that it should clear i_nlink before
92 * continuing.
93 *
94 * We *only* set this on unlink vote from another node. If the inode
95 * was locally orphaned, then we're sure of the state and don't need
96 * to twiddle i_nlink later - it's either zero or not depending on
97 * whether our unlink succeeded. Otherwise we got this from a node
98 * whose intention was to orphan the inode, however he may have
99 * crashed, failed etc, so we let ocfs2_drop_inode zero the value and
100 * rely on ocfs2_delete_inode to sort things out under the proper
101 * cluster locks.
102 */
103 #define OCFS2_INODE_MAYBE_ORPHANED 0x00000020
104 /* Does someone have the file open O_DIRECT */
105 #define OCFS2_INODE_OPEN_DIRECT 0x00000040
106 /* Tell the inode wipe code it's not in orphan dir */
107 #define OCFS2_INODE_SKIP_ORPHAN_DIR 0x00000080
108
OCFS2_I(struct inode * inode)109 static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
110 {
111 return container_of(inode, struct ocfs2_inode_info, vfs_inode);
112 }
113
114 #define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
115 #define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
116
117 extern struct kmem_cache *ocfs2_inode_cache;
118
119 extern const struct address_space_operations ocfs2_aops;
120 extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops;
121
INODE_CACHE(struct inode * inode)122 static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode)
123 {
124 return &OCFS2_I(inode)->ip_metadata_cache;
125 }
126
127 void ocfs2_evict_inode(struct inode *inode);
128 int ocfs2_drop_inode(struct inode *inode);
129
130 /* Flags for ocfs2_iget() */
131 #define OCFS2_FI_FLAG_SYSFILE 0x1
132 #define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2
133 struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff);
134 struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags,
135 int sysfile_type);
136 int ocfs2_inode_init_private(struct inode *inode);
137 int ocfs2_inode_revalidate(struct dentry *dentry);
138 void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
139 int create_ino);
140 void ocfs2_read_inode(struct inode *inode);
141 void ocfs2_read_inode2(struct inode *inode, void *opaque);
142 ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf,
143 size_t size, loff_t *offp);
144 void ocfs2_sync_blockdev(struct super_block *sb);
145 void ocfs2_refresh_inode(struct inode *inode,
146 struct ocfs2_dinode *fe);
147 int ocfs2_mark_inode_dirty(handle_t *handle,
148 struct inode *inode,
149 struct buffer_head *bh);
150 int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb);
151 int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb);
152 struct buffer_head *ocfs2_bread(struct inode *inode,
153 int block, int *err, int reada);
154
155 void ocfs2_set_inode_flags(struct inode *inode);
156 void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
157
ocfs2_inode_sector_count(struct inode * inode)158 static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
159 {
160 int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
161
162 return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits);
163 }
164
165 /* Validate that a bh contains a valid inode */
166 int ocfs2_validate_inode_block(struct super_block *sb,
167 struct buffer_head *bh);
168 /*
169 * Read an inode block into *bh. If *bh is NULL, a bh will be allocated.
170 * This is a cached read. The inode will be validated with
171 * ocfs2_validate_inode_block().
172 */
173 int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh);
174 /* The same, but can be passed OCFS2_BH_* flags */
175 int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
176 int flags);
177
cache_info_to_inode(struct ocfs2_caching_info * ci)178 static inline struct ocfs2_inode_info *cache_info_to_inode(struct ocfs2_caching_info *ci)
179 {
180 return container_of(ci, struct ocfs2_inode_info, ip_metadata_cache);
181 }
182
183 #endif /* OCFS2_INODE_H */
184