blob: eb3c302b38d34c15d96057ff4484e22ba9574999 [file] [log] [blame]
Mark Fashehccd979b2005-12-15 14:31:24 -08001/* -*- 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
Mark Fasheh83418972007-04-23 18:53:12 -070029#include "extent_map.h"
30
Mark Fashehccd979b2005-12-15 14:31:24 -080031/* OCFS2 Inode Private Data */
32struct ocfs2_inode_info
33{
34 u64 ip_blkno;
35
36 struct ocfs2_lock_res ip_rw_lockres;
Mark Fashehe63aecb62007-10-18 15:30:42 -070037 struct ocfs2_lock_res ip_inode_lockres;
Tiger Yang50008632007-03-20 16:01:38 -070038 struct ocfs2_lock_res ip_open_lockres;
Mark Fashehccd979b2005-12-15 14:31:24 -080039
40 /* protects allocation changes on this inode. */
41 struct rw_semaphore ip_alloc_sem;
42
Tiger Yangcf1d6c72008-08-18 17:11:00 +080043 /* protects extended attribute changes on this inode */
44 struct rw_semaphore ip_xattr_sem;
45
Mark Fashehccd979b2005-12-15 14:31:24 -080046 /* These fields are protected by ip_lock */
47 spinlock_t ip_lock;
48 u32 ip_open_count;
49 u32 ip_clusters;
Mark Fashehccd979b2005-12-15 14:31:24 -080050 struct list_head ip_io_markers;
Mark Fashehccd979b2005-12-15 14:31:24 -080051
Mark Fasheh251b6ec2006-01-10 15:41:43 -080052 struct mutex ip_io_mutex;
Mark Fashehccd979b2005-12-15 14:31:24 -080053
Mark Fashehccd979b2005-12-15 14:31:24 -080054 u32 ip_flags; /* see below */
Herbert Poetzlca4d1472006-07-03 17:27:12 -070055 u32 ip_attr; /* inode attributes */
Mark Fasheh15b1e362007-09-07 13:58:15 -070056 u16 ip_dyn_features;
Mark Fashehccd979b2005-12-15 14:31:24 -080057
58 /* protected by recovery_lock. */
59 struct inode *ip_next_orphan;
60
61 u32 ip_dir_start_lookup;
62
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;
68
69 struct ocfs2_caching_info ip_metadata_cache;
70
Mark Fasheh83418972007-04-23 18:53:12 -070071 struct ocfs2_extent_map ip_extent_map;
72
Mark Fashehccd979b2005-12-15 14:31:24 -080073 struct inode vfs_inode;
Joel Becker2b4e30f2008-09-03 20:03:41 -070074 struct jbd2_inode ip_jinode;
Mark Fashehccd979b2005-12-15 14:31:24 -080075};
76
77/*
78 * Flags for the ip_flags field
79 */
80/* System file inodes */
81#define OCFS2_INODE_SYSTEM_FILE 0x00000001
82#define OCFS2_INODE_JOURNAL 0x00000002
83#define OCFS2_INODE_BITMAP 0x00000004
84/* This inode has been wiped from disk */
85#define OCFS2_INODE_DELETED 0x00000008
86/* Another node is deleting, so our delete is a nop */
87#define OCFS2_INODE_SKIP_DELETE 0x00000010
88/* Has the inode been orphaned on another node?
89 *
90 * This hints to ocfs2_drop_inode that it should clear i_nlink before
91 * continuing.
92 *
93 * We *only* set this on unlink vote from another node. If the inode
94 * was locally orphaned, then we're sure of the state and don't need
95 * to twiddle i_nlink later - it's either zero or not depending on
96 * whether our unlink succeeded. Otherwise we got this from a node
97 * whose intention was to orphan the inode, however he may have
98 * crashed, failed etc, so we let ocfs2_drop_inode zero the value and
99 * rely on ocfs2_delete_inode to sort things out under the proper
100 * cluster locks.
101 */
102#define OCFS2_INODE_MAYBE_ORPHANED 0x00000020
103/* Does someone have the file open O_DIRECT */
104#define OCFS2_INODE_OPEN_DIRECT 0x00000040
105/* Indicates that the metadata cache should be used as an array. */
106#define OCFS2_INODE_CACHE_INLINE 0x00000080
107
108static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
109{
110 return container_of(inode, struct ocfs2_inode_info, vfs_inode);
111}
112
113#define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
114#define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
115
Christoph Lametere18b8902006-12-06 20:33:20 -0800116extern struct kmem_cache *ocfs2_inode_cache;
Mark Fashehccd979b2005-12-15 14:31:24 -0800117
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700118extern const struct address_space_operations ocfs2_aops;
Mark Fashehccd979b2005-12-15 14:31:24 -0800119
Mark Fashehccd979b2005-12-15 14:31:24 -0800120void ocfs2_clear_inode(struct inode *inode);
121void ocfs2_delete_inode(struct inode *inode);
122void ocfs2_drop_inode(struct inode *inode);
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700123
124/* Flags for ocfs2_iget() */
Jan Kara5fa06132008-01-11 00:11:45 +0100125#define OCFS2_FI_FLAG_SYSFILE 0x1
126#define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2
127struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags,
128 int sysfile_type);
Mark Fashehccd979b2005-12-15 14:31:24 -0800129int ocfs2_inode_init_private(struct inode *inode);
130int ocfs2_inode_revalidate(struct dentry *dentry);
Joel Beckerb657c952008-11-13 14:49:11 -0800131void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
132 int create_ino);
Mark Fashehccd979b2005-12-15 14:31:24 -0800133void ocfs2_read_inode(struct inode *inode);
134void ocfs2_read_inode2(struct inode *inode, void *opaque);
135ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf,
136 size_t size, loff_t *offp);
137void ocfs2_sync_blockdev(struct super_block *sb);
138void ocfs2_refresh_inode(struct inode *inode,
139 struct ocfs2_dinode *fe);
Mark Fasheh1fabe142006-10-09 18:11:45 -0700140int ocfs2_mark_inode_dirty(handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -0800141 struct inode *inode,
142 struct buffer_head *bh);
143int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb);
144int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb);
Jan Kara9e33d692008-08-25 19:56:50 +0200145struct buffer_head *ocfs2_bread(struct inode *inode,
146 int block, int *err, int reada);
Mark Fashehccd979b2005-12-15 14:31:24 -0800147
Herbert Poetzlca4d1472006-07-03 17:27:12 -0700148void ocfs2_set_inode_flags(struct inode *inode);
Jan Kara6e4b0d52007-04-27 11:08:01 -0700149void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
Herbert Poetzlca4d1472006-07-03 17:27:12 -0700150
Mark Fasheh8110b072007-03-22 16:53:23 -0700151static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
152{
153 int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
154
155 return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits);
156}
157
Joel Beckerb657c952008-11-13 14:49:11 -0800158/* Validate that a bh contains a valid inode */
159int ocfs2_validate_inode_block(struct super_block *sb,
160 struct buffer_head *bh);
161/*
162 * Read an inode block into *bh. If *bh is NULL, a bh will be allocated.
163 * This is a cached read. The inode will be validated with
164 * ocfs2_validate_inode_block().
165 */
166int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh);
167/* The same, but can be passed OCFS2_BH_* flags */
168int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
169 int flags);
Mark Fashehccd979b2005-12-15 14:31:24 -0800170#endif /* OCFS2_INODE_H */