blob: 88924a3133fae7c15ca3f5a5259b64eecd97022e [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 Fasheha11f7e62011-06-22 14:23:38 -070046 /* Number of outstanding AIO's which are not page aligned */
47 atomic_t ip_unaligned_aio;
48
Mark Fashehccd979b2005-12-15 14:31:24 -080049 /* These fields are protected by ip_lock */
50 spinlock_t ip_lock;
51 u32 ip_open_count;
Mark Fashehccd979b2005-12-15 14:31:24 -080052 struct list_head ip_io_markers;
Goldwyn Rodrigues83fd9c72010-06-10 17:21:36 -050053 u32 ip_clusters;
Mark Fashehccd979b2005-12-15 14:31:24 -080054
Goldwyn Rodrigues83fd9c72010-06-10 17:21:36 -050055 u16 ip_dyn_features;
Mark Fasheh251b6ec2006-01-10 15:41:43 -080056 struct mutex ip_io_mutex;
Mark Fashehccd979b2005-12-15 14:31:24 -080057 u32 ip_flags; /* see below */
Herbert Poetzlca4d1472006-07-03 17:27:12 -070058 u32 ip_attr; /* inode attributes */
Mark Fashehccd979b2005-12-15 14:31:24 -080059
60 /* protected by recovery_lock. */
61 struct inode *ip_next_orphan;
62
Mark Fashehccd979b2005-12-15 14:31:24 -080063 struct ocfs2_caching_info ip_metadata_cache;
Mark Fasheh83418972007-04-23 18:53:12 -070064 struct ocfs2_extent_map ip_extent_map;
Mark Fashehccd979b2005-12-15 14:31:24 -080065 struct inode vfs_inode;
Joel Becker2b4e30f2008-09-03 20:03:41 -070066 struct jbd2_inode ip_jinode;
Tao Ma13821152009-02-25 00:53:23 +080067
Goldwyn Rodrigues83fd9c72010-06-10 17:21:36 -050068 u32 ip_dir_start_lookup;
69
Tao Ma13821152009-02-25 00:53:23 +080070 /* Only valid if the inode is the dir. */
71 u32 ip_last_used_slot;
72 u64 ip_last_used_group;
Goldwyn Rodrigues5e98d492010-06-28 10:04:32 -050073 u32 ip_dir_lock_gen;
Mark Fasheh4fe370a2009-12-07 13:15:40 -080074
75 struct ocfs2_alloc_reservation ip_la_data_resv;
Mark Fashehccd979b2005-12-15 14:31:24 -080076};
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
Li Dongyangd4cd1872010-04-22 16:11:19 +0800106/* Tell the inode wipe code it's not in orphan dir */
107#define OCFS2_INODE_SKIP_ORPHAN_DIR 0x00000080
Mark Fashehccd979b2005-12-15 14:31:24 -0800108
109static 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
Christoph Lametere18b8902006-12-06 20:33:20 -0800117extern struct kmem_cache *ocfs2_inode_cache;
Mark Fashehccd979b2005-12-15 14:31:24 -0800118
Christoph Hellwigf5e54d62006-06-28 04:26:44 -0700119extern const struct address_space_operations ocfs2_aops;
Joel Becker6e5a3d72009-02-10 19:00:37 -0800120extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops;
Mark Fashehccd979b2005-12-15 14:31:24 -0800121
Joel Becker8cb471e2009-02-10 20:00:41 -0800122static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode)
123{
124 return &OCFS2_I(inode)->ip_metadata_cache;
125}
126
Al Viro066d92d2010-06-08 21:28:10 -0400127void ocfs2_evict_inode(struct inode *inode);
Al Viro45321ac2010-06-07 13:43:19 -0400128int ocfs2_drop_inode(struct inode *inode);
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700129
130/* Flags for ocfs2_iget() */
Jan Kara5fa06132008-01-11 00:11:45 +0100131#define OCFS2_FI_FLAG_SYSFILE 0x1
132#define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2
wengang wang6ca497a2009-03-06 21:29:10 +0800133struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff);
Jan Kara5fa06132008-01-11 00:11:45 +0100134struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags,
135 int sysfile_type);
Mark Fashehccd979b2005-12-15 14:31:24 -0800136int ocfs2_inode_init_private(struct inode *inode);
137int ocfs2_inode_revalidate(struct dentry *dentry);
Joel Beckerb657c952008-11-13 14:49:11 -0800138void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
139 int create_ino);
Mark Fashehccd979b2005-12-15 14:31:24 -0800140void ocfs2_read_inode(struct inode *inode);
141void ocfs2_read_inode2(struct inode *inode, void *opaque);
142ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf,
143 size_t size, loff_t *offp);
144void ocfs2_sync_blockdev(struct super_block *sb);
145void ocfs2_refresh_inode(struct inode *inode,
146 struct ocfs2_dinode *fe);
Mark Fasheh1fabe142006-10-09 18:11:45 -0700147int ocfs2_mark_inode_dirty(handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -0800148 struct inode *inode,
149 struct buffer_head *bh);
150int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb);
151int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb);
Jan Kara9e33d692008-08-25 19:56:50 +0200152struct buffer_head *ocfs2_bread(struct inode *inode,
153 int block, int *err, int reada);
Mark Fashehccd979b2005-12-15 14:31:24 -0800154
Herbert Poetzlca4d1472006-07-03 17:27:12 -0700155void ocfs2_set_inode_flags(struct inode *inode);
Jan Kara6e4b0d52007-04-27 11:08:01 -0700156void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
Herbert Poetzlca4d1472006-07-03 17:27:12 -0700157
Mark Fasheh8110b072007-03-22 16:53:23 -0700158static 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
Joel Beckerb657c952008-11-13 14:49:11 -0800165/* Validate that a bh contains a valid inode */
166int 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 */
173int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh);
174/* The same, but can be passed OCFS2_BH_* flags */
175int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
176 int flags);
Joel Becker6136ca52009-02-12 19:32:43 -0800177
178static 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
Mark Fashehccd979b2005-12-15 14:31:24 -0800183#endif /* OCFS2_INODE_H */