/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* inode.h
*
* Function prototypes
*
* Copyright (C) 2002, 2004 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#ifndef OCFS2_INODE_H
#define OCFS2_INODE_H
#include "extent_map.h"
/* OCFS2 Inode Private Data */
struct ocfs2_inode_info
{
u64 ip_blkno;
struct ocfs2_lock_res ip_rw_lockres;
struct ocfs2_lock_res ip_inode_lockres;
struct ocfs2_lock_res ip_open_lockres;
/* protects allocation changes on this inode. */
struct rw_semaphore ip_alloc_sem;
/* protects extended attribute changes on this inode */
struct rw_semaphore ip_xattr_sem;
/* These fields are protected by ip_lock */
spinlock_t ip_lock;
u32 ip_open_count;
u32 ip_clusters;
struct list_head ip_io_markers;
struct mutex ip_io_mutex;
u32 ip_flags; /* see below */
u32 ip_attr; /* inode attributes */
u16 ip_dyn_features;
/* protected by recovery_lock. */
struct inode *ip_next_orphan;
u32 ip_dir_start_lookup;
/* next two are protected by trans_inc_lock */
/* which transaction were we created on? Zero if none. */
unsigned long ip_created_trans;
struct ocfs2_caching_info ip_metadata_cache;
struct ocfs2_extent_map ip_extent_map;
struct inode vfs_inode;
struct jbd2_inode ip_jinode;
/* Only valid if the inode is the dir. */
u32 ip_last_used_slot;
u64 ip_last_used_group;
};
/*
* Flags for the ip_flags field
*/
/* System file inodes */
#define OCFS2_INODE_SYSTEM_FILE 0x00000001
#define OCFS2_INODE_JOURNAL 0x00000002
#define OCFS2_INODE_BITMAP 0x00000004
/* This inode has been wiped from disk */
#define OCFS2_INODE_DELETED 0x00000008
/* Another node is deleting, so our delete is a nop */
#define OCFS2_INODE_SKIP_DELETE 0x00000010
/* Has the inode been orphaned on another node?
*
* This hints to ocfs2_drop_inode that it should clear i_nlink before
* continuing.
*
* We *only* set this on unlink vote from another node. If the inode
* was locally orphaned, then we're sure of the state and don't need
* to twiddle i_nlink later - it's either zero or not depending on
* whether our unlink succeeded. Otherwise we got this from a node
* whose intention was to orphan the inode, however he may have
* crashed, failed etc, so we let ocfs2_drop_inode zero the value and
* rely on ocfs2_delete_inode to sort things out under the proper
* cluster locks.
*/
#define OCFS2_INODE_MAYBE_ORPHANED 0x00000020
/* Does someone have the file open O_DIRECT */
#define OCFS2_INODE_OPEN_DIRECT 0x00000040
static inline struct ocfs2_inode_info *OCFS2_I(struct inode *inode)
{
return container_of(inode, struct ocfs2_inode_info, vfs_inode);
}
#define INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags & OCFS2_INODE_JOURNAL)
#define SET_INODE_JOURNAL(i) (OCFS2_I(i)->ip_flags |= OCFS2_INODE_JOURNAL)
extern struct kmem_cache *ocfs2_inode_cache;
extern const struct address_space_operations ocfs2_aops;
extern const struct ocfs2_caching_operations ocfs2_inode_caching_ops;
static inline struct ocfs2_caching_info *INODE_CACHE(struct inode *inode)
{
return &OCFS2_I(inode)->ip_metadata_cache;
}
void ocfs2_clear_inode(struct inode *inode);
void ocfs2_delete_inode(struct inode *inode);
void ocfs2_drop_inode(struct inode *inode);
/* Flags for ocfs2_iget() */
#define OCFS2_FI_FLAG_SYSFILE 0x1
#define OCFS2_FI_FLAG_ORPHAN_RECOVERY 0x2
struct inode *ocfs2_ilookup(struct super_block *sb, u64 feoff);
struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, unsigned flags,
int sysfile_type);
int ocfs2_inode_init_private(struct inode *inode);
int ocfs2_inode_revalidate(struct dentry *dentry);
void ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
int create_ino);
void ocfs2_read_inode(struct inode *inode);
void ocfs2_read_inode2(struct inode *inode, void *opaque);
ssize_t ocfs2_rw_direct(int rw, struct file *filp, char *buf,
size_t size, loff_t *offp);
void ocfs2_sync_blockdev(struct super_block *sb);
void ocfs2_refresh_inode(struct inode *inode,
struct ocfs2_dinode *fe);
int ocfs2_mark_inode_dirty(handle_t *handle,
struct inode *inode,
struct buffer_head *bh);
int ocfs2_aio_read(struct file *file, struct kiocb *req, struct iocb *iocb);
int ocfs2_aio_write(struct file *file, struct kiocb *req, struct iocb *iocb);
struct buffer_head *ocfs2_bread(struct inode *inode,
int block, int *err, int reada);
void ocfs2_set_inode_flags(struct inode *inode);
void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi);
static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
{
int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits);
}
/* Validate that a bh contains a valid inode */
int ocfs2_validate_inode_block(struct super_block *sb,
struct buffer_head *bh);
/*
* Read an inode block into *bh. If *bh is NULL, a bh will be allocated.
* This is a cached read. The inode will be validated with
* ocfs2_validate_inode_block().
*/
int ocfs2_read_inode_block(struct inode *inode, struct buffer_head **bh);
/* The same, but can be passed OCFS2_BH_* flags */
int ocfs2_read_inode_block_full(struct inode *inode, struct buffer_head **bh,
int flags);
#endif /* OCFS2_INODE_H */
