Subversion Repositories test_project

/* -*- 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_meta_lockres;

        struct ocfs2_lock_res           ip_data_lockres;

        struct ocfs2_lock_res           ip_open_lockres;

        /* protects allocation changes on this inode. */

        struct rw_semaphore             ip_alloc_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;

        /* last transaction we were a part of. */

        unsigned long                   ip_last_trans;

        struct ocfs2_caching_info       ip_metadata_cache;

        struct ocfs2_extent_map         ip_extent_map;

        struct inode                    vfs_inode;

};

/*

 * 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

/* Indicates that the metadata cache should be used as an array. */

#define OCFS2_INODE_CACHE_INLINE        0x00000080

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;

struct buffer_head *ocfs2_bread(struct inode *inode, int block,

                                int *err, int reada);

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           0x4

#define OCFS2_FI_FLAG_ORPHAN_RECOVERY   0x8

struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 feoff, int flags);

int ocfs2_inode_init_private(struct inode *inode);

int ocfs2_inode_revalidate(struct dentry *dentry);

int 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);

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);

}

#endif /* OCFS2_INODE_H */