root/fs/xfs/linux-2.6/xfs_vfs.h

INCLUDED FROM

/*
 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
 * 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.
 *
 * This program is distributed in the hope that it would 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 the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#ifndef __XFS_VFS_H__
#define __XFS_VFS_H__

#include <linux/vfs.h>
#include "xfs_fs.h"

struct inode;

struct fid;
struct cred;
struct seq_file;
struct super_block;
struct xfs_inode;
struct xfs_mount;
struct xfs_mount_args;

typedef struct kstatfs  bhv_statvfs_t;

typedef struct bhv_vfs_sync_work {
        struct list_head        w_list;
        struct xfs_mount        *w_mount;
        void                    *w_data;        /* syncer routine argument */
        void                    (*w_syncer)(struct xfs_mount *, void *);
} bhv_vfs_sync_work_t;

#define SYNC_ATTR               0x0001  /* sync attributes */
#define SYNC_CLOSE              0x0002  /* close file system down */
#define SYNC_DELWRI             0x0004  /* look at delayed writes */
#define SYNC_WAIT               0x0008  /* wait for i/o to complete */
#define SYNC_BDFLUSH            0x0010  /* BDFLUSH is calling -- don't block */
#define SYNC_FSDATA             0x0020  /* flush fs data (e.g. superblocks) */
#define SYNC_REFCACHE           0x0040  /* prune some of the nfs ref cache */
#define SYNC_REMOUNT            0x0080  /* remount readonly, no dummy LRs */
#define SYNC_IOWAIT             0x0100  /* wait for all I/O to complete */

/*
 * When remounting a filesystem read-only or freezing the filesystem,
 * we have two phases to execute. This first phase is syncing the data
 * before we quiesce the fielsystem, and the second is flushing all the
 * inodes out after we've waited for all the transactions created by
 * the first phase to complete. The second phase uses SYNC_INODE_QUIESCE
 * to ensure that the inodes are written to their location on disk
 * rather than just existing in transactions in the log. This means
 * after a quiesce there is no log replay required to write the inodes
 * to disk (this is the main difference between a sync and a quiesce).
 */
#define SYNC_DATA_QUIESCE       (SYNC_DELWRI|SYNC_FSDATA|SYNC_WAIT|SYNC_IOWAIT)
#define SYNC_INODE_QUIESCE      (SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT)

#define SHUTDOWN_META_IO_ERROR  0x0001  /* write attempt to metadata failed */
#define SHUTDOWN_LOG_IO_ERROR   0x0002  /* write attempt to the log failed */
#define SHUTDOWN_FORCE_UMOUNT   0x0004  /* shutdown from a forced unmount */
#define SHUTDOWN_CORRUPT_INCORE 0x0008  /* corrupt in-memory data structures */
#define SHUTDOWN_REMOTE_REQ     0x0010  /* shutdown came from remote cell */
#define SHUTDOWN_DEVICE_REQ     0x0020  /* failed all paths to the device */

#define xfs_test_for_freeze(mp)         ((mp)->m_super->s_frozen)
#define xfs_wait_for_freeze(mp,l)       vfs_check_frozen((mp)->m_super, (l))

#endif  /* __XFS_VFS_H__ */