fs/xfs/linux-2.6/xfs_vfs.h

   1 /*
   2  * Copyright (c) 2000-2006 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef __XFS_VFS_H__
  19 #define __XFS_VFS_H__
  20
  21 #include <linux/vfs.h>
  22 #include "xfs_fs.h"
  23
  24 struct inode;
  25
  26 struct fid;
  27 struct cred;
  28 struct seq_file;
  29 struct super_block;
  30 struct xfs_inode;
  31 struct xfs_mount;
  32 struct xfs_mount_args;
  33
  34 typedef struct kstatfs  bhv_statvfs_t;
  35
  36 typedef struct bhv_vfs_sync_work {
  37         struct list_head        w_list;
  38         struct xfs_mount        *w_mount;
  39         void                    *w_data;        /* syncer routine argument */
  40         void                    (*w_syncer)(struct xfs_mount *, void *);
  41 } bhv_vfs_sync_work_t;
  42
  43 #define SYNC_ATTR               0x0001  /* sync attributes */
  44 #define SYNC_CLOSE              0x0002  /* close file system down */
  45 #define SYNC_DELWRI             0x0004  /* look at delayed writes */
  46 #define SYNC_WAIT               0x0008  /* wait for i/o to complete */
  47 #define SYNC_BDFLUSH            0x0010  /* BDFLUSH is calling -- don't block */
  48 #define SYNC_FSDATA             0x0020  /* flush fs data (e.g. superblocks) */
  49 #define SYNC_REFCACHE           0x0040  /* prune some of the nfs ref cache */
  50 #define SYNC_REMOUNT            0x0080  /* remount readonly, no dummy LRs */
  51 #define SYNC_IOWAIT             0x0100  /* wait for all I/O to complete */
  52 #define SYNC_SUPER              0x0200  /* flush superblock to disk */
  53
  54 /*
  55  * When remounting a filesystem read-only or freezing the filesystem,
  56  * we have two phases to execute. This first phase is syncing the data
  57  * before we quiesce the fielsystem, and the second is flushing all the
  58  * inodes out after we've waited for all the transactions created by
  59  * the first phase to complete. The second phase uses SYNC_INODE_QUIESCE
  60  * to ensure that the inodes are written to their location on disk
  61  * rather than just existing in transactions in the log. This means
  62  * after a quiesce there is no log replay required to write the inodes
  63  * to disk (this is the main difference between a sync and a quiesce).
  64  */
  65 #define SYNC_DATA_QUIESCE       (SYNC_DELWRI|SYNC_FSDATA|SYNC_WAIT|SYNC_IOWAIT)
  66 #define SYNC_INODE_QUIESCE      (SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT)
  67
  68 #define SHUTDOWN_META_IO_ERROR  0x0001  /* write attempt to metadata failed */
  69 #define SHUTDOWN_LOG_IO_ERROR   0x0002  /* write attempt to the log failed */
  70 #define SHUTDOWN_FORCE_UMOUNT   0x0004  /* shutdown from a forced unmount */
  71 #define SHUTDOWN_CORRUPT_INCORE 0x0008  /* corrupt in-memory data structures */
  72 #define SHUTDOWN_REMOTE_REQ     0x0010  /* shutdown came from remote cell */
  73 #define SHUTDOWN_DEVICE_REQ     0x0020  /* failed all paths to the device */
  74
  75 #define xfs_test_for_freeze(mp)         ((mp)->m_super->s_frozen)
  76 #define xfs_wait_for_freeze(mp,l)       vfs_check_frozen((mp)->m_super, (l))
  77
  78 #endif  /* __XFS_VFS_H__ */