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linux-next/fs/xfs/linux-2.6/xfs_vfs.h
Christoph Hellwig f898d6c09c [XFS] quiesce the filesystem proper when freezing 
SGI-PV: 936977
SGI-Modid: xfs-linux:xfs-kern:193840a

Signed-off-by: Christoph Hellwig <hch@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>
2005-06-21 15:40:48 +10:00

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/*
* Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of version 2 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.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston MA 02111-1307, USA.
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
*/
#ifndef __XFS_VFS_H__
#define __XFS_VFS_H__
#include <linux/vfs.h>
#include "xfs_fs.h"
struct fid;
struct vfs;
struct cred;
struct vnode;
struct kstatfs;
struct seq_file;
struct super_block;
struct xfs_mount_args;
typedef struct kstatfs xfs_statfs_t;
typedef struct vfs_sync_work {
struct list_head w_list;
struct vfs *w_vfs;
void *w_data; /* syncer routine argument */
void (*w_syncer)(struct vfs *, void *);
} vfs_sync_work_t;
typedef struct vfs {
u_int vfs_flag; /* flags */
xfs_fsid_t vfs_fsid; /* file system ID */
xfs_fsid_t *vfs_altfsid; /* An ID fixed for life of FS */
bhv_head_t vfs_bh; /* head of vfs behavior chain */
struct super_block *vfs_super; /* generic superblock pointer */
struct task_struct *vfs_sync_task; /* generalised sync thread */
vfs_sync_work_t vfs_sync_work; /* work item for VFS_SYNC */
struct list_head vfs_sync_list; /* sync thread work item list */
spinlock_t vfs_sync_lock; /* work item list lock */
int vfs_sync_seq; /* sync thread generation no. */
wait_queue_head_t vfs_wait_single_sync_task;
wait_queue_head_t vfs_wait_sync_task;
} vfs_t;
#define vfs_fbhv vfs_bh.bh_first /* 1st on vfs behavior chain */
#define bhvtovfs(bdp) ( (struct vfs *)BHV_VOBJ(bdp) )
#define bhvtovfsops(bdp) ( (struct vfsops *)BHV_OPS(bdp) )
#define VFS_BHVHEAD(vfs) ( &(vfs)->vfs_bh )
#define VFS_REMOVEBHV(vfs, bdp) ( bhv_remove(VFS_BHVHEAD(vfs), bdp) )
#define VFS_POSITION_BASE BHV_POSITION_BASE /* chain bottom */
#define VFS_POSITION_TOP BHV_POSITION_TOP /* chain top */
#define VFS_POSITION_INVALID BHV_POSITION_INVALID /* invalid pos. num */
typedef enum {
VFS_BHV_UNKNOWN, /* not specified */
VFS_BHV_XFS, /* xfs */
VFS_BHV_DM, /* data migration */
VFS_BHV_QM, /* quota manager */
VFS_BHV_IO, /* IO path */
VFS_BHV_END /* housekeeping end-of-range */
} vfs_bhv_t;
#define VFS_POSITION_XFS (BHV_POSITION_BASE)
#define VFS_POSITION_DM (VFS_POSITION_BASE+10)
#define VFS_POSITION_QM (VFS_POSITION_BASE+20)
#define VFS_POSITION_IO (VFS_POSITION_BASE+30)
#define VFS_RDONLY 0x0001 /* read-only vfs */
#define VFS_GRPID 0x0002 /* group-ID assigned from directory */
#define VFS_DMI 0x0004 /* filesystem has the DMI enabled */
#define VFS_UMOUNT 0x0008 /* unmount in progress */
#define VFS_END 0x0008 /* max flag */
#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_QUIESCE 0x0100 /* quiesce fileystem for a snapshot */
typedef int (*vfs_mount_t)(bhv_desc_t *,
struct xfs_mount_args *, struct cred *);
typedef int (*vfs_parseargs_t)(bhv_desc_t *, char *,
struct xfs_mount_args *, int);
typedef int (*vfs_showargs_t)(bhv_desc_t *, struct seq_file *);
typedef int (*vfs_unmount_t)(bhv_desc_t *, int, struct cred *);
typedef int (*vfs_mntupdate_t)(bhv_desc_t *, int *,
struct xfs_mount_args *);
typedef int (*vfs_root_t)(bhv_desc_t *, struct vnode **);
typedef int (*vfs_statvfs_t)(bhv_desc_t *, xfs_statfs_t *, struct vnode *);
typedef int (*vfs_sync_t)(bhv_desc_t *, int, struct cred *);
typedef int (*vfs_vget_t)(bhv_desc_t *, struct vnode **, struct fid *);
typedef int (*vfs_dmapiops_t)(bhv_desc_t *, caddr_t);
typedef int (*vfs_quotactl_t)(bhv_desc_t *, int, int, caddr_t);
typedef void (*vfs_init_vnode_t)(bhv_desc_t *,
struct vnode *, bhv_desc_t *, int);
typedef void (*vfs_force_shutdown_t)(bhv_desc_t *, int, char *, int);
typedef void (*vfs_freeze_t)(bhv_desc_t *);
typedef struct vfsops {
bhv_position_t vf_position; /* behavior chain position */
vfs_mount_t vfs_mount; /* mount file system */
vfs_parseargs_t vfs_parseargs; /* parse mount options */
vfs_showargs_t vfs_showargs; /* unparse mount options */
vfs_unmount_t vfs_unmount; /* unmount file system */
vfs_mntupdate_t vfs_mntupdate; /* update file system options */
vfs_root_t vfs_root; /* get root vnode */
vfs_statvfs_t vfs_statvfs; /* file system statistics */
vfs_sync_t vfs_sync; /* flush files */
vfs_vget_t vfs_vget; /* get vnode from fid */
vfs_dmapiops_t vfs_dmapiops; /* data migration */
vfs_quotactl_t vfs_quotactl; /* disk quota */
vfs_init_vnode_t vfs_init_vnode; /* initialize a new vnode */
vfs_force_shutdown_t vfs_force_shutdown; /* crash and burn */
vfs_freeze_t vfs_freeze; /* freeze fs for snapshot */
} vfsops_t;
/*
* VFS's. Operates on vfs structure pointers (starts at bhv head).
*/
#define VHEAD(v) ((v)->vfs_fbhv)
#define VFS_MOUNT(v, ma,cr, rv) ((rv) = vfs_mount(VHEAD(v), ma,cr))
#define VFS_PARSEARGS(v, o,ma,f, rv) ((rv) = vfs_parseargs(VHEAD(v), o,ma,f))
#define VFS_SHOWARGS(v, m, rv) ((rv) = vfs_showargs(VHEAD(v), m))
#define VFS_UNMOUNT(v, f, cr, rv) ((rv) = vfs_unmount(VHEAD(v), f,cr))
#define VFS_MNTUPDATE(v, fl, args, rv) ((rv) = vfs_mntupdate(VHEAD(v), fl, args))
#define VFS_ROOT(v, vpp, rv) ((rv) = vfs_root(VHEAD(v), vpp))
#define VFS_STATVFS(v, sp,vp, rv) ((rv) = vfs_statvfs(VHEAD(v), sp,vp))
#define VFS_SYNC(v, flag,cr, rv) ((rv) = vfs_sync(VHEAD(v), flag,cr))
#define VFS_VGET(v, vpp,fidp, rv) ((rv) = vfs_vget(VHEAD(v), vpp,fidp))
#define VFS_DMAPIOPS(v, p, rv) ((rv) = vfs_dmapiops(VHEAD(v), p))
#define VFS_QUOTACTL(v, c,id,p, rv) ((rv) = vfs_quotactl(VHEAD(v), c,id,p))
#define VFS_INIT_VNODE(v, vp,b,ul) ( vfs_init_vnode(VHEAD(v), vp,b,ul) )
#define VFS_FORCE_SHUTDOWN(v, fl,f,l) ( vfs_force_shutdown(VHEAD(v), fl,f,l) )
#define VFS_FREEZE(v) ( vfs_freeze(VHEAD(v)) )
/*
* PVFS's. Operates on behavior descriptor pointers.
*/
#define PVFS_MOUNT(b, ma,cr, rv) ((rv) = vfs_mount(b, ma,cr))
#define PVFS_PARSEARGS(b, o,ma,f, rv) ((rv) = vfs_parseargs(b, o,ma,f))
#define PVFS_SHOWARGS(b, m, rv) ((rv) = vfs_showargs(b, m))
#define PVFS_UNMOUNT(b, f,cr, rv) ((rv) = vfs_unmount(b, f,cr))
#define PVFS_MNTUPDATE(b, fl, args, rv) ((rv) = vfs_mntupdate(b, fl, args))
#define PVFS_ROOT(b, vpp, rv) ((rv) = vfs_root(b, vpp))
#define PVFS_STATVFS(b, sp,vp, rv) ((rv) = vfs_statvfs(b, sp,vp))
#define PVFS_SYNC(b, flag,cr, rv) ((rv) = vfs_sync(b, flag,cr))
#define PVFS_VGET(b, vpp,fidp, rv) ((rv) = vfs_vget(b, vpp,fidp))
#define PVFS_DMAPIOPS(b, p, rv) ((rv) = vfs_dmapiops(b, p))
#define PVFS_QUOTACTL(b, c,id,p, rv) ((rv) = vfs_quotactl(b, c,id,p))
#define PVFS_INIT_VNODE(b, vp,b2,ul) ( vfs_init_vnode(b, vp,b2,ul) )
#define PVFS_FORCE_SHUTDOWN(b, fl,f,l) ( vfs_force_shutdown(b, fl,f,l) )
#define PVFS_FREEZE(b) ( vfs_freeze(b) )
extern int vfs_mount(bhv_desc_t *, struct xfs_mount_args *, struct cred *);
extern int vfs_parseargs(bhv_desc_t *, char *, struct xfs_mount_args *, int);
extern int vfs_showargs(bhv_desc_t *, struct seq_file *);
extern int vfs_unmount(bhv_desc_t *, int, struct cred *);
extern int vfs_mntupdate(bhv_desc_t *, int *, struct xfs_mount_args *);
extern int vfs_root(bhv_desc_t *, struct vnode **);
extern int vfs_statvfs(bhv_desc_t *, xfs_statfs_t *, struct vnode *);
extern int vfs_sync(bhv_desc_t *, int, struct cred *);
extern int vfs_vget(bhv_desc_t *, struct vnode **, struct fid *);
extern int vfs_dmapiops(bhv_desc_t *, caddr_t);
extern int vfs_quotactl(bhv_desc_t *, int, int, caddr_t);
extern void vfs_init_vnode(bhv_desc_t *, struct vnode *, bhv_desc_t *, int);
extern void vfs_force_shutdown(bhv_desc_t *, int, char *, int);
extern void vfs_freeze(bhv_desc_t *);
typedef struct bhv_vfsops {
struct vfsops bhv_common;
void * bhv_custom;
} bhv_vfsops_t;
#define vfs_bhv_lookup(v, id) ( bhv_lookup_range(&(v)->vfs_bh, (id), (id)) )
#define vfs_bhv_custom(b) ( ((bhv_vfsops_t *)BHV_OPS(b))->bhv_custom )
#define vfs_bhv_set_custom(b,o) ( (b)->bhv_custom = (void *)(o))
#define vfs_bhv_clr_custom(b) ( (b)->bhv_custom = NULL )
extern vfs_t *vfs_allocate(void);
extern void vfs_deallocate(vfs_t *);
extern void vfs_insertops(vfs_t *, bhv_vfsops_t *);
extern void vfs_insertbhv(vfs_t *, bhv_desc_t *, vfsops_t *, void *);
extern void bhv_insert_all_vfsops(struct vfs *);
extern void bhv_remove_all_vfsops(struct vfs *, int);
extern void bhv_remove_vfsops(struct vfs *, int);
#define fs_frozen(vfsp) ((vfsp)->vfs_super->s_frozen)
#define fs_check_frozen(vfsp, level) \
vfs_check_frozen(vfsp->vfs_super, level);
#endif /* __XFS_VFS_H__ */
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