/* * Copyright (c) 2000-2003 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 cred;struct vnode;struct kstatfs;struct seq_file;struct super_block;struct xfs_mount_args;typedef struct kstatfs xfs_statfs_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;	/* Linux superblock structure */	struct task_struct	*vfs_sync_task;	/* xfssyncd process */	int 			vfs_sync_seq;	/* xfssyncd generation number */	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 */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);#endif	/* __XFS_VFS_H__ */