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/*

 * 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 statfs;

struct seq_file;

struct super_block;

struct xfs_mount_args;

typedef struct statfs 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;

        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 IGET_NOALLOC            0x0001  /* vfs_get_inode may return NULL */

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 struct inode * (*vfs_get_inode_t)(bhv_desc_t *, xfs_ino_t, int);

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_get_inode_t         vfs_get_inode;  /* bhv specific iget */

        vfs_init_vnode_t        vfs_init_vnode; /* initialize a new vnode */

        vfs_force_shutdown_t    vfs_force_shutdown;     /* crash and burn */

} 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_GET_INODE(v, ino, fl)       ( vfs_get_inode(VHEAD(v), ino,fl) )

#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) )

/*

 * 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_GET_INODE(b, ino,fl)       ( vfs_get_inode(b, ino,fl) )

#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) )

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 struct inode *vfs_get_inode(bhv_desc_t *, xfs_ino_t, int);

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);

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__ */