mirror of https://gitee.com/openkylin/linux.git
224 lines
9.5 KiB
C
224 lines
9.5 KiB
C
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/*
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* Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc., 59
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* Temple Place - Suite 330, Boston MA 02111-1307, USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
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*/
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#ifndef __XFS_VFS_H__
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#define __XFS_VFS_H__
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#include <linux/vfs.h>
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#include "xfs_fs.h"
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struct fid;
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struct vfs;
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struct cred;
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struct vnode;
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struct kstatfs;
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struct seq_file;
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struct super_block;
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struct xfs_mount_args;
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typedef struct kstatfs xfs_statfs_t;
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typedef struct vfs_sync_work {
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struct list_head w_list;
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struct vfs *w_vfs;
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void *w_data; /* syncer routine argument */
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void (*w_syncer)(struct vfs *, void *);
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} vfs_sync_work_t;
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typedef struct vfs {
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u_int vfs_flag; /* flags */
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xfs_fsid_t vfs_fsid; /* file system ID */
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xfs_fsid_t *vfs_altfsid; /* An ID fixed for life of FS */
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bhv_head_t vfs_bh; /* head of vfs behavior chain */
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struct super_block *vfs_super; /* generic superblock pointer */
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struct task_struct *vfs_sync_task; /* generalised sync thread */
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vfs_sync_work_t vfs_sync_work; /* work item for VFS_SYNC */
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struct list_head vfs_sync_list; /* sync thread work item list */
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spinlock_t vfs_sync_lock; /* work item list lock */
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int vfs_sync_seq; /* sync thread generation no. */
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wait_queue_head_t vfs_wait_single_sync_task;
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wait_queue_head_t vfs_wait_sync_task;
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} vfs_t;
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#define vfs_fbhv vfs_bh.bh_first /* 1st on vfs behavior chain */
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#define bhvtovfs(bdp) ( (struct vfs *)BHV_VOBJ(bdp) )
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#define bhvtovfsops(bdp) ( (struct vfsops *)BHV_OPS(bdp) )
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#define VFS_BHVHEAD(vfs) ( &(vfs)->vfs_bh )
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#define VFS_REMOVEBHV(vfs, bdp) ( bhv_remove(VFS_BHVHEAD(vfs), bdp) )
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#define VFS_POSITION_BASE BHV_POSITION_BASE /* chain bottom */
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#define VFS_POSITION_TOP BHV_POSITION_TOP /* chain top */
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#define VFS_POSITION_INVALID BHV_POSITION_INVALID /* invalid pos. num */
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typedef enum {
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VFS_BHV_UNKNOWN, /* not specified */
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VFS_BHV_XFS, /* xfs */
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VFS_BHV_DM, /* data migration */
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VFS_BHV_QM, /* quota manager */
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VFS_BHV_IO, /* IO path */
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VFS_BHV_END /* housekeeping end-of-range */
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} vfs_bhv_t;
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#define VFS_POSITION_XFS (BHV_POSITION_BASE)
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#define VFS_POSITION_DM (VFS_POSITION_BASE+10)
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#define VFS_POSITION_QM (VFS_POSITION_BASE+20)
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#define VFS_POSITION_IO (VFS_POSITION_BASE+30)
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#define VFS_RDONLY 0x0001 /* read-only vfs */
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#define VFS_GRPID 0x0002 /* group-ID assigned from directory */
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#define VFS_DMI 0x0004 /* filesystem has the DMI enabled */
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#define VFS_UMOUNT 0x0008 /* unmount in progress */
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#define VFS_END 0x0008 /* max flag */
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#define SYNC_ATTR 0x0001 /* sync attributes */
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#define SYNC_CLOSE 0x0002 /* close file system down */
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#define SYNC_DELWRI 0x0004 /* look at delayed writes */
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#define SYNC_WAIT 0x0008 /* wait for i/o to complete */
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#define SYNC_BDFLUSH 0x0010 /* BDFLUSH is calling -- don't block */
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#define SYNC_FSDATA 0x0020 /* flush fs data (e.g. superblocks) */
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#define SYNC_REFCACHE 0x0040 /* prune some of the nfs ref cache */
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#define SYNC_REMOUNT 0x0080 /* remount readonly, no dummy LRs */
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typedef int (*vfs_mount_t)(bhv_desc_t *,
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struct xfs_mount_args *, struct cred *);
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typedef int (*vfs_parseargs_t)(bhv_desc_t *, char *,
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struct xfs_mount_args *, int);
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typedef int (*vfs_showargs_t)(bhv_desc_t *, struct seq_file *);
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typedef int (*vfs_unmount_t)(bhv_desc_t *, int, struct cred *);
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typedef int (*vfs_mntupdate_t)(bhv_desc_t *, int *,
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struct xfs_mount_args *);
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typedef int (*vfs_root_t)(bhv_desc_t *, struct vnode **);
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typedef int (*vfs_statvfs_t)(bhv_desc_t *, xfs_statfs_t *, struct vnode *);
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typedef int (*vfs_sync_t)(bhv_desc_t *, int, struct cred *);
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typedef int (*vfs_vget_t)(bhv_desc_t *, struct vnode **, struct fid *);
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typedef int (*vfs_dmapiops_t)(bhv_desc_t *, caddr_t);
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typedef int (*vfs_quotactl_t)(bhv_desc_t *, int, int, caddr_t);
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typedef void (*vfs_init_vnode_t)(bhv_desc_t *,
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struct vnode *, bhv_desc_t *, int);
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typedef void (*vfs_force_shutdown_t)(bhv_desc_t *, int, char *, int);
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typedef void (*vfs_freeze_t)(bhv_desc_t *);
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typedef struct vfsops {
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bhv_position_t vf_position; /* behavior chain position */
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vfs_mount_t vfs_mount; /* mount file system */
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vfs_parseargs_t vfs_parseargs; /* parse mount options */
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vfs_showargs_t vfs_showargs; /* unparse mount options */
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vfs_unmount_t vfs_unmount; /* unmount file system */
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vfs_mntupdate_t vfs_mntupdate; /* update file system options */
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vfs_root_t vfs_root; /* get root vnode */
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vfs_statvfs_t vfs_statvfs; /* file system statistics */
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vfs_sync_t vfs_sync; /* flush files */
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vfs_vget_t vfs_vget; /* get vnode from fid */
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vfs_dmapiops_t vfs_dmapiops; /* data migration */
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vfs_quotactl_t vfs_quotactl; /* disk quota */
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vfs_init_vnode_t vfs_init_vnode; /* initialize a new vnode */
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vfs_force_shutdown_t vfs_force_shutdown; /* crash and burn */
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vfs_freeze_t vfs_freeze; /* freeze fs for snapshot */
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} vfsops_t;
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/*
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* VFS's. Operates on vfs structure pointers (starts at bhv head).
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*/
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#define VHEAD(v) ((v)->vfs_fbhv)
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#define VFS_MOUNT(v, ma,cr, rv) ((rv) = vfs_mount(VHEAD(v), ma,cr))
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#define VFS_PARSEARGS(v, o,ma,f, rv) ((rv) = vfs_parseargs(VHEAD(v), o,ma,f))
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#define VFS_SHOWARGS(v, m, rv) ((rv) = vfs_showargs(VHEAD(v), m))
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#define VFS_UNMOUNT(v, f, cr, rv) ((rv) = vfs_unmount(VHEAD(v), f,cr))
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#define VFS_MNTUPDATE(v, fl, args, rv) ((rv) = vfs_mntupdate(VHEAD(v), fl, args))
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#define VFS_ROOT(v, vpp, rv) ((rv) = vfs_root(VHEAD(v), vpp))
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#define VFS_STATVFS(v, sp,vp, rv) ((rv) = vfs_statvfs(VHEAD(v), sp,vp))
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#define VFS_SYNC(v, flag,cr, rv) ((rv) = vfs_sync(VHEAD(v), flag,cr))
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#define VFS_VGET(v, vpp,fidp, rv) ((rv) = vfs_vget(VHEAD(v), vpp,fidp))
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#define VFS_DMAPIOPS(v, p, rv) ((rv) = vfs_dmapiops(VHEAD(v), p))
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#define VFS_QUOTACTL(v, c,id,p, rv) ((rv) = vfs_quotactl(VHEAD(v), c,id,p))
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#define VFS_INIT_VNODE(v, vp,b,ul) ( vfs_init_vnode(VHEAD(v), vp,b,ul) )
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#define VFS_FORCE_SHUTDOWN(v, fl,f,l) ( vfs_force_shutdown(VHEAD(v), fl,f,l) )
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#define VFS_FREEZE(v) ( vfs_freeze(VHEAD(v)) )
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/*
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* PVFS's. Operates on behavior descriptor pointers.
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*/
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#define PVFS_MOUNT(b, ma,cr, rv) ((rv) = vfs_mount(b, ma,cr))
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#define PVFS_PARSEARGS(b, o,ma,f, rv) ((rv) = vfs_parseargs(b, o,ma,f))
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#define PVFS_SHOWARGS(b, m, rv) ((rv) = vfs_showargs(b, m))
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#define PVFS_UNMOUNT(b, f,cr, rv) ((rv) = vfs_unmount(b, f,cr))
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#define PVFS_MNTUPDATE(b, fl, args, rv) ((rv) = vfs_mntupdate(b, fl, args))
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#define PVFS_ROOT(b, vpp, rv) ((rv) = vfs_root(b, vpp))
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#define PVFS_STATVFS(b, sp,vp, rv) ((rv) = vfs_statvfs(b, sp,vp))
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#define PVFS_SYNC(b, flag,cr, rv) ((rv) = vfs_sync(b, flag,cr))
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#define PVFS_VGET(b, vpp,fidp, rv) ((rv) = vfs_vget(b, vpp,fidp))
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#define PVFS_DMAPIOPS(b, p, rv) ((rv) = vfs_dmapiops(b, p))
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#define PVFS_QUOTACTL(b, c,id,p, rv) ((rv) = vfs_quotactl(b, c,id,p))
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#define PVFS_INIT_VNODE(b, vp,b2,ul) ( vfs_init_vnode(b, vp,b2,ul) )
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#define PVFS_FORCE_SHUTDOWN(b, fl,f,l) ( vfs_force_shutdown(b, fl,f,l) )
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#define PVFS_FREEZE(b) ( vfs_freeze(b) )
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extern int vfs_mount(bhv_desc_t *, struct xfs_mount_args *, struct cred *);
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extern int vfs_parseargs(bhv_desc_t *, char *, struct xfs_mount_args *, int);
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extern int vfs_showargs(bhv_desc_t *, struct seq_file *);
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extern int vfs_unmount(bhv_desc_t *, int, struct cred *);
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extern int vfs_mntupdate(bhv_desc_t *, int *, struct xfs_mount_args *);
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extern int vfs_root(bhv_desc_t *, struct vnode **);
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extern int vfs_statvfs(bhv_desc_t *, xfs_statfs_t *, struct vnode *);
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extern int vfs_sync(bhv_desc_t *, int, struct cred *);
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extern int vfs_vget(bhv_desc_t *, struct vnode **, struct fid *);
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extern int vfs_dmapiops(bhv_desc_t *, caddr_t);
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extern int vfs_quotactl(bhv_desc_t *, int, int, caddr_t);
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extern void vfs_init_vnode(bhv_desc_t *, struct vnode *, bhv_desc_t *, int);
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extern void vfs_force_shutdown(bhv_desc_t *, int, char *, int);
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extern void vfs_freeze(bhv_desc_t *);
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typedef struct bhv_vfsops {
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struct vfsops bhv_common;
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void * bhv_custom;
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} bhv_vfsops_t;
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#define vfs_bhv_lookup(v, id) ( bhv_lookup_range(&(v)->vfs_bh, (id), (id)) )
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#define vfs_bhv_custom(b) ( ((bhv_vfsops_t *)BHV_OPS(b))->bhv_custom )
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#define vfs_bhv_set_custom(b,o) ( (b)->bhv_custom = (void *)(o))
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#define vfs_bhv_clr_custom(b) ( (b)->bhv_custom = NULL )
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extern vfs_t *vfs_allocate(void);
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extern void vfs_deallocate(vfs_t *);
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extern void vfs_insertops(vfs_t *, bhv_vfsops_t *);
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extern void vfs_insertbhv(vfs_t *, bhv_desc_t *, vfsops_t *, void *);
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extern void bhv_insert_all_vfsops(struct vfs *);
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extern void bhv_remove_all_vfsops(struct vfs *, int);
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extern void bhv_remove_vfsops(struct vfs *, int);
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#define fs_frozen(vfsp) ((vfsp)->vfs_super->s_frozen)
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#define fs_check_frozen(vfsp, level) \
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vfs_check_frozen(vfsp->vfs_super, level);
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#endif /* __XFS_VFS_H__ */
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