/*
* Copyright (c) 2000 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_VNODE_H__
#define __XFS_VNODE_H__
#include <linux/vnode.h>
#define ISVDEV(t) \
((t) == VCHR || (t) == VBLK || (t) == VFIFO || (t) == VSOCK)
/*
* Conversion between vnode types/modes and encoded type/mode as
* seen by stat(2) and mknod(2).
*/
extern enum vtype iftovt_tab[];
extern ushort vttoif_tab[];
#define IFTOVT(M) (iftovt_tab[((M) & S_IFMT) >> 12])
#define VTTOIF(T) (vttoif_tab[(int)(T)])
#define MAKEIMODE
/* XXXnathans MAKEIMODE looks dodgey - should be...? */
/* #define MAKEIMODE(type,mode) (mode) - for Linux? */
/*
* One file structure is allocated for each call to open/creat/pipe.
* Mainly used to hold the read/write pointer associated with each
* open file.
* vf_lock protects:
* vf_flag
*/
typedef struct vfile {
lock_t vf_lock; /* spinlock for vf_flag */
int vf_flag;
void *__vf_data__; /* DON'T ACCESS DIRECTLY */
} vfile_t;
#define VF_TO_VNODE(vfp) \
(ASSERT(!((vfp)->vf_flag & FSOCKET)), (vnode_t *)(vfp)->__vf_data__)
#define VF_IS_VNODE(vfp) (!((vfp)->vf_flag & FSOCKET))
/*
* Vnode flags.
*
* The vnode flags fall into two categories:
* 1) Local only -
* Flags that are relevant only to a particular cell
* 2) Single system image -
* Flags that must be maintained coherent across all cells
*/
/* Local only flags */
#define VINACT 0x2 /* vnode is being inactivated */
#define VRECLM 0x4 /* vnode is being reclaimed */
#define VLOCK 0x0 /* no bit on Linux */
#define VWAIT 0x20 /* waiting for VINACT
or VRECLM to finish */
#define VGONE 0x80 /* vnode isn't really here */
#define VREMAPPING 0x100 /* file data flush/inval in progress */
#define VMOUNTING 0x200 /* mount in progress on vnode */
#define VLOCKHOLD 0x400 /* VN_HOLD for remote locks */
#define VINACTIVE_TEARDOWN 0x2000 /* vnode torn down at inactive time */
#define VSEMAPHORE 0x4000 /* vnode ::= a Posix named semaphore */
#define VUSYNC 0x8000 /* vnode aspace ::= usync objects */
/* Single system image flags */
#define VROOT 0x100000 /* root of its file system */
#define VNOSWAP 0x200000 /* cannot be used as virt swap device */
#define VISSWAP 0x400000 /* vnode is part of virt swap device */
#define VREPLICABLE 0x800000 /* Vnode can have replicated pages */
#define VNONREPLICABLE 0x1000000 /* Vnode has writers. Don't replicate */
#define VDOCMP 0x2000000 /* Vnode has special VOP_CMP impl. */
#define VSHARE 0x4000000 /* vnode part of global cache */
/* VSHARE applies to local cell only */
#define VFRLOCKS 0x8000000 /* vnode has FR locks applied */
#define VENF_LOCKING 0x10000000 /* enf. mode FR locking in effect */
#define VOPLOCK 0x20000000 /* oplock set on the vnode */
#define VPURGE 0x40000000 /* In the linux 'put' thread */
typedef enum vrwlock { VRWLOCK_NONE, VRWLOCK_READ,
VRWLOCK_WRITE, VRWLOCK_WRITE_DIRECT } vrwlock_t;
/*
* flags for vn_create/VOP_CREATE/vn_open
*/
#define VEXCL 0x0001
#define VZFS 0x0002 /* caller has a 0 RLIMIT_FSIZE */
/*
* FROM_VN_KILL is a special 'kill' flag to VOP_CLOSE to signify a call
* from vn_kill. This is passed as the lastclose field
*/
typedef enum { L_FALSE, L_TRUE, FROM_VN_KILL } lastclose_t;
/*
* Return values for VOP_INACTIVE. A return value of
* VN_INACTIVE_NOCACHE implies that the file system behavior
* has disassociated its state and bhv_desc_t from the vnode.
* To return VN_INACTIVE_NOCACHE, the vnode must have the
* VINACTIVE_TEARDOWN flag set.
*/
#define VN_INACTIVE_CACHE 0
#define VN_INACTIVE_NOCACHE 1
/*
* Values for the cmd code given to VOP_VNODE_CHANGE.
*/
typedef enum vchange {
VCHANGE_FLAGS_FRLOCKS = 0,
VCHANGE_FLAGS_ENF_LOCKING = 1,
VCHANGE_FLAGS_TRUNCATED = 2,
VCHANGE_FLAGS_PAGE_DIRTY = 3,
VCHANGE_FLAGS_IOEXCL_COUNT = 4
} vchange_t;
/*
* Macros for dealing with the behavior descriptor inside of the vnode.
*/
#define BHV_TO_VNODE(bdp) ((vnode_t *)BHV_VOBJ(bdp))
#define BHV_TO_VNODE_NULL(bdp) ((vnode_t *)BHV_VOBJNULL(bdp))
#define VNODE_TO_FIRST_BHV(vp) (BHV_HEAD_FIRST(&(vp)->v_bh))
#define VN_BHV_HEAD(vp) ((vn_bhv_head_t *)(&((vp)->v_bh)))
#define VN_BHV_READ_LOCK(bhp) BHV_READ_LOCK(bhp)
#define VN_BHV_READ_UNLOCK(bhp) BHV_READ_UNLOCK(bhp)
#define VN_BHV_WRITE_LOCK(bhp) BHV_WRITE_LOCK(bhp)
#define VN_BHV_NOT_READ_LOCKED(bhp) BHV_NOT_READ_LOCKED(bhp)
#define VN_BHV_NOT_WRITE_LOCKED(bhp) BHV_NOT_WRITE_LOCKED(bhp)
#define vn_bhv_head_init(bhp,name) bhv_head_init(bhp,name)
#define vn_bhv_head_reinit(bhp) bhv_head_reinit(bhp)
#define vn_bhv_insert_initial(bhp,bdp) bhv_insert_initial(bhp,bdp)
#define vn_bhv_remove(bhp,bdp) bhv_remove(bhp,bdp)
#define vn_bhv_lookup(bhp,ops) bhv_lookup(bhp,ops)
#define vn_bhv_lookup_unlocked(bhp,ops) bhv_lookup_unlocked(bhp,ops)
#define v_fbhv v_bh.bh_first /* first behavior */
#define v_fops v_bh.bh_first->bd_ops /* ops for first behavior */
struct cred;
struct vfs;
struct uio;
struct buf;
struct vattr;
struct pathname;
struct bmapval;
union rval;
struct attrlist_cursor_kern;
struct file;
struct page_buf_bmap_s;
typedef int (*vop_bmap_t)(bhv_desc_t *, loff_t, ssize_t, int, struct page_buf_bmap_s *, int *);
typedef ssize_t (*vop_read_t)(bhv_desc_t *, struct file *, char *,
size_t, loff_t *);
typedef ssize_t (*vop_write_t)(bhv_desc_t *, struct file *, const char *,
size_t, loff_t *);
typedef int (*vop_open_t)(bhv_desc_t *, vnode_t **, mode_t, struct cred *);
typedef int (*vop_close_t)(bhv_desc_t *, int, lastclose_t, struct cred *);
typedef int (*vop_getattr_t)(bhv_desc_t *, struct vattr *, int,
struct cred *);
typedef int (*vop_setattr_t)(bhv_desc_t *, struct vattr *, int,
struct cred *);
typedef int (*vop_access_t)(bhv_desc_t *, int, struct cred *);
typedef int (*vop_lookup_t)(bhv_desc_t *, char *, vnode_t **,
struct pathname *, int, vnode_t *,
struct cred *);
typedef int (*vop_create_t)(bhv_desc_t *, char *, struct vattr *, int, int,
vnode_t **, struct cred *);
typedef int (*vop_remove_t)(bhv_desc_t *, vnode_t *, char *, struct cred *);
typedef int (*vop_link_t)(bhv_desc_t *, vnode_t *, char *, struct cred *);
typedef int (*vop_rename_t)(bhv_desc_t *, char *, vnode_t *, char *,
struct pathname *npnp, struct cred *);
typedef int (*vop_mkdir_t)(bhv_desc_t *, char *, struct vattr *, vnode_t **,
struct cred *);
typedef int (*vop_rmdir_t)(bhv_desc_t *, vnode_t *, char *, vnode_t *, struct cred *);
typedef int (*vop_readdir_t)(bhv_desc_t *, struct uio *, struct cred *,
int *);
typedef int (*vop_symlink_t)(bhv_desc_t *, char *, struct vattr *, char *,
vnode_t **, struct cred *);
typedef int (*vop_readlink_t)(bhv_desc_t *, struct uio *, struct cred *);
typedef int (*vop_fsync_t)(bhv_desc_t *, int, struct cred *, xfs_off_t, xfs_off_t);
typedef int (*vop_inactive_t)(bhv_desc_t *, struct cred *);
typedef int (*vop_fid2_t)(bhv_desc_t *, struct fid *);
typedef int (*vop_release_t)(bhv_desc_t *);
typedef void (*vop_rwlock_t)(bhv_desc_t *, vrwlock_t);
typedef void (*vop_rwunlock_t)(bhv_desc_t *, vrwlock_t);
typedef int (*vop_seek_t)(bhv_desc_t *, xfs_off_t, xfs_off_t*);
typedef int (*vop_realvp_t)(bhv_desc_t *, vnode_t **);
typedef int (*vop_fcntl_t)(bhv_desc_t *, int, void *, int, xfs_off_t,
struct cred *, union rval *);
typedef int (*vop_reclaim_t)(bhv_desc_t *, int);
typedef int (*vop_attr_get_t)(bhv_desc_t *, char *, char *, int *, int,
struct cred *);
typedef int (*vop_attr_set_t)(bhv_desc_t *, char *, char *, int, int,
struct cred *);
typedef int (*vop_attr_remove_t)(bhv_desc_t *, char *, int, struct cred *);
typedef int (*vop_attr_list_t)(bhv_desc_t *, char *, int, int,
struct attrlist_cursor_kern *, struct cred *);
typedef void (*vop_link_removed_t)(bhv_desc_t *, vnode_t *, int);
typedef void (*vop_vnode_change_t)(bhv_desc_t *, vchange_t, __psint_t);
typedef void (*vop_ptossvp_t)(bhv_desc_t *, xfs_off_t, int);
typedef void (*vop_pflushinvalvp_t)(bhv_desc_t *, xfs_off_t, int);
typedef int (*vop_pflushvp_t)(bhv_desc_t *, xfs_off_t, uint64_t, int);
typedef void (*vop_sethole_t)(bhv_desc_t *, void *, int, int, xfs_off_t);
typedef int (*vop_ioctl_t)(bhv_desc_t *, struct inode *, struct file *, unsigned int, unsigned long);
typedef struct vnodeops {
vop_open_t vop_open;
vop_close_t vop_close;
vop_read_t vop_read;
vop_write_t vop_write;
vop_getattr_t vop_getattr;
vop_setattr_t vop_setattr;
vop_access_t vop_access;
vop_lookup_t vop_lookup;
vop_create_t vop_create;
vop_remove_t vop_remove;
vop_link_t vop_link;
vop_rename_t vop_rename;
vop_mkdir_t vop_mkdir;
vop_rmdir_t vop_rmdir;
vop_readdir_t vop_readdir;
vop_symlink_t vop_symlink;
vop_readlink_t vop_readlink;
vop_fsync_t vop_fsync;
vop_inactive_t vop_inactive;
vop_fid2_t vop_fid2;
vop_release_t vop_release;
vop_rwlock_t vop_rwlock;
vop_rwunlock_t vop_rwunlock;
vop_seek_t vop_seek;
vop_realvp_t vop_realvp;
vop_bmap_t vop_bmap;
vop_fcntl_t vop_fcntl;
vop_reclaim_t vop_reclaim;
vop_attr_get_t vop_attr_get;
vop_attr_set_t vop_attr_set;
vop_attr_remove_t vop_attr_remove;
vop_attr_list_t vop_attr_list;
vop_link_removed_t vop_link_removed;
vop_vnode_change_t vop_vnode_change;
vop_ptossvp_t vop_tosspages;
vop_pflushinvalvp_t vop_flushinval_pages;
vop_pflushvp_t vop_flush_pages;
vop_sethole_t vop_pages_sethole;
vop_ioctl_t vop_ioctl;
} vnodeops_t;
/*
* VOP's.
*/
#define _VOP_(op, vp) (*((vnodeops_t *)(vp)->v_fops)->op)
/*
* Be careful with VOP_OPEN, since we're holding the chain lock on the
* original vnode and VOP_OPEN semantic allows the new vnode to be returned
* in vpp. The practice of passing &vp for vpp just doesn't work.
*/
#define VOP_READ(vp,filp,buf,size,offset,rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_read, vp)((vp)->v_fbhv,filp,buf,size,offset); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_WRITE(vp,filp,buf,size,offset,rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_write, vp)((vp)->v_fbhv,filp,buf,size,offset); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_BMAP(vp,of,sz,rw,b,n,rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_bmap, vp)((vp)->v_fbhv,of,sz,rw,b,n); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_OPEN(vp, vpp, mode, cr, rv) \
{ \
ASSERT(&(vp) != vpp); \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_open, vp)((vp)->v_fbhv, vpp, mode, cr); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_CLOSE(vp,f,c,cr,rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_close, vp)((vp)->v_fbhv,f,c,cr); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_GETATTR(vp, vap, f, cr, rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_getattr, vp)((vp)->v_fbhv, vap, f, cr); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_SETATTR(vp, vap, f, cr, rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_setattr, vp)((vp)->v_fbhv, vap, f, cr); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_ACCESS(vp, mode, cr, rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_access, vp)((vp)->v_fbhv, mode, cr); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_LOOKUP(vp,cp,vpp,pnp,f,rdir,cr,rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_lookup, vp)((vp)->v_fbhv,cp,vpp,pnp,f,rdir,cr); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_CREATE(dvp,p,vap,ex,mode,vpp,cr,rv) \
{ \
VN_BHV_READ_LOCK(&(dvp)->v_bh); \
rv = _VOP_(vop_create, dvp)((dvp)->v_fbhv,p,vap,ex,mode,vpp,cr);\
VN_BHV_READ_UNLOCK(&(dvp)->v_bh); \
}
#define VOP_REMOVE(dvp,vp,p,cr,rv) \
{ \
VN_BHV_READ_LOCK(&(dvp)->v_bh); \
rv = _VOP_(vop_remove, dvp)((dvp)->v_fbhv,vp,p,cr); \
VN_BHV_READ_UNLOCK(&(dvp)->v_bh); \
}
#define VOP_LINK(tdvp,fvp,p,cr,rv) \
{ \
VN_BHV_READ_LOCK(&(tdvp)->v_bh); \
rv = _VOP_(vop_link, tdvp)((tdvp)->v_fbhv,fvp,p,cr); \
VN_BHV_READ_UNLOCK(&(tdvp)->v_bh); \
}
#define VOP_RENAME(fvp,fnm,tdvp,tnm,tpnp,cr,rv) \
{ \
VN_BHV_READ_LOCK(&(fvp)->v_bh); \
rv = _VOP_(vop_rename, fvp)((fvp)->v_fbhv,fnm,tdvp,tnm,tpnp,cr);\
VN_BHV_READ_UNLOCK(&(fvp)->v_bh); \
}
#define VOP_MKDIR(dp,p,vap,vpp,cr,rv) \
{ \
VN_BHV_READ_LOCK(&(dp)->v_bh); \
rv = _VOP_(vop_mkdir, dp)((dp)->v_fbhv,p,vap,vpp,cr); \
VN_BHV_READ_UNLOCK(&(dp)->v_bh); \
}
#define VOP_RMDIR(dp,vp,p,cdir,cr,rv) \
{ \
VN_BHV_READ_LOCK(&(dp)->v_bh); \
rv = _VOP_(vop_rmdir, dp)((dp)->v_fbhv,vp,p,cdir,cr); \
VN_BHV_READ_UNLOCK(&(dp)->v_bh); \
}
#define VOP_READDIR(vp,uiop,cr,eofp,rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_readdir, vp)((vp)->v_fbhv,uiop,cr,eofp); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_SYMLINK(dvp,lnm,vap,tnm,vpp,cr,rv) \
{ \
VN_BHV_READ_LOCK(&(dvp)->v_bh); \
rv = _VOP_(vop_symlink, dvp) ((dvp)->v_fbhv,lnm,vap,tnm,vpp,cr); \
VN_BHV_READ_UNLOCK(&(dvp)->v_bh); \
}
#define VOP_READLINK(vp,uiop,cr,rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_readlink, vp)((vp)->v_fbhv,uiop,cr); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_FSYNC(vp,f,cr,b,e,rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_fsync, vp)((vp)->v_fbhv,f,cr,b,e); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_INACTIVE(vp, cr, rv) \
{ /* vnode not reference-able, so no need to lock chain */ \
rv = _VOP_(vop_inactive, vp)((vp)->v_fbhv, cr); \
}
#define VOP_RELEASE(vp, rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_release, vp)((vp)->v_fbhv); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_FID2(vp, fidp, rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_fid2, vp)((vp)->v_fbhv, fidp); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_RWLOCK(vp,i) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
(void)_VOP_(vop_rwlock, vp)((vp)->v_fbhv, i); \
/* "allow" is done by rwunlock */ \
}
#define VOP_RWUNLOCK(vp,i) \
{ /* "prevent" was done by rwlock */ \
(void)_VOP_(vop_rwunlock, vp)((vp)->v_fbhv, i); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_SEEK(vp, ooff, noffp, rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_seek, vp)((vp)->v_fbhv, ooff, noffp); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_REALVP(vp1, vp2, rv) \
{ \
VN_BHV_READ_LOCK(&(vp1)->v_bh); \
rv = _VOP_(vop_realvp, vp1)((vp1)->v_fbhv, vp2); \
VN_BHV_READ_UNLOCK(&(vp1)->v_bh); \
}
#define VOP_FCNTL(vp,cmd,a,f,of,cr,rvp,rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_fcntl, vp)((vp)->v_fbhv,cmd,a,f,of,cr,rvp); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_RECLAIM(vp, flag, rv) \
{ /* vnode not reference-able, so no need to lock chain */ \
ASSERT(!((vp)->v_flag & VINACTIVE_TEARDOWN)); \
rv = _VOP_(vop_reclaim, vp)((vp)->v_fbhv, flag); \
}
#define VOP_ATTR_GET(vp, name, val, vallenp, fl, cred, rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_attr_get, vp)((vp)->v_fbhv,name,val,vallenp,fl,cred); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_ATTR_SET(vp, name, val, vallen, fl, cred, rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_attr_set, vp)((vp)->v_fbhv,name,val,vallen,fl,cred); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_ATTR_REMOVE(vp, name, flags, cred, rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_attr_remove, vp)((vp)->v_fbhv,name,flags,cred); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_ATTR_LIST(vp, buf, buflen, fl, cursor, cred, rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_attr_list, vp)((vp)->v_fbhv,buf,buflen,fl,cursor,cred);\
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_LINK_REMOVED(vp, dvp, linkzero) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
(void)_VOP_(vop_link_removed, vp)((vp)->v_fbhv, dvp, linkzero); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_VNODE_CHANGE(vp, cmd, val) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
(void)_VOP_(vop_vnode_change, vp)((vp)->v_fbhv,cmd,val); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
/*
* These are page cache functions that now go thru VOPs.
*/
#define VOP_TOSS_PAGES(vp, first, fiopt) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
_VOP_(vop_tosspages, vp)((vp)->v_fbhv,first,fiopt); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_FLUSHINVAL_PAGES(vp, first, fiopt) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
_VOP_(vop_flushinval_pages, vp)((vp)->v_fbhv,first,fiopt); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_FLUSH_PAGES(vp, first, flags, fiopt, rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_flush_pages, vp)((vp)->v_fbhv,first,flags,fiopt);\
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_PAGES_SETHOLE(vp, pfd, cnt, doremap, remapoffset) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
_VOP_(vop_pages_sethole, vp)((vp)->v_fbhv,pfd,cnt,doremap,remapoffset);\
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define VOP_IOCTL(vp, inode, filp, cmd, arg, rv) \
{ \
VN_BHV_READ_LOCK(&(vp)->v_bh); \
rv = _VOP_(vop_ioctl, vp)((vp)->v_fbhv,inode,filp,cmd,arg); \
VN_BHV_READ_UNLOCK(&(vp)->v_bh); \
}
#define IO_APPEND 0x00001 /* append write (VOP_WRITE) */
#define IO_SYNC 0x00002 /* sync file I/O (VOP_WRITE) */
#define IO_DIRECT 0x00004 /* bypass page cache */
#define IO_IGNCACHE 0x00008 /* ignore page cache coherency when doing i/o
(IO_DIRECT) */
#define IO_GRIO 0x00010 /* this is a guaranteed rate request */
#define IO_INVIS 0x00020 /* don't update inode timestamps */
#define IO_DSYNC 0x00040 /* sync data I/O (VOP_WRITE) */
#define IO_RSYNC 0x00080 /* sync data I/O (VOP_READ) */
#define IO_NFS 0x00100 /* I/O from the NFS v2 server */
#define IO_TRUSTEDDIO 0x00200 /* direct I/O from a trusted client
so block zeroing is unnecessary */
#define IO_PRIORITY 0x00400 /* I/O is priority */
#define IO_ISLOCKED 0x00800 /* for VOP_READ/WRITE, VOP_RWLOCK/RWUNLOCK is
being done by higher layer - file system
shouldn't do locking */
#define IO_BULK 0x01000 /* loosen semantics for sequential bandwidth */
#define IO_NFS3 0x02000 /* I/O from the NFS v3 server */
#define IO_UIOSZ 0x04000 /* respect i/o size flags in uio struct */
#define IO_ONEPAGE 0x08000 /* I/O must be fit into one page */
#define IO_MTTHREAD 0x10000 /* I/O coming from threaded application, only
used by paging to indicate that fs can
return EAGAIN if this would deadlock. */
/*
* Flush/Invalidate options for VOP_TOSS_PAGES, VOP_FLUSHINVAL_PAGES and
* VOP_FLUSH_PAGES.
*/
#define FI_NONE 0 /* none */
#define FI_REMAPF 1 /* Do a remapf prior to the operation */
#define FI_REMAPF_LOCKED 2 /* Do a remapf prior to the operation.
Prevent VM access to the pages until
the operation completes. */
/*
* Vnode attributes. va_mask indicates those attributes the caller
* wants to set (setattr) or extract (getattr).
*/
typedef struct vattr {
int va_mask; /* bit-mask of attributes */
vtype_t va_type; /* vnode type (for create) */
mode_t va_mode; /* file access mode */
uid_t va_uid; /* owner user id */
gid_t va_gid; /* owner group id */
dev_t va_fsid; /* file system id (dev for now) */
xfs_ino_t va_nodeid; /* node id */
nlink_t va_nlink; /* number of references to file */
xfs_off_t va_size; /* file size in bytes */
timespec_t va_atime; /* time of last access */
timespec_t va_mtime; /* time of last modification */
timespec_t va_ctime; /* time file ``created'' */
dev_t va_rdev; /* device the file represents */
u_long va_blksize; /* fundamental block size */
__int64_t va_nblocks; /* # of blocks allocated */
u_long va_vcode; /* version code */
u_long va_xflags; /* random extended file flags */
u_long va_extsize; /* file extent size */
u_long va_nextents; /* number of extents in file */
u_long va_anextents; /* number of attr extents in file */
int va_projid; /* project id */
u_int va_gencount; /* object generation count */
} vattr_t;
/*
* setattr or getattr attributes
*/
#define AT_TYPE 0x00000001
#define AT_MODE 0x00000002
#define AT_UID 0x00000004
#define AT_GID 0x00000008
#define AT_FSID 0x00000010
#define AT_NODEID 0x00000020
#define AT_NLINK 0x00000040
#define AT_SIZE 0x00000080
#define AT_ATIME 0x00000100
#define AT_MTIME 0x00000200
#define AT_CTIME 0x00000400
#define AT_RDEV 0x00000800
#define AT_BLKSIZE 0x00001000
#define AT_NBLOCKS 0x00002000
#define AT_VCODE 0x00004000
#define AT_MAC 0x00008000
#define AT_UPDATIME 0x00010000
#define AT_UPDMTIME 0x00020000
#define AT_UPDCTIME 0x00040000
#define AT_ACL 0x00080000
#define AT_CAP 0x00100000
#define AT_INF 0x00200000
#define AT_XFLAGS 0x00400000
#define AT_EXTSIZE 0x00800000
#define AT_NEXTENTS 0x01000000
#define AT_ANEXTENTS 0x02000000
#define AT_PROJID 0x04000000
#define AT_SIZE_NOPERM 0x08000000
#define AT_GENCOUNT 0x10000000
#define AT_STAT (AT_TYPE|AT_MODE|AT_UID|AT_GID|AT_FSID|AT_NODEID|AT_NLINK|\
AT_SIZE|AT_ATIME|AT_MTIME|AT_CTIME|AT_RDEV|AT_BLKSIZE|\
AT_NBLOCKS|AT_PROJID)
#define AT_UPDTIMES (AT_UPDATIME|AT_UPDMTIME|AT_UPDCTIME)
#define AT_NOSET (AT_NLINK|AT_RDEV|AT_FSID|AT_NODEID|AT_TYPE|\
AT_BLKSIZE|AT_NBLOCKS|AT_VCODE|AT_NEXTENTS|AT_ANEXTENTS|\
AT_GENCOUNT)
#define VSGID 02000 /* set group id on execution */
#define VEXEC 00100
#define MODEMASK 07777 /* mode bits plus permission bits */
/*
* Check whether mandatory file locking is enabled.
*/
#define MANDLOCK(vp, mode) \
((vp)->v_type == VREG && ((mode) & (VSGID|(VEXEC>>3))) == VSGID)
/*
* This macro determines if a write is actually allowed
* on the node. This macro is used to check if a file's
* access time can be modified.
*/
#define WRITEALLOWED(vp) \
((vp)->v_vfsp && ((vp)->v_vfsp->vfs_flag & VFS_RDONLY) == 0)
/*
* Global vnode allocation:
*
* vp = vn_alloc(vfsp, type, rdev);
* vn_free(vp);
*
* Inactive vnodes are kept on an LRU freelist managed by vn_alloc, vn_free,
* vn_get, vn_purge, and vn_rele. When vn_rele inactivates a vnode,
* it puts the vnode at the end of the list unless there are no behaviors
* attached to it, which tells vn_rele to insert at the beginning of the
* freelist. When vn_get acquires an inactive vnode, it unlinks the vnode
* from the list;
* vn_purge puts inactive dead vnodes at the front of the list for rapid reuse.
*
* If the freelist is empty, vn_alloc dynamically allocates another vnode.
* Call vn_free to destroy a vn_alloc'd vnode that has no other references
* and no valid private data. Do not call vn_free from within VOP_INACTIVE;
* just remove the behaviors and vn_rele will do the right thing.
*
* A vnode might be deallocated after it is put on the freelist (after
* a VOP_RECLAIM, of course). In this case, the vn_epoch value is
* incremented to define a new vnode epoch.
*/
extern void vn_init(void);
extern void vn_free(struct vnode *);
extern vnode_t *vn_address(struct inode *);
extern vnode_t *vn_initialize(struct vfs *, struct inode *, int);
extern vnode_t *vn_alloc(struct vfs *, __uint64_t, enum vtype);
extern void vn_insert_in_linux_hash(struct vnode *);
/*
* Acquiring and invalidating vnodes:
*
* if (vn_get(vp, version, 0))
* ...;
* vn_purge(vp, version);
*
* vn_get and vn_purge must be called with vmap_t arguments, sampled
* while a lock that the vnode's VOP_RECLAIM function acquires is
* held, to ensure that the vnode sampled with the lock held isn't
* recycled (VOP_RECLAIMed) or deallocated between the release of the lock
* and the subsequent vn_get or vn_purge.
*/
/*
* vnode_map structures _must_ match vn_epoch and vnode structure sizes.
*/
typedef struct vnode_map {
vfs_t *v_vfsp;
vnumber_t v_number; /* in-core vnode number */
xfs_ino_t v_ino; /* inode # */
} vmap_t;
#define VMAP(vp, ip, vmap) {(vmap).v_vfsp = (vp)->v_vfsp, \
(vmap).v_number = (vp)->v_number, \
(vmap).v_ino = (ip)->i_ino; }
extern int vn_cached(struct vnode *);
extern int vn_count(struct vnode *);
extern int vn_mapped(struct vnode *);
extern void vn_purge(struct vnode *, vmap_t *);
extern vnode_t *vn_get(struct vnode *, vmap_t *, uint);
extern int vn_revalidate(struct vnode *, int);
extern void vn_remove(struct vnode *);
/*
* Flags for vn_get().
*/
#define VN_GET_NOWAIT 0x1 /* Don't wait for inactive or reclaim */
/*
* Vnode reference counting functions (and macros for compatibility).
*/
extern vnode_t *vn_hold(struct vnode *);
extern void vn_rele(struct vnode *);
extern void vn_put(struct vnode *);
#if defined(CONFIG_XFS_VNODE_TRACING)
#define VN_HOLD(vp) \
((void)vn_hold(vp), \
vn_trace_hold(vp, __FILE__, __LINE__, (inst_t *)__return_address))
#define VN_RELE(vp) \
(vn_trace_rele(vp, __FILE__, __LINE__, (inst_t *)__return_address), \
vn_rele(vp))
#else /* ! (defined(CONFIG_XFS_VNODE_TRACING)) */
#define VN_HOLD(vp) ((void)vn_hold(vp))
#define VN_RELE(vp) (vn_rele(vp))
#endif /* ! (defined(CONFIG_XFS_VNODE_TRACING) */
/*
* Vnode spinlock manipulation.
*/
#define VN_LOCK(vp) mutex_spinlock(&(vp)->v_lock)
#define VN_UNLOCK(vp,s) mutex_spinunlock(&(vp)->v_lock,s)
#define VN_FLAGSET(vp,b) vn_flagset(vp,b)
#define VN_FLAGCLR(vp,b) vn_flagclr(vp,b)
static __inline__ void vn_flagset(struct vnode *vp, uint flag)
{
long flags;
spin_lock_irqsave(&vp->v_lock, flags);
vp->v_flag |= flag;
spin_unlock_irqrestore(&vp->v_lock, flags);
}
static __inline__ void vn_flagclr(struct vnode *vp, uint flag)
{
long flags;
spin_lock_irqsave(&vp->v_lock, flags);
vp->v_flag &= ~flag;
spin_unlock_irqrestore(&vp->v_lock, flags);
}
/*
* Some useful predicates.
*/
#define VN_MAPPED(vp) (vn_mapped(vp))
#define VN_CACHED(vp) (vn_cached(vp))
/*
* Flags to VOP_SETATTR/VOP_GETATTR.
*/
#define ATTR_UTIME 0x01 /* non-default utime(2) request */
#define ATTR_EXEC 0x02 /* invocation from exec(2) */
#define ATTR_COMM 0x04 /* yield common vp attributes */
#define ATTR_DMI 0x08 /* invocation from a DMI function */
#define ATTR_LAZY 0x80 /* set/get attributes lazily */
#define ATTR_NONBLOCK 0x100 /* return EAGAIN if operation would block */
#define ATTR_NOLOCK 0x200 /* Don't grab any conflicting locks */
#define ATTR_NOSIZETOK 0x400 /* Don't get the DVN_SIZE_READ token */
/*
* Flags to VOP_FSYNC and VOP_RECLAIM.
*/
#define FSYNC_NOWAIT 0 /* asynchronous flush */
#define FSYNC_WAIT 0x1 /* synchronous fsync or forced reclaim */
#define FSYNC_INVAL 0x2 /* flush and invalidate cached data */
#define FSYNC_DATA 0x4 /* synchronous fsync of data only */
/*
* Vnode list ops.
*/
#define vn_append(vp,vl) vn_insert(vp, (struct vnlist *)(vl)->vl_prev)
extern void vn_initlist(struct vnlist *);
extern void vn_insert(struct vnode *, struct vnlist *);
extern void vn_unlink(struct vnode *);
#define VNODE_TRACE_SIZE 16 /* number of trace entries */
#if (defined(CONFIG_XFS_VNODE_TRACING))
/*
* Tracing entries.
*/
#define VNODE_KTRACE_ENTRY 1
#define VNODE_KTRACE_EXIT 2
#define VNODE_KTRACE_HOLD 3
#define VNODE_KTRACE_REF 4
#define VNODE_KTRACE_RELE 5
extern void vn_trace_entry(struct vnode *, char *, inst_t *);
extern void vn_trace_exit(struct vnode *, char *, inst_t *);
extern void vn_trace_hold(struct vnode *, char *, int, inst_t *);
extern void vn_trace_ref(struct vnode *, char *, int, inst_t *);
extern void vn_trace_rele(struct vnode *, char *, int, inst_t *);
#define VN_TRACE(vp) \
vn_trace_ref(vp, __FILE__, __LINE__, (inst_t *)__return_address)
#else /* ! (defined(CONFIG_XFS_VNODE_TRACING)) */
#define vn_trace_entry(a,b,c)
#define vn_trace_exit(a,b,c)
#define vn_trace_hold(a,b,c,d)
#define vn_trace_ref(a,b,c,d)
#define vn_trace_rele(a,b,c,d)
#define VN_TRACE(vp)
#endif /* ! (defined(CONFIG_XFS_VNODE_TRACING)) */
#endif /* __XFS_VNODE_H__ */
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