FreeBSD/Linux Kernel Cross Reference
sys/sys/vnode.h

     /*
      * Copyright (c) 1989, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)vnode.h     8.7 (Berkeley) 2/4/94
     * $FreeBSD: releng/5.1/sys/sys/vnode.h 114061 2003-04-26 08:36:06Z alc $
     */
    
    #ifndef _SYS_VNODE_H_
    #define _SYS_VNODE_H_
    
    /*
     * XXX - compatability until lockmgr() goes away or all the #includes are
     * updated.
     */
    #include <sys/lockmgr.h>
    
    #include <sys/queue.h>
    #include <sys/_label.h>
    #include <sys/_lock.h>
    #include <sys/lock.h>
    #include <sys/_mutex.h>
    #include <sys/mutex.h>
    #include <sys/selinfo.h>
    #include <sys/uio.h>
    #include <sys/acl.h>
    #include <sys/ktr.h>
    
    /*
     * The vnode is the focus of all file activity in UNIX.  There is a
     * unique vnode allocated for each active file, each current directory,
     * each mounted-on file, text file, and the root.
     */
    
    /*
     * Vnode types.  VNON means no type.
     */
    enum vtype      { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD };
    
    /*
     * Each underlying filesystem allocates its own private area and hangs
     * it from v_data.  If non-null, this area is freed in getnewvnode().
     */
    TAILQ_HEAD(buflists, buf);
    
    typedef int     vop_t(void *);
    struct namecache;
    
    struct vpollinfo {
            struct  mtx vpi_lock;           /* lock to protect below */
            struct  selinfo vpi_selinfo;    /* identity of poller(s) */
            short   vpi_events;             /* what they are looking for */
            short   vpi_revents;            /* what has happened */
    };
    
    /*
     * Reading or writing any of these items requires holding the appropriate lock.
     *
     * Lock reference:
     *      c - namecache mutex
     *      f - freelist mutex
     *      i - interlock
     *      m - mntvnodes mutex
     *      p - pollinfo lock
     *      s - spechash mutex
     *      S - syncer mutex
     *      u - Only a reference to the vnode is needed to read.
     *      v - vnode lock
     *
     * XXX Not all fields are locked yet and some fields that are marked are not
     * locked consistently.  This is a work in progress.
    */
   
   struct vnode {
           struct  mtx v_interlock;                /* lock for "i" things */
           u_long  v_iflag;                        /* i vnode flags (see below) */
           int     v_usecount;                     /* i ref count of users */
           long    v_numoutput;                    /* i writes in progress */
           struct thread *v_vxproc;                /* i thread owning VXLOCK */
           int     v_holdcnt;                      /* i page & buffer references */
           struct  buflists v_cleanblkhd;          /* i SORTED clean blocklist */
           struct buf      *v_cleanblkroot;        /* i clean buf splay tree  */
           int     v_cleanbufcnt;                  /* i number of clean buffers */
           struct  buflists v_dirtyblkhd;          /* i SORTED dirty blocklist */
           struct buf      *v_dirtyblkroot;        /* i dirty buf splay tree */
           int     v_dirtybufcnt;                  /* i number of dirty buffers */
           u_long  v_vflag;                        /* v vnode flags */
           int     v_writecount;                   /* v ref count of writers */
           struct vm_object *v_object;             /* v Place to store VM object */
           daddr_t v_lastw;                        /* v last write (write cluster) */
           daddr_t v_cstart;                       /* v start block of cluster */
           daddr_t v_lasta;                        /* v last allocation (cluster) */
           int     v_clen;                         /* v length of current cluster */
           union {
                   struct mount    *vu_mountedhere;/* v ptr to mounted vfs (VDIR) */
                   struct socket   *vu_socket;     /* v unix ipc (VSOCK) */
                   struct {
                           struct cdev     *vu_cdev; /* v device (VCHR, VBLK) */
                           SLIST_ENTRY(vnode) vu_specnext; /* s device aliases */
                   } vu_spec;
                   struct fifoinfo *vu_fifoinfo;   /* v fifo (VFIFO) */
           } v_un;
           TAILQ_ENTRY(vnode) v_freelist;          /* f vnode freelist */
           TAILQ_ENTRY(vnode) v_nmntvnodes;        /* m vnodes for mount point */
           LIST_ENTRY(vnode) v_synclist;           /* S dirty vnode list */
           enum    vtype v_type;                   /* u vnode type */
           const char *v_tag;                      /* u type of underlying data */
           void    *v_data;                        /* u private data for fs */
           struct  lock v_lock;                    /* u used if fs don't have one */
           struct  lock *v_vnlock;                 /* u pointer to vnode lock */
           vop_t   **v_op;                         /* u vnode operations vector */
           struct  mount *v_mount;                 /* u ptr to vfs we are in */
           LIST_HEAD(, namecache) v_cache_src;     /* c Cache entries from us */
           TAILQ_HEAD(, namecache) v_cache_dst;    /* c Cache entries to us */
           u_long  v_id;                           /* c capability identifier */
           struct  vnode *v_dd;                    /* c .. vnode */
           u_long  v_ddid;                         /* c .. capability identifier */
           struct vpollinfo *v_pollinfo;           /* p Poll events */
           struct label v_label;                   /* MAC label for vnode */
   #ifdef  DEBUG_LOCKS
           const char *filename;                   /* Source file doing locking */
           int line;                               /* Line number doing locking */
   #endif
           udev_t  v_cachedfs;                     /* cached fs id */
           ino_t   v_cachedid;                     /* cached file id */
   };
   #define v_mountedhere   v_un.vu_mountedhere
   #define v_socket        v_un.vu_socket
   #define v_rdev          v_un.vu_spec.vu_cdev
   #define v_specnext      v_un.vu_spec.vu_specnext
   #define v_fifoinfo      v_un.vu_fifoinfo
   
   /*
    * Userland version of struct vnode, for sysctl.
    */
   struct xvnode {
           size_t  xv_size;                        /* sizeof(struct xvnode) */
           void    *xv_vnode;                      /* address of real vnode */
           u_long  xv_flag;                        /* vnode vflags */
           int     xv_usecount;                    /* reference count of users */
           int     xv_writecount;                  /* reference count of writers */
           int     xv_holdcnt;                     /* page & buffer references */
           u_long  xv_id;                          /* capability identifier */
           void    *xv_mount;                      /* address of parent mount */
           long    xv_numoutput;                   /* num of writes in progress */
           enum    vtype xv_type;                  /* vnode type */
           union {
                   void    *xvu_socket;            /* socket, if VSOCK */
                   void    *xvu_fifo;              /* fifo, if VFIFO */
                   udev_t  xvu_rdev;               /* maj/min, if VBLK/VCHR */
                   struct {
                           udev_t  xvu_dev;        /* device, if VDIR/VREG/VLNK */
                           ino_t   xvu_ino;        /* id, if VDIR/VREG/VLNK */
                   } xv_uns;
           } xv_un;
   };
   #define xv_socket       xv_un.xvu_socket
   #define xv_fifo         xv_un.xvu_fifo
   #define xv_rdev         xv_un.xvu_rdev
   #define xv_dev          xv_un.xv_uns.xvu_dev
   #define xv_ino          xv_un.xv_uns.xvu_ino
   
   #define VN_POLLEVENT(vp, events)                                \
           do {                                                    \
                   if ((vp)->v_pollinfo != NULL &&                 \
                       (vp)->v_pollinfo->vpi_events & (events))    \
                           vn_pollevent((vp), (events));           \
           } while (0)
   
   #define VN_KNOTE(vp, b)                                         \
           do {                                                    \
                   if ((vp)->v_pollinfo != NULL)                   \
                           KNOTE(&vp->v_pollinfo->vpi_selinfo.si_note, (b)); \
           } while (0)
   
   /*
    * Vnode flags.
    *      VI flags are protected by interlock and live in v_iflag
    *      VV flags are protected by the vnode lock and live in v_vflag
    */
   #define VI_XLOCK        0x0001  /* vnode is locked to change vtype */
   #define VI_XWANT        0x0002  /* thread is waiting for vnode */
   #define VI_BWAIT        0x0004  /* waiting for output to complete */
   #define VI_OLOCK        0x0008  /* vnode is locked waiting for an object */
   #define VI_OWANT        0x0010  /* a thread is waiting for VOLOCK */
   #define VI_MOUNT        0x0020  /* Mount in progress */
   #define VI_AGE          0x0040  /* Insert vnode at head of free list */
   #define VI_DOOMED       0x0080  /* This vnode is being recycled */
   #define VI_FREE         0x0100  /* This vnode is on the freelist */
   #define VI_OBJDIRTY     0x0400  /* object might be dirty */
   #define VI_DOINGINACT   0x0800  /* VOP_INACTIVE is in progress */
   /*
    * XXX VI_ONWORKLST could be replaced with a check for NULL list elements
    * in v_synclist.
    */
   #define VI_ONWORKLST    0x0200  /* On syncer work-list */
   
   #define VV_ROOT         0x0001  /* root of its filesystem */
   #define VV_ISTTY        0x0002  /* vnode represents a tty */
   #define VV_NOSYNC       0x0004  /* unlinked, stop syncing */
   #define VV_OBJBUF       0x0008  /* Allocate buffers in VM object */
   #define VV_CACHEDLABEL  0x0010  /* Vnode has valid cached MAC label */
   #define VV_TEXT         0x0020  /* vnode is a pure text prototype */
   #define VV_COPYONWRITE  0x0040  /* vnode is doing copy-on-write */
   #define VV_SYSTEM       0x0080  /* vnode being used by kernel */
   #define VV_PROCDEP      0x0100  /* vnode is process dependent */
   
   /*
    * Vnode attributes.  A field value of VNOVAL represents a field whose value
    * is unavailable (getattr) or which is not to be changed (setattr).
    */
   struct vattr {
           enum vtype      va_type;        /* vnode type (for create) */
           u_short         va_mode;        /* files access mode and type */
           short           va_nlink;       /* number of references to file */
           uid_t           va_uid;         /* owner user id */
           gid_t           va_gid;         /* owner group id */
           udev_t          va_fsid;        /* filesystem id */
           long            va_fileid;      /* file id */
           u_quad_t        va_size;        /* file size in bytes */
           long            va_blocksize;   /* blocksize preferred for i/o */
           struct timespec va_atime;       /* time of last access */
           struct timespec va_mtime;       /* time of last modification */
           struct timespec va_ctime;       /* time file changed */
           struct timespec va_birthtime;   /* time file created */
           u_long          va_gen;         /* generation number of file */
           u_long          va_flags;       /* flags defined for file */
           udev_t          va_rdev;        /* device the special file represents */
           u_quad_t        va_bytes;       /* bytes of disk space held by file */
           u_quad_t        va_filerev;     /* file modification number */
           u_int           va_vaflags;     /* operations flags, see below */
           long            va_spare;       /* remain quad aligned */
   };
   
   /*
    * Flags for va_vaflags.
    */
   #define VA_UTIMES_NULL  0x01            /* utimes argument was NULL */
   #define VA_EXCLUSIVE    0x02            /* exclusive create request */
   
   /*
    * Flags for ioflag. (high 16 bits used to ask for read-ahead and
    * help with write clustering)
    */
   #define IO_UNIT         0x0001          /* do I/O as atomic unit */
   #define IO_APPEND       0x0002          /* append write to end */
   #define IO_SYNC         0x0004          /* do I/O synchronously */
   #define IO_NODELOCKED   0x0008          /* underlying node already locked */
   #define IO_NDELAY       0x0010          /* FNDELAY flag set in file table */
   #define IO_VMIO         0x0020          /* data already in VMIO space */
   #define IO_INVAL        0x0040          /* invalidate after I/O */
   #define IO_ASYNC        0x0080          /* bawrite rather then bdwrite */
   #define IO_DIRECT       0x0100          /* attempt to bypass buffer cache */
   #define IO_NOWDRAIN     0x0200          /* do not block on wdrain */
   #define IO_EXT          0x0400          /* operate on external attributes */
   #define IO_NORMAL       0x0800          /* operate on regular data */
   #define IO_NOMACCHECK   0x1000          /* MAC checks unnecessary */
   
   #define IO_SEQMAX       0x7F            /* seq heuristic max value */
   #define IO_SEQSHIFT     16              /* seq heuristic in upper 16 bits */
   
   /*
    *  Modes.  Some values same as Ixxx entries from inode.h for now.
    */
   #define VEXEC   000100          /* execute/search permission */
   #define VWRITE  000200          /* write permission */
   #define VREAD   000400          /* read permission */
   #define VSVTX   001000          /* save swapped text even after use */
   #define VSGID   002000          /* set group id on execution */
   #define VSUID   004000          /* set user id on execution */
   #define VADMIN  010000          /* permission to administer */
   #define VSTAT   020000          /* permission to retrieve attrs */
   #define VAPPEND 040000          /* permission to write/append */
   #define VALLPERM        (VEXEC | VWRITE | VREAD | VADMIN | VSTAT | VAPPEND)
   
   /*
    * Token indicating no attribute value yet assigned.
    */
   #define VNOVAL  (-1)
   
   /*
    * LK_TIMELOCK timeout for vnode locks (used mainly by the pageout daemon)
    */
   #define VLKTIMEOUT      (hz / 20 + 1)
   
   #ifdef _KERNEL
   
   #ifdef MALLOC_DECLARE
   MALLOC_DECLARE(M_VNODE);
   #endif
   
   /*
    * Convert between vnode types and inode formats (since POSIX.1
    * defines mode word of stat structure in terms of inode formats).
    */
   extern enum vtype       iftovt_tab[];
   extern int              vttoif_tab[];
   #define IFTOVT(mode)    (iftovt_tab[((mode) & S_IFMT) >> 12])
   #define VTTOIF(indx)    (vttoif_tab[(int)(indx)])
   #define MAKEIMODE(indx, mode)   (int)(VTTOIF(indx) | (mode))
   
   /*
    * Flags to various vnode functions.
    */
   #define SKIPSYSTEM      0x0001  /* vflush: skip vnodes marked VSYSTEM */
   #define FORCECLOSE      0x0002  /* vflush: force file closure */
   #define WRITECLOSE      0x0004  /* vflush: only close writable files */
   #define DOCLOSE         0x0008  /* vclean: close active files */
   #define V_SAVE          0x0001  /* vinvalbuf: sync file first */
   #define V_ALT           0x0002  /* vinvalbuf: invalidate only alternate bufs */
   #define V_NORMAL        0x0004  /* vinvalbuf: invalidate only regular bufs */
   #define REVOKEALL       0x0001  /* vop_revoke: revoke all aliases */
   #define V_WAIT          0x0001  /* vn_start_write: sleep for suspend */
   #define V_NOWAIT        0x0002  /* vn_start_write: don't sleep for suspend */
   #define V_XSLEEP        0x0004  /* vn_start_write: just return after sleep */
   
   #define VREF(vp)        vref(vp)
   
   
   #ifdef DIAGNOSTIC
   #define VATTR_NULL(vap) vattr_null(vap)
   #else
   #define VATTR_NULL(vap) (*(vap) = va_null)      /* initialize a vattr */
   #endif /* DIAGNOSTIC */
   
   #define NULLVP  ((struct vnode *)NULL)
   
   #define VNODEOP_SET(f) \
           C_SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_add_vnodeops, &f); \
           C_SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND, vfs_rm_vnodeops, &f);
   
   /*
    * Global vnode data.
    */
   extern  struct vnode *rootvnode;        /* root (i.e. "/") vnode */
   extern  int async_io_version;           /* 0 or POSIX version of AIO i'face */
   extern  int desiredvnodes;              /* number of vnodes desired */
   extern  struct uma_zone *namei_zone;
   extern  int prtactive;                  /* nonzero to call vprint() */
   extern  struct vattr va_null;           /* predefined null vattr structure */
   
   /*
    * Macro/function to check for client cache inconsistency w.r.t. leasing.
    */
   #define LEASE_READ      0x1             /* Check lease for readers */
   #define LEASE_WRITE     0x2             /* Check lease for modifiers */
   
   
   extern void     (*lease_updatetime)(int deltat);
   
   /* Requires interlock */
   #define VSHOULDFREE(vp) \
           (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_DOINGINACT)) && \
            !(vp)->v_holdcnt && !(vp)->v_usecount && \
            (!(vp)->v_object || \
             !((vp)->v_object->ref_count || (vp)->v_object->resident_page_count)))
   
   /* Requires interlock */
   #define VMIGHTFREE(vp) \
           (!((vp)->v_iflag & (VI_FREE|VI_DOOMED|VI_XLOCK|VI_DOINGINACT)) && \
            LIST_EMPTY(&(vp)->v_cache_src) && !(vp)->v_usecount)
   
   /* Requires interlock */
   #define VSHOULDBUSY(vp) \
           (((vp)->v_iflag & VI_FREE) && \
            ((vp)->v_holdcnt || (vp)->v_usecount))
   
   #define VI_LOCK(vp)     mtx_lock(&(vp)->v_interlock)
   #define VI_TRYLOCK(vp)  mtx_trylock(&(vp)->v_interlock)
   #define VI_UNLOCK(vp)   mtx_unlock(&(vp)->v_interlock)
   #define VI_MTX(vp)      (&(vp)->v_interlock)
   
   #endif /* _KERNEL */
   
   
   /*
    * Mods for extensibility.
    */
   
   /*
    * Flags for vdesc_flags:
    */
   #define VDESC_MAX_VPS           16
   /* Low order 16 flag bits are reserved for willrele flags for vp arguments. */
   #define VDESC_VP0_WILLRELE      0x0001
   #define VDESC_VP1_WILLRELE      0x0002
   #define VDESC_VP2_WILLRELE      0x0004
   #define VDESC_VP3_WILLRELE      0x0008
   #define VDESC_NOMAP_VPP         0x0100
   #define VDESC_VPP_WILLRELE      0x0200
   
   /*
    * VDESC_NO_OFFSET is used to identify the end of the offset list
    * and in places where no such field exists.
    */
   #define VDESC_NO_OFFSET -1
   
   /*
    * This structure describes the vnode operation taking place.
    */
   struct vnodeop_desc {
           int      vdesc_offset;          /* offset in vector,first for speed */
           char    *vdesc_name;            /* a readable name for debugging */
           int      vdesc_flags;           /* VDESC_* flags */
   
           /*
            * These ops are used by bypass routines to map and locate arguments.
            * Creds and procs are not needed in bypass routines, but sometimes
            * they are useful to (for example) transport layers.
            * Nameidata is useful because it has a cred in it.
            */
           int     *vdesc_vp_offsets;      /* list ended by VDESC_NO_OFFSET */
           int     vdesc_vpp_offset;       /* return vpp location */
           int     vdesc_cred_offset;      /* cred location, if any */
           int     vdesc_thread_offset;    /* thread location, if any */
           int     vdesc_componentname_offset; /* if any */
           /*
            * Finally, we've got a list of private data (about each operation)
            * for each transport layer.  (Support to manage this list is not
            * yet part of BSD.)
            */
           caddr_t *vdesc_transports;
   };
   
   #ifdef _KERNEL
   /*
    * A list of all the operation descs.
    */
   extern struct vnodeop_desc *vnodeop_descs[];
   
   /*
    * Interlock for scanning list of vnodes attached to a mountpoint
    */
   extern struct mtx mntvnode_mtx;
   
   /*
    * This macro is very helpful in defining those offsets in the vdesc struct.
    *
    * This is stolen from X11R4.  I ignored all the fancy stuff for
    * Crays, so if you decide to port this to such a serious machine,
    * you might want to consult Intrinsic.h's XtOffset{,Of,To}.
    */
   #define VOPARG_OFFSET(p_type,field) \
           ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))
   #define VOPARG_OFFSETOF(s_type,field) \
           VOPARG_OFFSET(s_type*,field)
   #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \
           ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET)))
   
   
   /*
    * This structure is used to configure the new vnodeops vector.
    */
   struct vnodeopv_entry_desc {
           struct vnodeop_desc *opve_op;   /* which operation this is */
           vop_t *opve_impl;               /* code implementing this operation */
   };
   struct vnodeopv_desc {
                           /* ptr to the ptr to the vector where op should go */
           vop_t ***opv_desc_vector_p;
           struct vnodeopv_entry_desc *opv_desc_ops;   /* null terminated list */
   };
   
   /*
    * A generic structure.
    * This can be used by bypass routines to identify generic arguments.
    */
   struct vop_generic_args {
           struct vnodeop_desc *a_desc;
           /* other random data follows, presumably */
   };
   
   /*
    * Support code to aid in debugging VFS locking problems.  Not totally
    * reliable since if the thread sleeps between changing the lock
    * state and checking it with the assert, some other thread could
    * change the state.  They are good enough for debugging a single
    * filesystem using a single-threaded test.
    */
   void assert_vi_locked(struct vnode *vp, char *str);
   void assert_vi_unlocked(struct vnode *vp, char *str);
   void assert_vop_unlocked(struct vnode *vp, char *str);
   void assert_vop_locked(struct vnode *vp, char *str);
   void assert_vop_slocked(struct vnode *vp, char *str);
   void assert_vop_elocked(struct vnode *vp, char *str);
   void assert_vop_elocked_other(struct vnode *vp, char *str);
   
   /* These are called from within the actuall VOPS */
   void vop_rename_pre(void *a);
   void vop_strategy_pre(void *a);
   void vop_lookup_pre(void *a);
   void vop_lookup_post(void *a, int rc);
   void vop_lock_pre(void *a);
   void vop_lock_post(void *a, int rc);
   void vop_unlock_pre(void *a);
   void vop_unlock_post(void *a, int rc);
   
   #ifdef DEBUG_VFS_LOCKS
   
   #define ASSERT_VI_LOCKED(vp, str)       assert_vi_locked((vp), (str))
   #define ASSERT_VI_UNLOCKED(vp, str)     assert_vi_unlocked((vp), (str))
   #define ASSERT_VOP_LOCKED(vp, str)      assert_vop_locked((vp), (str))
   #define ASSERT_VOP_UNLOCKED(vp, str)    assert_vop_unlocked((vp), (str))
   #define ASSERT_VOP_ELOCKED(vp, str)     assert_vop_elocked((vp), (str))
   #define ASSERT_VOP_ELOCKED_OTHER(vp, str) assert_vop_locked_other((vp), (str))
   #define ASSERT_VOP_SLOCKED(vp, str)     assert_vop_slocked((vp), (str))
   
   #else
   
   #define ASSERT_VOP_LOCKED(vp, str)
   #define ASSERT_VOP_UNLOCKED(vp, str)
   #define ASSERT_VOP_ELOCKED(vp, str)
   #define ASSERT_VOP_ELOCKED_OTHER(vp, str)
   #define ASSERT_VOP_SLOCKED(vp, str)
   #define ASSERT_VI_UNLOCKED(vp, str)
   #define ASSERT_VI_LOCKED(vp, str)
   
   #endif
   
   /*
    * VOCALL calls an op given an ops vector.  We break it out because BSD's
    * vclean changes the ops vector and then wants to call ops with the old
    * vector.
    */
   #define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP))
   
   /*
    * This call works for vnodes in the kernel.
    */
   #define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP))
   #define VDESC(OP) (& __CONCAT(OP,_desc))
   #define VOFFSET(OP) (VDESC(OP)->vdesc_offset)
   
   /*
    * VMIO support inline
    */
   
   extern int vmiodirenable;
   
   static __inline int
   vn_canvmio(struct vnode *vp)
   {
         if (vp && (vp->v_type == VREG || (vmiodirenable && vp->v_type == VDIR)))
                   return(TRUE);
           return(FALSE);
   }
   
   /*
    * Finally, include the default set of vnode operations.
    */
   #include "vnode_if.h"
   
   /*
    * Public vnode manipulation functions.
    */
   struct componentname;
   struct file;
   struct mount;
   struct nameidata;
   struct ostat;
   struct thread;
   struct proc;
   struct stat;
   struct nstat;
   struct ucred;
   struct uio;
   struct vattr;
   struct vnode;
   
   extern int      (*lease_check_hook)(struct vop_lease_args *);
   extern int      (*softdep_fsync_hook)(struct vnode *);
   extern int      (*softdep_process_worklist_hook)(struct mount *);
   
   struct  vnode *addaliasu(struct vnode *vp, udev_t nvp_rdev);
   int     bdevvp(dev_t dev, struct vnode **vpp);
   /* cache_* may belong in namei.h. */
   void    cache_enter(struct vnode *dvp, struct vnode *vp,
               struct componentname *cnp);
   int     cache_lookup(struct vnode *dvp, struct vnode **vpp,
               struct componentname *cnp);
   void    cache_purge(struct vnode *vp);
   void    cache_purgevfs(struct mount *mp);
   int     cache_leaf_test(struct vnode *vp);
   int     change_dir(struct vnode *vp, struct thread *td);
   int     change_root(struct vnode *vp, struct thread *td);
   void    cvtstat(struct stat *st, struct ostat *ost);
   void    cvtnstat(struct stat *sb, struct nstat *nsb);
   int     getnewvnode(const char *tag, struct mount *mp, vop_t **vops,
               struct vnode **vpp);
   int     lease_check(struct vop_lease_args *ap);
   int     spec_vnoperate(struct vop_generic_args *);
   int     speedup_syncer(void);
   #define textvp_fullpath(p, rb, rfb) \
           vn_fullpath(FIRST_THREAD_IN_PROC(p), (p)->p_textvp, rb, rfb)
   int     vn_fullpath(struct thread *td, struct vnode *vn,
               char **retbuf, char **freebuf);
   int     vaccess(enum vtype type, mode_t file_mode, uid_t uid, gid_t gid,
               mode_t acc_mode, struct ucred *cred, int *privused);
   int     vaccess_acl_posix1e(enum vtype type, uid_t file_uid,
               gid_t file_gid, struct acl *acl, mode_t acc_mode,
               struct ucred *cred, int *privused);
   void    vattr_null(struct vattr *vap);
   int     vcount(struct vnode *vp);
   void    vdrop(struct vnode *);
   void    vdropl(struct vnode *);
   int     vfinddev(dev_t dev, enum vtype type, struct vnode **vpp);
   void    vfs_add_vnodeops(const void *);
   void    vfs_rm_vnodeops(const void *);
   int     vflush(struct mount *mp, int rootrefs, int flags);
   int     vget(struct vnode *vp, int lockflag, struct thread *td);
   void    vgone(struct vnode *vp);
   void    vgonel(struct vnode *vp, struct thread *td);
   void    vhold(struct vnode *);
   void    vholdl(struct vnode *);
   int     vinvalbuf(struct vnode *vp, int save, struct ucred *cred,
               struct thread *td, int slpflag, int slptimeo);
   int     vtruncbuf(struct vnode *vp, struct ucred *cred, struct thread *td,
               off_t length, int blksize);
   void    vprint(char *label, struct vnode *vp);
   int     vrecycle(struct vnode *vp, struct mtx *inter_lkp,
               struct thread *td);
   int     vn_close(struct vnode *vp,
               int flags, struct ucred *file_cred, struct thread *td);
   void    vn_finished_write(struct mount *mp);
   int     vn_isdisk(struct vnode *vp, int *errp);
   int     vn_lock(struct vnode *vp, int flags, struct thread *td);
   #ifdef  DEBUG_LOCKS
   int     debug_vn_lock(struct vnode *vp, int flags, struct thread *p,
               const char *filename, int line);
   #define vn_lock(vp,flags,p) debug_vn_lock(vp,flags,p,__FILE__,__LINE__)
   #endif
   int     vn_open(struct nameidata *ndp, int *flagp, int cmode);
   int     vn_open_cred(struct nameidata *ndp, int *flagp, int cmode,
               struct ucred *cred);
   void    vn_pollevent(struct vnode *vp, int events);
   void    vn_pollgone(struct vnode *vp);
   int     vn_pollrecord(struct vnode *vp, struct thread *p, int events);
   int     vn_rdwr(enum uio_rw rw, struct vnode *vp, caddr_t base,
               int len, off_t offset, enum uio_seg segflg, int ioflg,
               struct ucred *active_cred, struct ucred *file_cred, int *aresid,
               struct thread *td);
   int     vn_rdwr_inchunks(enum uio_rw rw, struct vnode *vp, caddr_t base,
               int len, off_t offset, enum uio_seg segflg, int ioflg,
               struct ucred *active_cred, struct ucred *file_cred, int *aresid,
               struct thread *td);
   int     vn_stat(struct vnode *vp, struct stat *sb, struct ucred *active_cred,
               struct ucred *file_cred, struct thread *td);
   int     vn_start_write(struct vnode *vp, struct mount **mpp, int flags);
   dev_t   vn_todev(struct vnode *vp);
   int     vn_write_suspend_wait(struct vnode *vp, struct mount *mp,
               int flags);
   int     vn_writechk(struct vnode *vp);
   int     vn_extattr_get(struct vnode *vp, int ioflg, int attrnamespace,
               const char *attrname, int *buflen, char *buf, struct thread *td);
   int     vn_extattr_set(struct vnode *vp, int ioflg, int attrnamespace,
               const char *attrname, int buflen, char *buf, struct thread *td);
   int     vn_extattr_rm(struct vnode *vp, int ioflg, int attrnamespace,
               const char *attrname, struct thread *td);
   int     vfs_cache_lookup(struct vop_lookup_args *ap);
   int     vfs_object_create(struct vnode *vp, struct thread *td,
               struct ucred *cred);
   void    vfs_timestamp(struct timespec *);
   void    vfs_write_resume(struct mount *mp);
   int     vfs_write_suspend(struct mount *mp);
   int     vop_stdbmap(struct vop_bmap_args *);
   int     vop_stdfsync(struct vop_fsync_args *);
   int     vop_stdgetwritemount(struct vop_getwritemount_args *);
   int     vop_stdgetpages(struct vop_getpages_args *);
   int     vop_stdinactive(struct vop_inactive_args *);
   int     vop_stdislocked(struct vop_islocked_args *);
   int     vop_stdlock(struct vop_lock_args *);
   int     vop_stdputpages(struct vop_putpages_args *);
   int     vop_stdunlock(struct vop_unlock_args *);
   int     vop_noislocked(struct vop_islocked_args *);
   int     vop_nolock(struct vop_lock_args *);
   int     vop_nopoll(struct vop_poll_args *);
   int     vop_nounlock(struct vop_unlock_args *);
   int     vop_stdpathconf(struct vop_pathconf_args *);
   int     vop_stdpoll(struct vop_poll_args *);
   int     vop_revoke(struct vop_revoke_args *);
   int     vop_sharedlock(struct vop_lock_args *);
   int     vop_eopnotsupp(struct vop_generic_args *ap);
   int     vop_ebadf(struct vop_generic_args *ap);
   int     vop_einval(struct vop_generic_args *ap);
   int     vop_enotty(struct vop_generic_args *ap);
   int     vop_defaultop(struct vop_generic_args *ap);
   int     vop_null(struct vop_generic_args *ap);
   int     vop_panic(struct vop_generic_args *ap);
   int     vop_stdcreatevobject(struct vop_createvobject_args *ap);
   int     vop_stddestroyvobject(struct vop_destroyvobject_args *ap);
   int     vop_stdgetvobject(struct vop_getvobject_args *ap);
   
   void    vfree(struct vnode *);
   void    vput(struct vnode *vp);
   void    vrele(struct vnode *vp);
   void    vref(struct vnode *vp);
   int     vrefcnt(struct vnode *vp);
   void    vbusy(struct vnode *vp);
   void    v_addpollinfo(struct vnode *vp);
   
   extern  vop_t **default_vnodeop_p;
   extern  vop_t **spec_vnodeop_p;
   extern  vop_t **dead_vnodeop_p;
   
   #endif /* _KERNEL */
   
   #endif /* !_SYS_VNODE_H_ */

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