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: src/sys/sys/vnode.h,v 1.111.2.19 2002/12/29 18:19:53 dillon Exp $
     */
    
    #ifndef _SYS_VNODE_H_
    #define _SYS_VNODE_H_
    
    #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
    
    #ifndef _SYS_QUEUE_H_
    #include <sys/queue.h>
    #endif
    #ifndef _SYS_LOCK_H_
    #include <sys/lock.h>
    #endif
    #ifndef _SYS_EVENT_H_
    #include <sys/event.h>
    #endif
    #ifndef _SYS_BIOTRACK_H_
    #include <sys/biotrack.h>
    #endif
    #ifndef _SYS_UIO_H_
    #include <sys/uio.h>
    #endif
    #ifndef _SYS_ACL_H_
    #include <sys/acl.h>
    #endif
    #ifndef _SYS_NAMECACHE_H_
    #include <sys/namecache.h>
    #endif
    #ifndef _SYS_THREAD_H_
    #include <sys/thread.h>
    #endif
    #ifndef _SYS_VFSOPS_H_
    #include <sys/vfsops.h>
    #endif
    #ifndef _SYS_VFSCACHE_H_
    #include <sys/vfscache.h>
    #endif
    #ifndef _SYS_TREE_H_
    #include <sys/tree.h>
    #endif
    #ifndef _SYS_SYSLINK_RPC_H_
    #include <sys/syslink_rpc.h>
    #endif
    #ifndef _SYS_SYSREF_H_
    #include <sys/sysref.h>
    #endif
    #ifndef _MACHINE_LOCK_H_
    #include <machine/lock.h>
    #endif
    
    /*
     * 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.
     */
    
    /*
     * 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);
    
    /*
     * Struct for mount options to printable formats.
     */
   struct mountctl_opt {
           int             o_opt;
           const char      *o_name;
   };
   
   /*
    * The vnode infrastructure is being reorgranized.  Most reference-related
    * fields are locked by the BGL, and most file I/O related operations and
    * vnode teardown functions are locked by the vnode lock.
    *
    * File read operations require a shared lock, file write operations require
    * an exclusive lock.  Most directory operations (read or write) currently
    * require an exclusive lock due to the side effects stored in the directory
    * inode (which we intend to fix).
    *
    * File reads and writes are further protected by a range lock.  The intention
    * is to be able to break I/O operations down into more easily managed pieces
    * so vm_page arrays can be passed through rather then UIOs.  This work will
    * occur in multiple stages.  The range locks will also eventually be used to
    * deal with clustered cache coherency issues and, more immediately, to
    * protect operations associated with the kernel-managed journaling module.
    *
    * NOTE: Certain fields within the vnode structure requires v_token to be
    *       held.  The vnode's normal lock need not be held when accessing
    *       these fields as long as the vnode is deterministically referenced
    *       (i.e. can't be ripped out from under the caller).  This is typical
    *       for code paths based on descriptors or file pointers, but not for
    *       backdoor code paths that come in via the buffer cache.
    *
    *      v_rbclean_tree
    *      v_rbdirty_tree
    *      v_rbhash_tree
    *      v_pollinfo
    *
    * NOTE: The vnode operations vector, v_ops, is a double-indirect that
    *       typically points to &v_mount->mnt_vn_use_ops.  We use a double
    *       pointer because mnt_vn_use_ops may change dynamically when e.g.
    *       journaling is turned on or off.
    *
    * NOTE: v_filesize is currently only applicable when a VM object is
    *       associated with the vnode.  Otherwise it will be set to NOOFFSET.
    *
    * NOTE: The following fields require a spin or token lock.  Note that
    *       additional subsystems may use v_token or v_spin for other
    *       purposes, e.g. vfs/fifofs/fifo_vnops.c
    *
    *       v_namecache    v_spin
    *       v_rb*          v_token
    */
   RB_HEAD(buf_rb_tree, buf);
   RB_HEAD(buf_rb_hash, buf);
   
   struct vnode {
           struct spinlock v_spin;
           int     v_flag;                         /* vnode flags (see below) */
           int     v_writecount;
           int     v_opencount;                    /* number of explicit opens */
           int     v_auxrefs;                      /* auxiliary references */
           int     v_refcnt;
           struct bio_track v_track_read;          /* track I/O's in progress */
           struct bio_track v_track_write;         /* track I/O's in progress */
           struct mount *v_mount;                  /* ptr to vfs we are in */
           struct vop_ops **v_ops;                 /* vnode operations vector */
           TAILQ_ENTRY(vnode) v_list;              /* vnode act/inact/cache/free */
           TAILQ_ENTRY(vnode) v_nmntvnodes;        /* vnodes for mount point */
           LIST_ENTRY(vnode) v_synclist;           /* vnodes with dirty buffers */
           struct buf_rb_tree v_rbclean_tree;      /* RB tree of clean bufs */
           struct buf_rb_tree v_rbdirty_tree;      /* RB tree of dirty bufs */
           struct buf_rb_hash v_rbhash_tree;       /* RB tree general lookup */
           enum    vtype v_type;                   /* vnode type */
           int16_t         v_act;                  /* use heuristic */
           int16_t         v_state;                /* active/free/cached */
           union {
                   struct socket   *vu_socket;     /* unix ipc (VSOCK) */
                   struct {
                           int     vu_umajor;      /* device number for attach */
                           int     vu_uminor;
                           struct cdev     *vu_cdevinfo; /* device (VCHR, VBLK) */
                           SLIST_ENTRY(vnode) vu_cdevnext;
                   } vu_cdev;
                   struct fifoinfo *vu_fifoinfo;   /* fifo (VFIFO) */
           } v_un;
           off_t   v_filesize;                     /* file EOF or NOOFFSET */
           off_t   v_lazyw;                        /* lazy write iterator */
           struct vm_object *v_object;             /* Place to store VM object */
           struct  lock v_lock;                    /* file/dir ops lock */
           struct  lwkt_token v_token;             /* (see above) */
           enum    vtagtype v_tag;                 /* type of underlying data */
           void    *v_data;                        /* private data for fs */
           struct namecache_list v_namecache;      /* (S) associated nc entries */
           struct  {
                   struct  kqinfo vpi_kqinfo;      /* identity of poller(s) */
           } v_pollinfo;
           struct vmresident *v_resident;          /* optional vmresident */
           struct mount *v_pfsmp;                  /* real mp for pfs/nullfs mt */
   #ifdef  DEBUG_LOCKS
           const char *filename;                   /* Source file doing locking */
           int line;                               /* Line number doing locking */
   #endif
   };
   #define v_socket        v_un.vu_socket
   #define v_umajor        v_un.vu_cdev.vu_umajor
   #define v_uminor        v_un.vu_cdev.vu_uminor
   #define v_rdev          v_un.vu_cdev.vu_cdevinfo
   #define v_cdevnext      v_un.vu_cdev.vu_cdevnext
   #define v_fifoinfo      v_un.vu_fifoinfo
   
   /*
    * Vnode flags.
    */
   #define VROOT           0x00000001      /* root of its file system */
   #define VTEXT           0x00000002      /* vnode is a pure text prototype */
   #define VSYSTEM         0x00000004      /* vnode being used by kernel */
   #define VISTTY          0x00000008      /* vnode represents a tty */
   #define VCTTYISOPEN     0x00000010      /* controlling terminal tty is open */
   #define VCKPT           0x00000020      /* checkpoint-restored vnode */
   /* open for business    0x00000040 */
   #define VMAYHAVELOCKS   0x00000080      /* maybe posix or flock locks on vp */
   #define VPFSROOT        0x00000100      /* may be a pseudo filesystem root */
   /* open for business    0x00000200 */
   #define VAGE0           0x00000400      /* Age count for recycling - 2 bits */
   #define VAGE1           0x00000800      /* Age count for recycling - 2 bits */
   /* open for business    0x00001000 */
   #define VOBJBUF         0x00002000      /* Allocate buffers in VM object */
   #define VINACTIVE       0x00004000      /* ran VOP_INACTIVE */
   /* open for business    0x00008000 */
   /* open for business    0x00010000 */
   /* open for business    0x00020000 */
   #define VRECLAIMED      0x00040000      /* This vnode has been destroyed */
   /* open for business    0x00080000 */
   #define VNOTSEEKABLE    0x00100000      /* rd/wr ignores file offset */
   #define VONWORKLST      0x00200000      /* On syncer work-list */
   #define VISDIRTY        0x00400000      /* inode dirty from VFS */
   #define VOBJDIRTY       0x00800000      /* object might be dirty */
   #define VSWAPCACHE      0x01000000      /* enable swapcache */
   /* open for business    0x02000000 */
   /* open for business    0x04000000 */
   
   /*
    * v_state flags (v_state is interlocked by v_spin and vfs_spin)
    */
   #define VS_CACHED       0
   #define VS_ACTIVE       1
   #define VS_INACTIVE     2
   #define VS_DYING        3
   
   /*
    * v_refcnt uses bit 30 to flag that 1->0 transitions require finalization
    * (actual deactivation) and bit 31 to indicate that deactivation is in
    * progress.
    *
    * The VREFCNT() macro returns a negative number if the vnode is undergoing
    * termination (value should not be interpreted beyond being negative),
    * zero if it is cached and has no references, or a positive number
    * indicating the number of refs.
    */
   #define VREF_TERMINATE  0x80000000      /* termination in progress */
   #define VREF_FINALIZE   0x40000000      /* deactivate on last vrele */
   #define VREF_MASK       0xBFFFFFFF      /* includes VREF_TERMINATE */
   
   #define VREFCNT(vp)     ((int)((vp)->v_refcnt & VREF_MASK))
   
   /*
    * vmntvnodescan() flags
    */
   #define VMSC_GETVP      0x01
   #define VMSC_GETVX      0x02
   #define VMSC_NOWAIT     0x10
   #define VMSC_ONEPASS    0x20
   
   /*
    * 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_RECURSE      0x0200          /* possibly device-recursive (vn) */
   #define IO_CORE         0x0400          /* I/O is part of core dump */
   #define IO_NRDELAY      0x0800          /* do not block on disk reads */
   
   #define IO_SEQMAX       0x7F            /* seq heuristic max value */
   #define IO_SEQSHIFT     16              /* seq heuristic in upper 16 bits */
   
   /*
    * Modes.  Note that these V-modes must match file S_I*USR, SUID, SGID,
    * and SVTX flag bits.
    */
   #define VSUID   04000           /* set user id on execution */
   #define VSGID   02000           /* set group id on execution */
   #define VSVTX   01000           /* save swapped text even after use */
   #define VREAD   00400           /* read, write, execute permissions */
   #define VWRITE  00200
   #define VEXEC   00100
   
   /*
    * 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
   
   /*
    * 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 */
   
   #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) \
           SYSINIT(f##init, SI_SUB_VFS, SI_ORDER_SECOND, vfs_nadd_vnodeops_sysinit, &f); \
           SYSUNINIT(f##uninit, SI_SUB_VFS, SI_ORDER_SECOND,vfs_nrm_vnodeops_sysinit, &f);
   
   /*
    * Global vnode data.
    */
   struct objcache;
   
   extern  struct vnode *rootvnode;        /* root (i.e. "/") vnode */
   extern  struct nchandle rootnch;        /* root (i.e. "/") namecache */
   extern  int desiredvnodes;              /* number of vnodes desired */
   extern  time_t syncdelay;               /* max time to delay syncing data */
   extern  time_t filedelay;               /* time to delay syncing files */
   extern  time_t dirdelay;                /* time to delay syncing directories */
   extern  time_t metadelay;               /* time to delay syncing metadata */
   extern  struct objcache *namei_oc;
   extern  int prtactive;                  /* nonzero to call vprint() */
   extern  struct vattr va_null;           /* predefined null vattr structure */
   extern  int numvnodes;
   extern  int inactivevnodes;
   extern  int activevnodes;
   extern  int cachedvnodes;
   
   /*
    * 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)))
   
   typedef int (*vnodeopv_entry_t)(struct vop_generic_args *);
   
   /*
    * 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.
    */
   
   typedef int (*vocall_func_t)(struct vop_generic_args *);
   
   /*
    * This call executes the vops vector for the offset stored in the ap's
    * descriptor of the passed vops rather then the one related to the
    * ap's vop_ops structure.  It is used to chain VOPS calls on behalf of
    * filesystems from a VFS's context ONLY (that is, from a VFS's own vops
    * vector function).
    */
   #define VOCALL(vops, ap)                \
           (*(vocall_func_t *)((char *)(vops)+((ap)->a_desc->sd_offset)))(ap)
   
   #define VDESC(OP) (& __CONCAT(OP,_desc))
   
   /*
    * Public vnode manipulation functions.
    */
   struct file;
   struct mount;
   struct nlookupdata;
   struct proc;
   struct thread;
   struct stat;
   struct ucred;
   struct uio;
   struct vattr;
   struct vnode;
   struct syncer_ctx;
   
   struct vnode *getsynthvnode(const char *devname);
   void    addaliasu (struct vnode *vp, int x, int y);
   int     v_associate_rdev(struct vnode *vp, cdev_t dev);
   void    v_release_rdev(struct vnode *vp);
   int     bdevvp (cdev_t dev, struct vnode **vpp);
   struct vnode *allocvnode(int lktimeout, int lkflags);
   void    allocvnode_gc(void);
   int     freesomevnodes(int count);
   int     getnewvnode (enum vtagtype tag, struct mount *mp, 
                       struct vnode **vpp, int timo, int lkflags);
   int     getspecialvnode (enum vtagtype tag, struct mount *mp, 
                       struct vop_ops **ops, struct vnode **vpp, int timo, 
                       int lkflags);
   void    speedup_syncer (struct mount *mp);
   int     vaccess(enum vtype, mode_t, uid_t, gid_t, mode_t, struct ucred *);
   void    vattr_null (struct vattr *vap);
   int     vcount (struct vnode *vp);
   int     vfinddev (cdev_t dev, enum vtype type, struct vnode **vpp);
   void    vfs_nadd_vnodeops_sysinit (void *);
   void    vfs_nrm_vnodeops_sysinit (void *);
   void    vfs_add_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
   void    vfs_rm_vnodeops(struct mount *, struct vop_ops *, struct vop_ops **);
   int     vflush (struct mount *mp, int rootrefs, int flags);
   
   int     vmntvnodescan(struct mount *mp, int flags,
               int (*fastfunc)(struct mount *mp, struct vnode *vp, void *data),
               int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data),
               void *data);
   int     vsyncscan(struct mount *mp, int flags,
               int (*slowfunc)(struct mount *mp, struct vnode *vp, void *data),
               void *data);
   void    vclrisdirty(struct vnode *vp);
   void    vclrobjdirty(struct vnode *vp);
   void    vsetisdirty(struct vnode *vp);
   void    vsetobjdirty(struct vnode *vp);
   
   void    insmntque(struct vnode *vp, struct mount *mp);
   
   void    vclean_vxlocked (struct vnode *vp, int flags);
   void    vclean_unlocked (struct vnode *vp);
   void    vgone_vxlocked (struct vnode *vp);
   int     vrevoke (struct vnode *vp, struct ucred *cred);
   int     vinvalbuf (struct vnode *vp, int save, int slpflag, int slptimeo);
   int     vtruncbuf (struct vnode *vp, off_t length, int blksize);
   void    vnode_pager_setsize (struct vnode *, vm_ooffset_t);
   int     nvtruncbuf (struct vnode *vp, off_t length, int blksize, int boff,
                   int trivial);
   int     nvextendbuf(struct vnode *vp, off_t olength, off_t nlength,
                   int oblksize, int nblksize,
                   int oboff, int nboff, int trivial);
   void    nvnode_pager_setsize (struct vnode *vp, off_t length,
                   int blksize, int boff);
   int     vfsync(struct vnode *vp, int waitfor, int passes,
                   int (*checkdef)(struct buf *),
                   int (*waitoutput)(struct vnode *, struct thread *));
   int     vinitvmio(struct vnode *vp, off_t filesize, int blksize, int boff);
   void    vprint (char *label, struct vnode *vp);
   int     vrecycle (struct vnode *vp);
   int     vmaxiosize (struct vnode *vp);
   void    vn_strategy(struct vnode *vp, struct bio *bio);
   int     vn_cache_strategy(struct vnode *vp, struct bio *bio);
   int     vn_close (struct vnode *vp, int flags);
   void    vn_gone (struct vnode *vp);
   int     vn_isdisk (struct vnode *vp, int *errp);
   int     vn_islocked (struct vnode *vp);
   int     vn_islocked_unlock (struct vnode *vp);
   void    vn_islocked_relock (struct vnode *vp, int vpls);
   int     vn_lock (struct vnode *vp, int flags);
   void    vn_unlock (struct vnode *vp);
   
   #ifdef  DEBUG_LOCKS
   int     debug_vn_lock (struct vnode *vp, int flags,
                   const char *filename, int line);
   #define vn_lock(vp,flags)       debug_vn_lock(vp, flags, __FILE__, __LINE__)
   #endif
   
   /*#define DEBUG_VN_UNLOCK*/
   #ifdef DEBUG_VN_UNLOCK
   void    debug_vn_unlock (struct vnode *vp,
                   const char *filename, int line);
   #define vn_unlock(vp)           debug_vn_unlock(vp, __FILE__, __LINE__)
   #endif
   
   int     vn_get_namelen(struct vnode *, int *);
   void    vn_setspecops (struct file *fp);
   int     vn_fullpath (struct proc *p, struct vnode *vn, char **retbuf, char **freebuf, int guess);
   int     vn_open (struct nlookupdata *ndp, struct file *fp, int fmode, int cmode);
   int     vn_opendisk (const char *devname, int fmode, struct vnode **vpp);
   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 *cred, int *aresid);
   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 *cred, int *aresid);
   int     vn_stat (struct vnode *vp, struct stat *sb, struct ucred *cred);
   cdev_t  vn_todev (struct vnode *vp);
   void    vfs_timestamp (struct timespec *);
   size_t  vfs_flagstostr(int flags, const struct mountctl_opt *optp, char *buf, size_t len, int *errorp);
   void    vn_mark_atime(struct vnode *vp, struct thread *td);
   int     vn_writechk (struct vnode *vp, struct nchandle *nch);
   int     ncp_writechk(struct nchandle *nch);
   int     vop_stdopen (struct vop_open_args *ap);
   int     vop_stdclose (struct vop_close_args *ap);
   int     vop_stdmountctl(struct vop_mountctl_args *ap);
   int     vop_stdgetpages(struct vop_getpages_args *ap);
   int     vop_stdputpages(struct vop_putpages_args *ap);
   int     vop_stdmarkatime(struct vop_markatime_args *ap);
   int     vop_stdnoread(struct vop_read_args *ap);
   int     vop_stdnowrite(struct vop_write_args *ap);
   int     vop_stdpathconf (struct vop_pathconf_args *ap);
   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_write_dirent(int *, struct uio *, ino_t, uint8_t, uint16_t,
                            const char *);
   
   int     vop_compat_nresolve(struct vop_nresolve_args *ap);
   int     vop_compat_nlookupdotdot(struct vop_nlookupdotdot_args *ap);
   int     vop_compat_ncreate(struct vop_ncreate_args *ap);
   int     vop_compat_nmkdir(struct vop_nmkdir_args *ap);
   int     vop_compat_nmknod(struct vop_nmknod_args *ap);
   int     vop_compat_nlink(struct vop_nlink_args *ap);
   int     vop_compat_nsymlink(struct vop_nsymlink_args *ap);
   int     vop_compat_nwhiteout(struct vop_nwhiteout_args *ap);
   int     vop_compat_nremove(struct vop_nremove_args *ap);
   int     vop_compat_nrmdir(struct vop_nrmdir_args *ap);
   int     vop_compat_nrename(struct vop_nrename_args *ap);
   
   void    vx_lock (struct vnode *vp);
   void    vx_unlock (struct vnode *vp);
   void    vx_get (struct vnode *vp);
   int     vx_get_nonblock (struct vnode *vp);
   void    vx_put (struct vnode *vp);
   int     vget (struct vnode *vp, int lockflag);
   void    vput (struct vnode *vp);
   void    vhold (struct vnode *);
   void    vdrop (struct vnode *);
   void    vref (struct vnode *vp);
   void    vrele (struct vnode *vp);
   void    vsetflags (struct vnode *vp, int flags);
   void    vclrflags (struct vnode *vp, int flags);
   
   /*#define DEBUG_VPUT*/
   #ifdef DEBUG_VPUT
   void    debug_vput (struct vnode *vp, const char *filename, int line);
   #define vput(vp)                debug_vput(vp, __FILE__, __LINE__)
   #endif
   
   void    vfs_subr_init(void);
   void    vfs_mount_init(void);
   void    vfs_lock_init(void);
   void    mount_init(struct mount *mp);
   
   void    vn_syncer_add(struct vnode *, int);
   void    vn_syncer_remove(struct vnode *);
   void    vn_syncer_thr_create(struct mount *);
   void    vn_syncer_thr_stop(struct mount *);
   
   extern  struct vop_ops default_vnode_vops;
   extern  struct vop_ops dead_vnode_vops;
   
   extern  struct vop_ops *default_vnode_vops_p;
   extern  struct vop_ops *dead_vnode_vops_p;
   
   #endif  /* _KERNEL */
   
   #endif  /* _KERNEL || _KERNEL_STRUCTURES */
   #endif  /* !_SYS_VNODE_H_ */

Cache object: 97e3c97c5f1a7b18baf821fa96015ea8