FreeBSD/Linux Kernel Cross Reference
sys/kern/vfs_vopops.c

     /*
      * Copyright (c) 2004,2009 The DragonFly Project.  All rights reserved.
      * 
      * This code is derived from software contributed to The DragonFly Project
      * by Matthew Dillon <dillon@backplane.com>
      * 
      * 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. Neither the name of The DragonFly Project 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 COPYRIGHT HOLDERS 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
     * COPYRIGHT HOLDERS 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.
     */
    /*
     * Implement vnode ops wrappers.  All vnode ops are wrapped through
     * these functions.
     *
     * These wrappers are responsible for hanlding all MPSAFE issues related
     * to a vnode operation.
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/buf.h>
    #include <sys/conf.h>
    #include <sys/dirent.h>
    #include <sys/domain.h>
    #include <sys/eventhandler.h>
    #include <sys/fcntl.h>
    #include <sys/kernel.h>
    #include <sys/kthread.h>
    #include <sys/malloc.h>
    #include <sys/mbuf.h>
    #include <sys/mount.h>
    #include <sys/proc.h>
    #include <sys/namei.h>
    #include <sys/reboot.h>
    #include <sys/socket.h>
    #include <sys/stat.h>
    #include <sys/sysctl.h>
    #include <sys/syslog.h>
    #include <sys/vmmeter.h>
    #include <sys/vnode.h>
    #include <sys/vfsops.h>
    #include <sys/sysmsg.h>
    #include <sys/vfs_quota.h>
    
    #include <machine/limits.h>
    
    #include <vm/vm.h>
    #include <vm/vm_object.h>
    #include <vm/vm_extern.h>
    #include <vm/vm_kern.h>
    #include <vm/pmap.h>
    #include <vm/vm_map.h>
    #include <vm/vm_page.h>
    #include <vm/vm_pager.h>
    #include <vm/vnode_pager.h>
    #include <vm/vm_zone.h>
    
    #include <sys/buf2.h>
    #include <sys/thread2.h>
    #include <sys/mplock2.h>
    
    #define VDESCNAME(name) __CONCAT(__CONCAT(vop_,name),_desc)
    
    #define VNODEOP_DESC_INIT(name)                                         \
            struct syslink_desc VDESCNAME(name) = {                         \
                    __offsetof(struct vop_ops, __CONCAT(vop_, name)),       \
                    #name }
    
    VNODEOP_DESC_INIT(default);
    VNODEOP_DESC_INIT(old_lookup);
    VNODEOP_DESC_INIT(old_create);
    VNODEOP_DESC_INIT(old_whiteout);
    VNODEOP_DESC_INIT(old_mknod);
    VNODEOP_DESC_INIT(open);
    VNODEOP_DESC_INIT(close);
    VNODEOP_DESC_INIT(access);
   VNODEOP_DESC_INIT(getattr);
   VNODEOP_DESC_INIT(setattr);
   VNODEOP_DESC_INIT(read);
   VNODEOP_DESC_INIT(write);
   VNODEOP_DESC_INIT(ioctl);
   VNODEOP_DESC_INIT(poll);
   VNODEOP_DESC_INIT(kqfilter);
   VNODEOP_DESC_INIT(mmap);
   VNODEOP_DESC_INIT(fsync);
   VNODEOP_DESC_INIT(old_remove);
   VNODEOP_DESC_INIT(old_link);
   VNODEOP_DESC_INIT(old_rename);
   
   VNODEOP_DESC_INIT(old_mkdir);
   VNODEOP_DESC_INIT(old_rmdir);
   VNODEOP_DESC_INIT(old_symlink);
   VNODEOP_DESC_INIT(readdir);
   VNODEOP_DESC_INIT(readlink);
   VNODEOP_DESC_INIT(inactive);
   VNODEOP_DESC_INIT(reclaim);
   VNODEOP_DESC_INIT(bmap);
   VNODEOP_DESC_INIT(strategy);
   VNODEOP_DESC_INIT(print);
   VNODEOP_DESC_INIT(pathconf);
   VNODEOP_DESC_INIT(advlock);
   VNODEOP_DESC_INIT(balloc);
   VNODEOP_DESC_INIT(reallocblks);
   VNODEOP_DESC_INIT(getpages);
   VNODEOP_DESC_INIT(putpages);
   VNODEOP_DESC_INIT(freeblks);
   VNODEOP_DESC_INIT(getacl);
   VNODEOP_DESC_INIT(setacl);
   VNODEOP_DESC_INIT(aclcheck);
   VNODEOP_DESC_INIT(getextattr);
   VNODEOP_DESC_INIT(setextattr);
   VNODEOP_DESC_INIT(mountctl);
   VNODEOP_DESC_INIT(markatime);
   
   VNODEOP_DESC_INIT(nresolve);
   VNODEOP_DESC_INIT(nlookupdotdot);
   VNODEOP_DESC_INIT(ncreate);
   VNODEOP_DESC_INIT(nmkdir);
   VNODEOP_DESC_INIT(nmknod);
   VNODEOP_DESC_INIT(nlink);
   VNODEOP_DESC_INIT(nsymlink);
   VNODEOP_DESC_INIT(nwhiteout);
   VNODEOP_DESC_INIT(nremove);
   VNODEOP_DESC_INIT(nrmdir);
   VNODEOP_DESC_INIT(nrename);
   
   #define DO_OPS(ops, error, ap, vop_field)       \
           error = ops->vop_field(ap);
   
   /************************************************************************
    *              PRIMARY HIGH LEVEL VNODE OPERATIONS CALLS               *
    ************************************************************************
    *
    * These procedures are called directly from the kernel and/or fileops 
    * code to perform file/device operations on the system.
    *
    * NOTE: The old namespace api functions such as vop_rename() are no
    *       longer available for general use and have been renamed to
    *       vop_old_*().  Only the code in vfs_default.c is allowed to call
    *       those ops.
    *
    * NOTE: The VFS_MPLOCK*() macros handle mounts which do not set
    *       MNTK_MPSAFE or MNTK_xx_MPSAFE.
    *
    * MPSAFE
    */
   
   int
   vop_old_lookup(struct vop_ops *ops, struct vnode *dvp,
           struct vnode **vpp, struct componentname *cnp)
   {
           struct vop_old_lookup_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_old_lookup_desc;
           ap.a_head.a_ops = ops;
           ap.a_dvp = dvp;
           ap.a_vpp = vpp;
           ap.a_cnp = cnp;
           VFS_MPLOCK1(dvp->v_mount);
           DO_OPS(ops, error, &ap, vop_old_lookup);
           VFS_MPUNLOCK(dvp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_old_create(struct vop_ops *ops, struct vnode *dvp,
           struct vnode **vpp, struct componentname *cnp, struct vattr *vap)
   {
           struct vop_old_create_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_old_create_desc;
           ap.a_head.a_ops = ops;
           ap.a_dvp = dvp;
           ap.a_vpp = vpp;
           ap.a_cnp = cnp;
           ap.a_vap = vap;
   
           VFS_MPLOCK1(dvp->v_mount);
           DO_OPS(ops, error, &ap, vop_old_create);
           VFS_MPUNLOCK(dvp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_old_whiteout(struct vop_ops *ops, struct vnode *dvp,
           struct componentname *cnp, int flags)
   {
           struct vop_old_whiteout_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_old_whiteout_desc;
           ap.a_head.a_ops = ops;
           ap.a_dvp = dvp;
           ap.a_cnp = cnp;
           ap.a_flags = flags;
   
           VFS_MPLOCK1(dvp->v_mount);
           DO_OPS(ops, error, &ap, vop_old_whiteout);
           VFS_MPUNLOCK(dvp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_old_mknod(struct vop_ops *ops, struct vnode *dvp, 
           struct vnode **vpp, struct componentname *cnp, struct vattr *vap)
   {
           struct vop_old_mknod_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_old_mknod_desc;
           ap.a_head.a_ops = ops;
           ap.a_dvp = dvp;
           ap.a_vpp = vpp;
           ap.a_cnp = cnp;
           ap.a_vap = vap;
   
           VFS_MPLOCK1(dvp->v_mount);
           DO_OPS(ops, error, &ap, vop_old_mknod);
           VFS_MPUNLOCK(dvp->v_mount);
           return(error);
   }
   
   /*
    * NOTE: VAGE is always cleared when calling VOP_OPEN().
    */
   int
   vop_open(struct vop_ops *ops, struct vnode *vp, int mode, struct ucred *cred,
           struct file *fp)
   {
           struct vop_open_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           /*
            * Decrement 3-2-1-0.  Does not decrement beyond 0
            */
           if (vp->v_flag & VAGE0) {
                   vclrflags(vp, VAGE0);
           } else if (vp->v_flag & VAGE1) {
                   vclrflags(vp, VAGE1);
                   vsetflags(vp, VAGE0);
           }
   
           ap.a_head.a_desc = &vop_open_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_fp = fp;
           ap.a_mode = mode;
           ap.a_cred = cred;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_open);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_close(struct vop_ops *ops, struct vnode *vp, int fflag)
   {
           struct vop_close_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_close_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_fflag = fflag;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_close);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_access(struct vop_ops *ops, struct vnode *vp, int mode, int flags,
              struct ucred *cred)
   {
           struct vop_access_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_access_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_mode = mode;
           ap.a_flags = flags;
           ap.a_cred = cred;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_access);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_getattr(struct vop_ops *ops, struct vnode *vp, struct vattr *vap)
   {
           struct vop_getattr_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_getattr_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_vap = vap;
   
           VFS_MPLOCK_FLAG(vp->v_mount, MNTK_GA_MPSAFE);
           DO_OPS(ops, error, &ap, vop_getattr);
           VFS_MPUNLOCK(vp->v_mount);
   
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_setattr(struct vop_ops *ops, struct vnode *vp, struct vattr *vap,
           struct ucred *cred)
   {
           struct vop_setattr_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_setattr_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_vap = vap;
           ap.a_cred = cred;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_setattr);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_read(struct vop_ops *ops, struct vnode *vp, struct uio *uio, int ioflag,
           struct ucred *cred)
   {
           struct vop_read_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_read_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_uio = uio;
           ap.a_ioflag = ioflag;
           ap.a_cred = cred;
   
           VFS_MPLOCK_FLAG(vp->v_mount, MNTK_RD_MPSAFE);
           DO_OPS(ops, error, &ap, vop_read);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_write(struct vop_ops *ops, struct vnode *vp, struct uio *uio, int ioflag,
           struct ucred *cred)
   {
           struct vop_write_args ap;
           VFS_MPLOCK_DECLARE;
           int error, do_accounting = 0;
           struct vattr va;
           uint64_t size_before=0, size_after=0;
           struct mount *mp;
           uint64_t offset, delta;
   
           ap.a_head.a_desc = &vop_write_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_uio = uio;
           ap.a_ioflag = ioflag;
           ap.a_cred = cred;
   
           /* is this a regular vnode ? */
           VFS_MPLOCK_FLAG(vp->v_mount, MNTK_WR_MPSAFE);
           if (vfs_quota_enabled && (vp->v_type == VREG)) {
                   if ((error = VOP_GETATTR(vp, &va)) != 0)
                           goto done;
                   size_before = va.va_size;
                   /* this file may already have been removed */
                   if (va.va_nlink > 0)
                           do_accounting = 1;
   
                   offset = uio->uio_offset;
                   if (ioflag & IO_APPEND)
                           offset = size_before;
                   size_after = offset + uio->uio_resid;
                   if (size_after < size_before)
                           size_after = size_before;
                   delta = size_after - size_before;
                   mp = vq_vptomp(vp);
                   /* QUOTA CHECK */
                   if (!vq_write_ok(mp, va.va_uid, va.va_gid, delta)) {
                           error = EDQUOT;
                           goto done;
                   }
           }
           DO_OPS(ops, error, &ap, vop_write);
           if ((error == 0) && do_accounting) {
                   VFS_ACCOUNT(mp, va.va_uid, va.va_gid, size_after - size_before);
           }
   done:
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_ioctl(struct vop_ops *ops, struct vnode *vp, u_long command, caddr_t data,
           int fflag, struct ucred *cred, struct sysmsg *msg)
   {
           struct vop_ioctl_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_ioctl_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_command = command;
           ap.a_data = data;
           ap.a_fflag = fflag;
           ap.a_cred = cred;
           ap.a_sysmsg = msg;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_ioctl);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_poll(struct vop_ops *ops, struct vnode *vp, int events, struct ucred *cred)
   {
           struct vop_poll_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_poll_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_events = events;
           ap.a_cred = cred;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_poll);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_kqfilter(struct vop_ops *ops, struct vnode *vp, struct knote *kn)
   {
           struct vop_kqfilter_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_kqfilter_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_kn = kn;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_kqfilter);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_mmap(struct vop_ops *ops, struct vnode *vp, int fflags, struct ucred *cred)
   {
           struct vop_mmap_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_mmap_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_fflags = fflags;
           ap.a_cred = cred;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_mmap);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_fsync(struct vop_ops *ops, struct vnode *vp, int waitfor, int flags)
   {
           struct vop_fsync_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_fsync_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_waitfor = waitfor;
           ap.a_flags = flags;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_fsync);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_old_remove(struct vop_ops *ops, struct vnode *dvp, 
           struct vnode *vp, struct componentname *cnp)
   {
           struct vop_old_remove_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_old_remove_desc;
           ap.a_head.a_ops = ops;
           ap.a_dvp = dvp;
           ap.a_vp = vp;
           ap.a_cnp = cnp;
   
           VFS_MPLOCK1(dvp->v_mount);
           DO_OPS(ops, error, &ap, vop_old_remove);
           VFS_MPUNLOCK(dvp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_old_link(struct vop_ops *ops, struct vnode *tdvp, 
           struct vnode *vp, struct componentname *cnp)
   {
           struct vop_old_link_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_old_link_desc;
           ap.a_head.a_ops = ops;
           ap.a_tdvp = tdvp;
           ap.a_vp = vp;
           ap.a_cnp = cnp;
   
           VFS_MPLOCK1(tdvp->v_mount);
           DO_OPS(ops, error, &ap, vop_old_link);
           VFS_MPUNLOCK(tdvp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_old_rename(struct vop_ops *ops, 
              struct vnode *fdvp, struct vnode *fvp, struct componentname *fcnp,
              struct vnode *tdvp, struct vnode *tvp, struct componentname *tcnp)
   {
           struct vop_old_rename_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_old_rename_desc;
           ap.a_head.a_ops = ops;
           ap.a_fdvp = fdvp;
           ap.a_fvp = fvp;
           ap.a_fcnp = fcnp;
           ap.a_tdvp = tdvp;
           ap.a_tvp = tvp;
           ap.a_tcnp = tcnp;
   
           VFS_MPLOCK1(tdvp->v_mount);
           DO_OPS(ops, error, &ap, vop_old_rename);
           VFS_MPUNLOCK(tdvp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_old_mkdir(struct vop_ops *ops, struct vnode *dvp, 
           struct vnode **vpp, struct componentname *cnp, struct vattr *vap)
   {
           struct vop_old_mkdir_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_old_mkdir_desc;
           ap.a_head.a_ops = ops;
           ap.a_dvp = dvp;
           ap.a_vpp = vpp;
           ap.a_cnp = cnp;
           ap.a_vap = vap;
   
           VFS_MPLOCK1(dvp->v_mount);
           DO_OPS(ops, error, &ap, vop_old_mkdir);
           VFS_MPUNLOCK(dvp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_old_rmdir(struct vop_ops *ops, struct vnode *dvp, 
           struct vnode *vp, struct componentname *cnp)
   {
           struct vop_old_rmdir_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_old_rmdir_desc;
           ap.a_head.a_ops = ops;
           ap.a_dvp = dvp;
           ap.a_vp = vp;
           ap.a_cnp = cnp;
   
           VFS_MPLOCK1(dvp->v_mount);
           DO_OPS(ops, error, &ap, vop_old_rmdir);
           VFS_MPUNLOCK(dvp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_old_symlink(struct vop_ops *ops, struct vnode *dvp,
           struct vnode **vpp, struct componentname *cnp,
           struct vattr *vap, char *target)
   {
           struct vop_old_symlink_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_old_symlink_desc;
           ap.a_head.a_ops = ops;
           ap.a_dvp = dvp;
           ap.a_vpp = vpp;
           ap.a_cnp = cnp;
           ap.a_vap = vap;
           ap.a_target = target;
   
           VFS_MPLOCK1(dvp->v_mount);
           DO_OPS(ops, error, &ap, vop_old_symlink);
           VFS_MPUNLOCK(dvp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_readdir(struct vop_ops *ops, struct vnode *vp, struct uio *uio,
           struct ucred *cred, int *eofflag, int *ncookies, off_t **cookies)
   {
           struct vop_readdir_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_readdir_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_uio = uio;
           ap.a_cred = cred;
           ap.a_eofflag = eofflag;
           ap.a_ncookies = ncookies;
           ap.a_cookies = cookies;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_readdir);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_readlink(struct vop_ops *ops, struct vnode *vp, struct uio *uio,
           struct ucred *cred)
   {
           struct vop_readlink_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_readlink_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_uio = uio;
           ap.a_cred = cred;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_readlink);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_inactive(struct vop_ops *ops, struct vnode *vp)
   {
           struct vop_inactive_args ap;
           struct mount *mp;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_inactive_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
   
           /*
            * WARNING!  Deactivation of the vnode can cause it to be recycled,
            *           clearing vp->v_mount.
            */
           mp = vp->v_mount;
           VFS_MPLOCK_FLAG(mp, MNTK_IN_MPSAFE);
           DO_OPS(ops, error, &ap, vop_inactive);
           VFS_MPUNLOCK(mp);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_reclaim(struct vop_ops *ops, struct vnode *vp)
   {
           struct vop_reclaim_args ap;
           struct mount *mp;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_reclaim_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
   
           /*
            * WARNING!  Reclamation of the vnode will clear vp->v_mount.
            */
           mp = vp->v_mount;
           VFS_MPLOCK1(mp);
           DO_OPS(ops, error, &ap, vop_reclaim);
           VFS_MPUNLOCK(mp);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_bmap(struct vop_ops *ops, struct vnode *vp, off_t loffset,
           off_t *doffsetp, int *runp, int *runb, buf_cmd_t cmd)
   {
           struct vop_bmap_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_bmap_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_loffset = loffset;
           ap.a_doffsetp = doffsetp;
           ap.a_runp = runp;
           ap.a_runb = runb;
           ap.a_cmd = cmd;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_bmap);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_strategy(struct vop_ops *ops, struct vnode *vp, struct bio *bio)
   {
           struct vop_strategy_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_strategy_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_bio = bio;
   
           if (vp->v_mount) {
                   VFS_MPLOCK_FLAG(vp->v_mount, MNTK_SG_MPSAFE);
                   DO_OPS(ops, error, &ap, vop_strategy);
                   VFS_MPUNLOCK(vp->v_mount);
           } else {
                   /* ugly hack for swap */
                   get_mplock();
                   DO_OPS(ops, error, &ap, vop_strategy);
                   rel_mplock();
           }
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_print(struct vop_ops *ops, struct vnode *vp)
   {
           struct vop_print_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_print_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_print);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_pathconf(struct vop_ops *ops, struct vnode *vp, int name,
           register_t *retval)
   {
           struct vop_pathconf_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_pathconf_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_name = name;
           ap.a_retval = retval;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_pathconf);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_advlock(struct vop_ops *ops, struct vnode *vp, caddr_t id, int op,
           struct flock *fl, int flags)
   {
           struct vop_advlock_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_advlock_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_id = id;
           ap.a_op = op;
           ap.a_fl = fl;
           ap.a_flags = flags;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_advlock);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_balloc(struct vop_ops *ops, struct vnode *vp, off_t startoffset,
           int size, struct ucred *cred, int flags,
           struct buf **bpp)
   {
           struct vop_balloc_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_balloc_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_startoffset = startoffset;
           ap.a_size = size;
           ap.a_cred = cred;
           ap.a_flags = flags;
           ap.a_bpp = bpp;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_balloc);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_reallocblks(struct vop_ops *ops, struct vnode *vp,
           struct cluster_save *buflist)
   {
           struct vop_reallocblks_args ap;
           VFS_MPLOCK_DECLARE;
           int error;
   
           ap.a_head.a_desc = &vop_reallocblks_desc;
           ap.a_head.a_ops = ops;
           ap.a_vp = vp;
           ap.a_buflist = buflist;
   
           VFS_MPLOCK1(vp->v_mount);
           DO_OPS(ops, error, &ap, vop_reallocblks);
           VFS_MPUNLOCK(vp->v_mount);
           return(error);
   }
   
   /*
    * MPSAFE
    */
   int
   vop_getpages(struct vop_ops *ops, struct vnode *vp, vm_page_t *m, int count,
           int reqpage, vm_ooffset_t offset, int seqaccess)
  {
          struct vop_getpages_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_getpages_desc;
          ap.a_head.a_ops = ops;
          ap.a_vp = vp;
          ap.a_m = m;
          ap.a_count = count;
          ap.a_reqpage = reqpage;
          ap.a_offset = offset;
          ap.a_seqaccess = seqaccess;
  
          VFS_MPLOCK1(vp->v_mount);
          DO_OPS(ops, error, &ap, vop_getpages);
          VFS_MPUNLOCK(vp->v_mount);
          return(error);
  }
  
  /*
   * MPSAFE
   */
  int
  vop_putpages(struct vop_ops *ops, struct vnode *vp, vm_page_t *m, int count,
          int sync, int *rtvals, vm_ooffset_t offset)
  {
          struct vop_putpages_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_putpages_desc;
          ap.a_head.a_ops = ops;
          ap.a_vp = vp;
          ap.a_m = m;
          ap.a_count = count;
          ap.a_sync = sync;
          ap.a_rtvals = rtvals;
          ap.a_offset = offset;
  
          VFS_MPLOCK1(vp->v_mount);
          DO_OPS(ops, error, &ap, vop_putpages);
          VFS_MPUNLOCK(vp->v_mount);
          return(error);
  }
  
  /*
   * MPSAFE
   */
  int
  vop_freeblks(struct vop_ops *ops, struct vnode *vp, off_t offset, int length)
  {
          struct vop_freeblks_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_freeblks_desc;
          ap.a_head.a_ops = ops;
          ap.a_vp = vp;
          ap.a_offset = offset;
          ap.a_length = length;
  
          VFS_MPLOCK1(vp->v_mount);
          DO_OPS(ops, error, &ap, vop_freeblks);
          VFS_MPUNLOCK(vp->v_mount);
          return(error);
  }
  
  /*
   * MPSAFE
   */
  int
  vop_getacl(struct vop_ops *ops, struct vnode *vp, acl_type_t type,
          struct acl *aclp, struct ucred *cred)
  {
          struct vop_getacl_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_getacl_desc;
          ap.a_head.a_ops = ops;
          ap.a_vp = vp;
          ap.a_type = type;
          ap.a_aclp = aclp;
          ap.a_cred = cred;
  
          VFS_MPLOCK1(vp->v_mount);
          DO_OPS(ops, error, &ap, vop_getacl);
          VFS_MPUNLOCK(vp->v_mount);
          return(error);
  }
  
  /*
   * MPSAFE
   */
  int
  vop_setacl(struct vop_ops *ops, struct vnode *vp, acl_type_t type,
          struct acl *aclp, struct ucred *cred)
  {
          struct vop_setacl_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_setacl_desc;
          ap.a_head.a_ops = ops;
          ap.a_vp = vp;
          ap.a_type = type;
          ap.a_aclp = aclp;
          ap.a_cred = cred;
  
          VFS_MPLOCK1(vp->v_mount);
          DO_OPS(ops, error, &ap, vop_setacl);
          VFS_MPUNLOCK(vp->v_mount);
          return(error);
  }
  
  /*
   * MPSAFE
   */
  int
  vop_aclcheck(struct vop_ops *ops, struct vnode *vp, acl_type_t type,
          struct acl *aclp, struct ucred *cred)
  {
          struct vop_aclcheck_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_aclcheck_desc;
          ap.a_head.a_ops = ops;
          ap.a_vp = vp;
          ap.a_type = type;
          ap.a_aclp = aclp;
          ap.a_cred = cred;
  
          VFS_MPLOCK1(vp->v_mount);
          DO_OPS(ops, error, &ap, vop_aclcheck);
          VFS_MPUNLOCK(vp->v_mount);
          return(error);
  }
  
  /*
   * MPSAFE
   */
  int
  vop_getextattr(struct vop_ops *ops, struct vnode *vp, int attrnamespace,
                 char *attrname, struct uio *uio, struct ucred *cred)
  {
          struct vop_getextattr_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_getextattr_desc;
          ap.a_head.a_ops = ops;
          ap.a_vp = vp;
          ap.a_attrnamespace = attrnamespace;
          ap.a_attrname = attrname;
          ap.a_uio = uio;
          ap.a_cred = cred;
  
          VFS_MPLOCK1(vp->v_mount);
          DO_OPS(ops, error, &ap, vop_getextattr);
          VFS_MPUNLOCK(vp->v_mount);
          return(error);
  }
  
  /*
   * MPSAFE
   */
  int
  vop_setextattr(struct vop_ops *ops, struct vnode *vp, int attrnamespace,
                 char *attrname, struct uio *uio, struct ucred *cred)
  {
          struct vop_setextattr_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_setextattr_desc;
          ap.a_head.a_ops = ops;
          ap.a_vp = vp;
          ap.a_attrnamespace = attrnamespace;
          ap.a_attrname = attrname;
          ap.a_uio = uio;
          ap.a_cred = cred;
  
          VFS_MPLOCK1(vp->v_mount);
          DO_OPS(ops, error, &ap, vop_setextattr);
          VFS_MPUNLOCK(vp->v_mount);
          return(error);
  }
  
  /*
   * MPSAFE
   */
  int
  vop_mountctl(struct vop_ops *ops, struct vnode *vp, int op, struct file *fp,
               const void *ctl, int ctllen, void *buf, int buflen, int *res)
  {
          struct vop_mountctl_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_mountctl_desc;
          ap.a_head.a_ops = ops;
          ap.a_op = op;
          ap.a_ctl = ctl;
          ap.a_fp = fp;
          ap.a_ctllen = ctllen;
          ap.a_buf = buf;
          ap.a_buflen = buflen;
          ap.a_res = res;
  
          VFS_MPLOCK1(vp->v_mount);
          DO_OPS(ops, error, &ap, vop_mountctl);
          VFS_MPUNLOCK(vp->v_mount);
          return(error);
  }
  
  /*
   * MPSAFE
   */
  int
  vop_markatime(struct vop_ops *ops, struct vnode *vp, struct ucred *cred)
  {
          struct vop_markatime_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_markatime_desc;
          ap.a_head.a_ops = ops;
          ap.a_vp = vp;
          ap.a_cred = cred;
  
          VFS_MPLOCK1(vp->v_mount);
          DO_OPS(ops, error, &ap, vop_markatime);
          VFS_MPUNLOCK(vp->v_mount);
          return(error);
  }
  
  /*
   * NEW API FUNCTIONS
   *
   * nresolve takes a locked ncp, a referenced but unlocked dvp, and a cred,
   * and resolves the ncp into a positive or negative hit.
   *
   * The namecache is automatically adjusted by this function.  The ncp
   * is left locked on return.
   *
   * MPSAFE
   */
  int
  vop_nresolve(struct vop_ops *ops, struct nchandle *nch,
               struct vnode *dvp, struct ucred *cred)
  {
          struct vop_nresolve_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_nresolve_desc;
          ap.a_head.a_ops = ops;
          ap.a_nch = nch;
          ap.a_dvp = dvp;
          ap.a_cred = cred;
  
          VFS_MPLOCK1(dvp->v_mount);
          DO_OPS(ops, error, &ap, vop_nresolve);
          VFS_MPUNLOCK(dvp->v_mount);
          return(error);
  }
  
  /*
   * nlookupdotdot takes an unlocked directory, referenced dvp, and looks
   * up "..", returning a locked parent directory in *vpp.  If an error
   * occurs *vpp will be NULL.
   *
   * MPSAFE
   */
  int
  vop_nlookupdotdot(struct vop_ops *ops, struct vnode *dvp,
          struct vnode **vpp, struct ucred *cred, char **fakename)
  {
          struct vop_nlookupdotdot_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_nlookupdotdot_desc;
          ap.a_head.a_ops = ops;
          ap.a_dvp = dvp;
          ap.a_vpp = vpp;
          ap.a_cred = cred;
          ap.a_fakename = fakename;
  
          VFS_MPLOCK1(dvp->v_mount);
          DO_OPS(ops, error, &ap, vop_nlookupdotdot);
          VFS_MPUNLOCK(dvp->v_mount);
          return(error);
  }
  
  /*
   * ncreate takes a locked, resolved ncp that typically represents a negative
   * cache hit and creates the file or node specified by the ncp, cred, and
   * vattr.  If no error occurs a locked vnode is returned in *vpp.
   *
   * The dvp passed in is referenced but unlocked.
   *
   * The namecache is automatically adjusted by this function.  The ncp
   * is left locked on return.
   *
   * MPSAFE
   */
  int
  vop_ncreate(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
          struct vnode **vpp, struct ucred *cred, struct vattr *vap)
  {
          struct vop_ncreate_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_ncreate_desc;
          ap.a_head.a_ops = ops;
          ap.a_nch = nch;
          ap.a_dvp = dvp;
          ap.a_vpp = vpp;
          ap.a_cred = cred;
          ap.a_vap = vap;
  
          VFS_MPLOCK1(dvp->v_mount);
          DO_OPS(ops, error, &ap, vop_ncreate);
          VFS_MPUNLOCK(dvp->v_mount);
          return(error);
  }
  
  /*
   * nmkdir takes a locked, resolved ncp that typically represents a negative
   * cache hit and creates the directory specified by the ncp, cred, and
   * vattr.  If no error occurs a locked vnode is returned in *vpp.
   *
   * The dvp passed in is referenced but unlocked.
   *
   * The namecache is automatically adjusted by this function.  The ncp
   * is left locked on return.
   *
   * MPSAFE
   */
  int
  vop_nmkdir(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
          struct vnode **vpp, struct ucred *cred, struct vattr *vap)
  {
          struct vop_nmkdir_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_nmkdir_desc;
          ap.a_head.a_ops = ops;
          ap.a_nch = nch;
          ap.a_dvp = dvp;
          ap.a_vpp = vpp;
          ap.a_cred = cred;
          ap.a_vap = vap;
  
          VFS_MPLOCK1(dvp->v_mount);
          DO_OPS(ops, error, &ap, vop_nmkdir);
          VFS_MPUNLOCK(dvp->v_mount);
          return(error);
  }
  
  /*
   * nmknod takes a locked, resolved ncp that typically represents a negative
   * cache hit and creates the node specified by the ncp, cred, and
   * vattr.  If no error occurs a locked vnode is returned in *vpp.
   *
   * The dvp passed in is referenced but unlocked.
   *
   * The namecache is automatically adjusted by this function.  The ncp
   * is left locked on return.
   *
   * MPSAFE
   */
  int
  vop_nmknod(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
          struct vnode **vpp, struct ucred *cred, struct vattr *vap)
  {
          struct vop_nmknod_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_nmknod_desc;
          ap.a_head.a_ops = ops;
          ap.a_nch = nch;
          ap.a_dvp = dvp;
          ap.a_vpp = vpp;
          ap.a_cred = cred;
          ap.a_vap = vap;
  
          VFS_MPLOCK1(dvp->v_mount);
          DO_OPS(ops, error, &ap, vop_nmknod);
          VFS_MPUNLOCK(dvp->v_mount);
          return(error);
  }
  
  /*
   * nlink takes a locked, resolved ncp that typically represents a negative
   * cache hit and creates the node specified by the ncp, cred, and
   * existing vnode.  The passed vp must be locked and will remain locked
   * on return, as does the ncp, whether an error occurs or not.
   *
   * The dvp passed in is referenced but unlocked.
   *
   * The namecache is automatically adjusted by this function.  The ncp
   * is left locked on return.
   *
   * MPSAFE
   */
  int
  vop_nlink(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
            struct vnode *vp, struct ucred *cred)
  {
          struct vop_nlink_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_nlink_desc;
          ap.a_head.a_ops = ops;
          ap.a_nch = nch;
          ap.a_dvp = dvp;
          ap.a_vp = vp;
          ap.a_cred = cred;
  
          VFS_MPLOCK1(dvp->v_mount);
          DO_OPS(ops, error, &ap, vop_nlink);
          VFS_MPUNLOCK(dvp->v_mount);
          return(error);
  }
  
  /*
   * nsymlink takes a locked, resolved ncp that typically represents a negative
   * cache hit and creates a symbolic link based on cred, vap, and target (the
   * contents of the link).  If no error occurs a locked vnode is returned in
   * *vpp.
   *
   * The dvp passed in is referenced but unlocked.
   *
   * The namecache is automatically adjusted by this function.  The ncp
   * is left locked on return.
   *
   * MPSAFE
   */
  int
  vop_nsymlink(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
          struct vnode **vpp, struct ucred *cred,
          struct vattr *vap, char *target)
  {
          struct vop_nsymlink_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_nsymlink_desc;
          ap.a_head.a_ops = ops;
          ap.a_nch = nch;
          ap.a_dvp = dvp;
          ap.a_vpp = vpp;
          ap.a_cred = cred;
          ap.a_vap = vap;
          ap.a_target = target;
  
          VFS_MPLOCK1(dvp->v_mount);
          DO_OPS(ops, error, &ap, vop_nsymlink);
          VFS_MPUNLOCK(dvp->v_mount);
          return(error);
  }
  
  /*
   * nwhiteout takes a locked, resolved ncp that can represent a positive or
   * negative hit and executes the whiteout function specified in flags.
   *
   * The dvp passed in is referenced but unlocked.
   *
   * The namecache is automatically adjusted by this function.  The ncp
   * is left locked on return.
   *
   * MPSAFE
   */
  int
  vop_nwhiteout(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
          struct ucred *cred, int flags)
  {
          struct vop_nwhiteout_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_nwhiteout_desc;
          ap.a_head.a_ops = ops;
          ap.a_nch = nch;
          ap.a_dvp = dvp;
          ap.a_cred = cred;
          ap.a_flags = flags;
  
          VFS_MPLOCK1(dvp->v_mount);
          DO_OPS(ops, error, &ap, vop_nwhiteout);
          VFS_MPUNLOCK(dvp->v_mount);
          return(error);
  }
  
  /*
   * nremove takes a locked, resolved ncp that generally represents a
   * positive hit and removes the file.
   *
   * The dvp passed in is referenced but unlocked.
   *
   * The namecache is automatically adjusted by this function.  The ncp
   * is left locked on return.
   *
   * MPSAFE
   */
  int
  vop_nremove(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
              struct ucred *cred)
  {
          struct vop_nremove_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
          struct vattr va;
  
          ap.a_head.a_desc = &vop_nremove_desc;
          ap.a_head.a_ops = ops;
          ap.a_nch = nch;
          ap.a_dvp = dvp;
          ap.a_cred = cred;
  
          if ((error = VOP_GETATTR(nch->ncp->nc_vp, &va)) != 0)
                  return (error);
  
          VFS_MPLOCK1(dvp->v_mount);
          DO_OPS(ops, error, &ap, vop_nremove);
          /* Only update space counters if this is the last hard link */
          if ((error == 0) && (va.va_nlink == 1)) {
                  VFS_ACCOUNT(nch->mount, va.va_uid, va.va_gid, -va.va_size);
          }
          VFS_MPUNLOCK(dvp->v_mount);
          return(error);
  }
  
  /*
   * nrmdir takes a locked, resolved ncp that generally represents a
   * directory and removes the directory.
   *
   * The dvp passed in is referenced but unlocked.
   *
   * The namecache is automatically adjusted by this function.  The ncp
   * is left locked on return.
   *
   * MPSAFE
   */
  int
  vop_nrmdir(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
             struct ucred *cred)
  {
          struct vop_nrmdir_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_nrmdir_desc;
          ap.a_head.a_ops = ops;
          ap.a_nch = nch;
          ap.a_dvp = dvp;
          ap.a_cred = cred;
  
          VFS_MPLOCK1(dvp->v_mount);
          DO_OPS(ops, error, &ap, vop_nrmdir);
          VFS_MPUNLOCK(dvp->v_mount);
          return(error);
  }
  
  /*
   * nrename takes TWO locked, resolved ncp's and the cred of the caller
   * and renames the source ncp to the target ncp.  The target ncp may 
   * represent a positive or negative hit.
   *
   * The fdvp and tdvp passed in are referenced but unlocked.
   *
   * The namecache is automatically adjusted by this function.  The ncp
   * is left locked on return.  The source ncp is typically changed to
   * a negative cache hit and the target ncp typically takes on the
   * source ncp's underlying file.
   *
   * MPSAFE
   */
  int
  vop_nrename(struct vop_ops *ops,
              struct nchandle *fnch, struct nchandle *tnch,
              struct vnode *fdvp, struct vnode *tdvp,
              struct ucred *cred)
  {
          struct vop_nrename_args ap;
          VFS_MPLOCK_DECLARE;
          int error;
  
          ap.a_head.a_desc = &vop_nrename_desc;
          ap.a_head.a_ops = ops;
          ap.a_fnch = fnch;
          ap.a_tnch = tnch;
          ap.a_fdvp = fdvp;
          ap.a_tdvp = tdvp;
          ap.a_cred = cred;
  
          VFS_MPLOCK1(fdvp->v_mount);
          DO_OPS(ops, error, &ap, vop_nrename);
          VFS_MPUNLOCK(fdvp->v_mount);
          return(error);
  }
  
  /************************************************************************
   *              PRIMARY VNODE OPERATIONS FORWARDING CALLS               *
   ************************************************************************
   *
   * These procedures are called from VFSs such as unionfs and nullfs
   * when they wish to forward an operation on one VFS to another.  The
   * argument structure/message is modified and then directly passed to the
   * appropriate routine.  This routines may also be called by initiators
   * who have an argument structure in hand rather then discreet arguments.
   *
   * MPSAFE - Caller expected to already hold the appropriate vfs lock.
   */
  int
  vop_vnoperate_ap(struct vop_generic_args *ap)
  {
          struct vop_ops *ops;
          int error;
  
          ops = ap->a_ops;
          error = VOCALL(ops, ap);
  
          return (error);
  }
  
  /*
   * This routine is called by the cache coherency layer to execute the actual
   * VFS operation.  If a journaling layer is present we call though it, else
   * we call the native VOP functions.
   */
  int
  vop_cache_operate_ap(struct vop_generic_args *ap)
  {
          struct vop_ops *ops;
          int error;
  
          ops = ap->a_ops;
          if (ops->head.vv_mount->mnt_vn_journal_ops)
                  error = VOCALL(ops->head.vv_mount->mnt_vn_journal_ops, ap);
          else
                  error = VOCALL(ops->head.vv_mount->mnt_vn_norm_ops, ap);
          return (error);
  }
  
  
  /*
   * This routine is called by the journaling layer to execute the actual
   * VFS operation.
   */
  int
  vop_journal_operate_ap(struct vop_generic_args *ap)
  {
          struct vop_ops *ops;
          int error;
  
          ops = ap->a_ops;
          error = VOCALL(ops->head.vv_mount->mnt_vn_norm_ops, ap);
  
          return (error);
  }
  
  int
  vop_open_ap(struct vop_open_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_open);
          return(error);
  }
  
  int
  vop_close_ap(struct vop_close_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_close);
          return(error);
  }
  
  int
  vop_access_ap(struct vop_access_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_access);
          return(error);
  }
  
  int
  vop_getattr_ap(struct vop_getattr_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_getattr);
          return(error);
  }
  
  int
  vop_setattr_ap(struct vop_setattr_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_setattr);
          return(error);
  }
  
  int
  vop_read_ap(struct vop_read_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_read);
          return(error);
  }
  
  int
  vop_write_ap(struct vop_write_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_write);
          return(error);
  }
  
  int
  vop_ioctl_ap(struct vop_ioctl_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_ioctl);
          return(error);
  }
  
  int
  vop_poll_ap(struct vop_poll_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_poll);
          return(error);
  }
  
  int
  vop_kqfilter_ap(struct vop_kqfilter_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_kqfilter);
          return(error);
  }
  
  int
  vop_mmap_ap(struct vop_mmap_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_mmap);
          return(error);
  }
  
  int
  vop_fsync_ap(struct vop_fsync_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_fsync);
          return(error);
  }
  
  int
  vop_readdir_ap(struct vop_readdir_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_readdir);
          return(error);
  }
  
  int
  vop_readlink_ap(struct vop_readlink_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_readlink);
          return(error);
  }
  
  int
  vop_inactive_ap(struct vop_inactive_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_inactive);
          return(error);
  }
  
  int
  vop_reclaim_ap(struct vop_reclaim_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_reclaim);
          return(error);
  }
  
  int
  vop_bmap_ap(struct vop_bmap_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_bmap);
          return(error);
  }
  
  int
  vop_strategy_ap(struct vop_strategy_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_strategy);
          return(error);
  }
  
  int
  vop_print_ap(struct vop_print_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_print);
          return(error);
  }
  
  int
  vop_pathconf_ap(struct vop_pathconf_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_pathconf);
          return(error);
  }
  
  int
  vop_advlock_ap(struct vop_advlock_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_advlock);
          return(error);
  }
  
  int
  vop_balloc_ap(struct vop_balloc_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_balloc);
          return(error);
  }
  
  int
  vop_reallocblks_ap(struct vop_reallocblks_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_reallocblks);
          return(error);
  }
  
  int
  vop_getpages_ap(struct vop_getpages_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_getpages);
          return(error);
  }
  
  int
  vop_putpages_ap(struct vop_putpages_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_putpages);
          return(error);
  }
  
  int
  vop_freeblks_ap(struct vop_freeblks_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_freeblks);
          return(error);
  }
  
  int
  vop_getacl_ap(struct vop_getacl_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_getacl);
          return(error);
  }
  
  int
  vop_setacl_ap(struct vop_setacl_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_setacl);
          return(error);
  }
  
  int
  vop_aclcheck_ap(struct vop_aclcheck_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_aclcheck);
          return(error);
  }
  
  int
  vop_getextattr_ap(struct vop_getextattr_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_getextattr);
          return(error);
  }
  
  int
  vop_setextattr_ap(struct vop_setextattr_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_setextattr);
          return(error);
  }
  
  int
  vop_mountctl_ap(struct vop_mountctl_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_mountctl);
          return(error);
  }
  
  int
  vop_markatime_ap(struct vop_markatime_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_markatime);
          return(error);
  }
  
  int
  vop_nresolve_ap(struct vop_nresolve_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_nresolve);
          return(error);
  }
  
  int
  vop_nlookupdotdot_ap(struct vop_nlookupdotdot_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_nlookupdotdot);
          return(error);
  }
  
  int
  vop_ncreate_ap(struct vop_ncreate_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_ncreate);
          return(error);
  }
  
  int
  vop_nmkdir_ap(struct vop_nmkdir_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_nmkdir);
          return(error);
  }
  
  int
  vop_nmknod_ap(struct vop_nmknod_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_nmknod);
          return(error);
  }
  
  int
  vop_nlink_ap(struct vop_nlink_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_nlink);
          return(error);
  }
  
  int
  vop_nsymlink_ap(struct vop_nsymlink_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_nsymlink);
          return(error);
  }
  
  int
  vop_nwhiteout_ap(struct vop_nwhiteout_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_nwhiteout);
          return(error);
  }
  
  int
  vop_nremove_ap(struct vop_nremove_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_nremove);
          return(error);
  }
  
  int
  vop_nrmdir_ap(struct vop_nrmdir_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_nrmdir);
          return(error);
  }
  
  int
  vop_nrename_ap(struct vop_nrename_args *ap)
  {
          int error;
  
          DO_OPS(ap->a_head.a_ops, error, ap, vop_nrename);
          return(error);
  }
  

Cache object: 5716e337333958dd09737001d142d4a0