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

     /*
      * Copyright (c) 2004 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.
     *
     * $DragonFly: src/sys/sys/vfsops.h,v 1.32 2008/06/19 23:27:36 dillon Exp $
     */
    
    /*
     * The vop_ops structure vectors all access to a filesystem.  It contains a
     * fixed set of vectors.
     *
     * In DragonFly the ultimate goal is to thread the VFS, which means that
     * the dispatch functions will eventually be called from the context of 
     * a management thread rather then directly called by a process.  This
     * requires us to divorce direct process dependancies (in particular ioctl
     * and UIO's).  In addition, it is our intention to implement kernel
     * level cache management and coherency in the vop_*() interfacing
     * layer.
     *
     * The number of management threads will depend on the VFS.  The idea is
     * to give a high performance VFS such as UFS at least one thread per cpu,
     * and a low performance VFS such as CD9660 perhaps just one thread period.
     * Blocking issues within the management thread are up to the VFS itself,
     * but DragonFly will introduce a layer above the VFS to handle cacheable
     * requests without having to enter the VFS (e.g. by making attribute
     * and VM object information a permanent fixture of the vnode structure
     * and accessing them directly).
     *
     * THE VOPOPS VECTORS SHOULD NEVER BE CALLED DIRECTLY!  Instead always use
     * the kernel helper procedures vop_*() to call a vopop.  The kernel
     * helper procedure will be responsible for handling the DragonFly messaging
     * conversion when it occurs.
     */
    
    #ifndef _SYS_VFSOPS_H_
    #define _SYS_VFSOPS_H_
    
    #ifndef _SYS_ACL_H_
    #include <sys/acl.h>
    #endif
    #ifndef _SYS_BUF_H_
    #include <sys/buf.h>    /* buf_cmd_t */
    #endif
    #ifndef _SYS_FCNTL_H_
    #include <sys/fcntl.h>  /* AT_EACCESS */
    #endif
    
    struct syslink_desc;
    struct vnode;
    struct thread;
    struct nchandle;
    struct componentname;
    struct vattr;
    struct ucred;
    struct uio;
    struct file;
    struct knote;
    struct vm_object;
    struct vm_page;
    struct vfscache;
    
    struct vop_generic_args {
            struct syslink_desc *a_desc;    /* command descriptor for the call */
            struct vop_ops *a_ops;          /* operations vector for the call */
            int a_reserved[4];
    };
    
    struct vop_old_lookup_args {
            struct vop_generic_args a_head;
            struct vnode *a_dvp;
           struct vnode **a_vpp;
           struct componentname *a_cnp;
   };
   
   struct vop_old_create_args {
           struct vop_generic_args a_head;
           struct vnode *a_dvp;
           struct vnode **a_vpp;
           struct componentname *a_cnp;
           struct vattr *a_vap;
   };
   
   struct vop_old_whiteout_args {
           struct vop_generic_args a_head;
           struct vnode *a_dvp;
           struct componentname *a_cnp;
           int a_flags;
   };
   
   struct vop_old_mknod_args {
           struct vop_generic_args a_head;
           struct vnode *a_dvp;
           struct vnode **a_vpp;
           struct componentname *a_cnp;
           struct vattr *a_vap;
   };
   
   struct vop_open_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           int a_mode;
           struct ucred *a_cred;
           struct file *a_fp;              /* optional fp for fileops override */
   };
   
   struct vop_close_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           int a_fflag;
   };
   
   struct vop_access_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           int a_mode;                             /* V* bitmask */
           int a_flags;                            /* AT_* bitmask */
           struct ucred *a_cred;
   };
   
   struct vop_getattr_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           struct vattr *a_vap;
   };
   
   struct vop_setattr_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           struct vattr *a_vap;
           struct ucred *a_cred;
   };
   
   struct vop_read_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           struct uio *a_uio;
           int a_ioflag;
           struct ucred *a_cred;
   };
   
   struct vop_write_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           struct uio *a_uio;
           int a_ioflag;
           struct ucred *a_cred;
   };
   
   struct vop_ioctl_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           u_long a_command;
           caddr_t a_data;
           int a_fflag;
           struct ucred *a_cred;
           struct sysmsg *a_sysmsg;
   };
   
   struct vop_poll_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           int a_events;
           struct ucred *a_cred;
   };
   
   struct vop_kqfilter_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           struct knote *a_kn;
   };
   
   struct vop_mmap_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           int a_fflags;
           struct ucred *a_cred;
   };
   
   struct vop_fsync_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           int a_waitfor;
           int a_flags;
   };
   
   struct vop_old_remove_args {
           struct vop_generic_args a_head;
           struct vnode *a_dvp;
           struct vnode *a_vp;
           struct componentname *a_cnp;
   };
   
   struct vop_old_link_args {
           struct vop_generic_args a_head;
           struct vnode *a_tdvp;
           struct vnode *a_vp;
           struct componentname *a_cnp;
   };
   
   struct vop_old_rename_args {
           struct vop_generic_args a_head;
           struct vnode *a_fdvp;
           struct vnode *a_fvp;
           struct componentname *a_fcnp;
           struct vnode *a_tdvp;
           struct vnode *a_tvp;
           struct componentname *a_tcnp;
   };
   
   struct vop_old_mkdir_args {
           struct vop_generic_args a_head;
           struct vnode *a_dvp;
           struct vnode **a_vpp;
           struct componentname *a_cnp;
           struct vattr *a_vap;
   };
   
   struct vop_old_rmdir_args {
           struct vop_generic_args a_head;
           struct vnode *a_dvp;
           struct vnode *a_vp;
           struct componentname *a_cnp;
   };
   
   struct vop_old_symlink_args {
           struct vop_generic_args a_head;
           struct vnode *a_dvp;
           struct vnode **a_vpp;
           struct componentname *a_cnp;
           struct vattr *a_vap;
           char *a_target;
   };
   
   struct vop_readdir_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           struct uio *a_uio;
           struct ucred *a_cred;
           int *a_eofflag;
           int *a_ncookies;
           off_t **a_cookies;
   };
   
   struct vop_readlink_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           struct uio *a_uio;
           struct ucred *a_cred;
   };
   
   struct vop_inactive_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
   };
   
   struct vop_reclaim_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
   };
   
   struct vop_bmap_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           off_t a_loffset;
           off_t *a_doffsetp;
           int *a_runp;
           int *a_runb;
           buf_cmd_t a_cmd;        /* BUF_CMD_READ, BUF_CMD_WRITE, etc */
   };
   
   struct vop_strategy_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           struct bio *a_bio;
   };
   
   struct vop_print_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
   };
   
   struct vop_pathconf_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           int a_name;
           register_t *a_retval;
   };
   
   struct vop_advlock_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           caddr_t a_id;
           int a_op;
           struct flock *a_fl;
           int a_flags;
   };
   
   struct vop_balloc_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           off_t a_startoffset;
           int a_size;
           struct ucred *a_cred;
           int a_flags;
           struct buf **a_bpp;
   };
   
   struct vop_reallocblks_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           struct cluster_save *a_buflist;
   };
   
   struct vop_getpages_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           struct vm_page **a_m;
           int a_count;
           int a_reqpage;
           vm_ooffset_t a_offset;
           int a_seqaccess;
   };
   
   struct vop_putpages_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           struct vm_page **a_m;
           int a_count;
           int a_sync;
           int *a_rtvals;
           vm_ooffset_t a_offset;
   };
   
   struct vop_freeblks_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           off_t a_offset;
           int a_length;
   };
   
   struct vop_getacl_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           acl_type_t a_type;
           struct acl *a_aclp;
           struct ucred *a_cred;
   };
   
   struct vop_setacl_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           acl_type_t a_type;
           struct acl *a_aclp;
           struct ucred *a_cred;
   };
   
   struct vop_aclcheck_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           acl_type_t a_type;
           struct acl *a_aclp;
           struct ucred *a_cred;
   };
   
   struct vop_getextattr_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           int a_attrnamespace;
           char *a_attrname;
           struct uio *a_uio;
           struct ucred *a_cred;
   };
   
   struct vop_setextattr_args {
           struct vop_generic_args a_head;
           struct vnode *a_vp;
           int a_attrnamespace;
           char *a_attrname;
           struct uio *a_uio;
           struct ucred *a_cred;
   };
   
   struct vop_mountctl_args {
           struct vop_generic_args a_head;
           int a_op;
           struct file *a_fp;
           const void *a_ctl;
           int a_ctllen;
           void *a_buf;
           int a_buflen;
           int *a_res;
           struct vnode *a_vp;
   };
   
   struct vop_markatime_args {
           struct vop_generic_args a_head;
           int a_op;
           struct vnode *a_vp;
           struct ucred *a_cred;
   };
   
   /*
    * NEW API
    */
   
   /*
    * Warning: a_dvp is only held, not ref'd.  The target must still vget()
    * it.
    */
   struct vop_nresolve_args {
           struct vop_generic_args a_head;
           struct nchandle *a_nch;
           struct vnode *a_dvp;
           struct ucred *a_cred;
   };
   
   struct vop_nlookupdotdot_args {
           struct vop_generic_args a_head;
           struct vnode *a_dvp;
           struct vnode **a_vpp;
           struct ucred *a_cred;
           char **a_fakename;
   };
   
   /*
    * Warning: a_dvp is only held, not ref'd.  The target must still vget()
    * it.
    */
   struct vop_ncreate_args {
           struct vop_generic_args a_head;
           struct nchandle *a_nch;         /* locked namespace */
           struct vnode *a_dvp;            /* held directory vnode */
           struct vnode **a_vpp;           /* returned refd & locked */
           struct ucred *a_cred;
           struct vattr *a_vap;
   };
   
   /*
    * Warning: a_dvp is only held, not ref'd.  The target must still vget()
    * it.
    */
   struct vop_nmkdir_args {
           struct vop_generic_args a_head;
           struct nchandle *a_nch;         /* locked namespace */
           struct vnode *a_dvp;
           struct vnode **a_vpp;                   /* returned refd & locked */
           struct ucred *a_cred;
           struct vattr *a_vap;
   };
   
   /*
    * Warning: a_dvp is only held, not ref'd.  The target must still vget()
    * it.
    */
   struct vop_nmknod_args {
           struct vop_generic_args a_head;
           struct nchandle *a_nch;
           struct vnode *a_dvp;
           struct vnode **a_vpp;
           struct ucred *a_cred;
           struct vattr *a_vap;
   };
   
   /*
    * Warning: a_dvp is only held, not ref'd.  The target must still vget()
    * it.
    */
   struct vop_nlink_args {
           struct vop_generic_args a_head;
           struct nchandle *a_nch;
           struct vnode *a_dvp;
           struct vnode *a_vp;
           struct ucred *a_cred;
   };
   
   /*
    * Warning: a_dvp is only held, not ref'd.  The target must still vget()
    * it.
    */
   struct vop_nsymlink_args {
           struct vop_generic_args a_head;
           struct nchandle *a_nch;
           struct vnode *a_dvp;
           struct vnode **a_vpp;
           struct ucred *a_cred;
           struct vattr *a_vap;
           char *a_target;
   };
   
   /*
    * Warning: a_dvp is only held, not ref'd.  The target must still vget()
    * it.
    */
   struct vop_nwhiteout_args {
           struct vop_generic_args a_head;
           struct nchandle *a_nch;
           struct vnode *a_dvp;
           struct ucred *a_cred;
           int a_flags;
   };
   
   /*
    * Warning: a_dvp is only held, not ref'd.  The target must still vget()
    * it.
    */
   struct vop_nremove_args {
           struct vop_generic_args a_head;
           struct nchandle *a_nch;         /* locked namespace */
           struct vnode *a_dvp;
           struct ucred *a_cred;
   };
   
   /*
    * Warning: a_dvp is only held, not ref'd.  The target must still vget()
    * it.
    */
   struct vop_nrmdir_args {
           struct vop_generic_args a_head;
           struct nchandle *a_nch;         /* locked namespace */
           struct vnode *a_dvp;
           struct ucred *a_cred;
   };
   
   /*
    * Warning: a_fdvp and a_tdvp are only held, not ref'd.  The target must
    * still vget() it.
    */
   struct vop_nrename_args {
           struct vop_generic_args a_head;
           struct nchandle *a_fnch;                /* locked namespace / from */
           struct nchandle *a_tnch;                /* locked namespace / to */
           struct vnode *a_fdvp;
           struct vnode *a_tdvp;
           struct ucred *a_cred;
   };
   
   /*
    * This structure is the post-compiled VOP operations vector.  vop_ops are
    * typically per-mount entities.  The first section is used by our vop_*()
    * function wrappers to implement hooks for per-mount management functions
    * such as journaling and cache coherency protocols.  The second section is
    * the function dispatch for the VFSs.  The functions are supposed to run
    * in the context of the VFS's thread (if it has one) and should not be 
    * directly called from random kernel code.  Note that VOCALL()s are direct
    * calls used for chaining vop_ops structures from a VFS context.
    */
   struct vop_ops {
           struct {
                   struct mount    *vv_mount;
           } head;
   
   #define vop_ops_first_field     vop_default
           int     (*vop_default)(struct vop_generic_args *);
           int     (*vop_unused11)(void *);
           int     (*vop_old_lookup)(struct vop_old_lookup_args *);
           int     (*vop_unused03)(void *);
           int     (*vop_old_create)(struct vop_old_create_args *);
           int     (*vop_old_whiteout)(struct vop_old_whiteout_args *);
           int     (*vop_old_mknod)(struct vop_old_mknod_args *);
           int     (*vop_open)(struct vop_open_args *);
           int     (*vop_close)(struct vop_close_args *);
           int     (*vop_access)(struct vop_access_args *);
           int     (*vop_getattr)(struct vop_getattr_args *);
           int     (*vop_setattr)(struct vop_setattr_args *);
           int     (*vop_read)(struct vop_read_args *);
           int     (*vop_write)(struct vop_write_args *);
           int     (*vop_unused04)(void *);
           int     (*vop_ioctl)(struct vop_ioctl_args *);
           int     (*vop_poll)(struct vop_poll_args *);
           int     (*vop_kqfilter)(struct vop_kqfilter_args *);
           int     (*vop_unused01)(void *);        /* was vop_revoke */
           int     (*vop_mmap)(struct vop_mmap_args *);
           int     (*vop_fsync)(struct vop_fsync_args *);
           int     (*vop_old_remove)(struct vop_old_remove_args *);
           int     (*vop_old_link)(struct vop_old_link_args *);
           int     (*vop_old_rename)(struct vop_old_rename_args *);
           int     (*vop_old_mkdir)(struct vop_old_mkdir_args *);
           int     (*vop_old_rmdir)(struct vop_old_rmdir_args *);
           int     (*vop_old_symlink)(struct vop_old_symlink_args *);
           int     (*vop_readdir)(struct vop_readdir_args *);
           int     (*vop_readlink)(struct vop_readlink_args *);
           int     (*vop_inactive)(struct vop_inactive_args *);
           int     (*vop_reclaim)(struct vop_reclaim_args *);
           int     (*vop_unused09)(void *);
           int     (*vop_unused10)(void *);
           int     (*vop_bmap)(struct vop_bmap_args *);
           int     (*vop_strategy)(struct vop_strategy_args *);
           int     (*vop_print)(struct vop_print_args *);
           int     (*vop_pathconf)(struct vop_pathconf_args *);
           int     (*vop_advlock)(struct vop_advlock_args *);
           int     (*vop_balloc)(struct vop_balloc_args *);
           int     (*vop_reallocblks)(struct vop_reallocblks_args *);
           int     (*vop_getpages)(struct vop_getpages_args *);
           int     (*vop_putpages)(struct vop_putpages_args *);
           int     (*vop_freeblks)(struct vop_freeblks_args *);
           int     (*vop_unused05)(void *);
           int     (*vop_getacl)(struct vop_getacl_args *);
           int     (*vop_setacl)(struct vop_setacl_args *);
           int     (*vop_aclcheck)(struct vop_aclcheck_args *);
           int     (*vop_getextattr)(struct vop_getextattr_args *);
           int     (*vop_setextattr)(struct vop_setextattr_args *);
           int     (*vop_unused06)(void *);
           int     (*vop_unused07)(void *);
           int     (*vop_unused08)(void *);
           int     (*vop_mountctl)(struct vop_mountctl_args *);
           int     (*vop_markatime)(struct vop_markatime_args *);
   
           int     (*vop_nresolve)(struct vop_nresolve_args *);
           int     (*vop_nlookupdotdot)(struct vop_nlookupdotdot_args *);
           int     (*vop_ncreate)(struct vop_ncreate_args *);
           int     (*vop_nmkdir)(struct vop_nmkdir_args *);
           int     (*vop_nmknod)(struct vop_nmknod_args *);
           int     (*vop_nlink)(struct vop_nlink_args *);
           int     (*vop_nsymlink)(struct vop_nsymlink_args *);
           int     (*vop_nwhiteout)(struct vop_nwhiteout_args *);
           int     (*vop_nremove)(struct vop_nremove_args *);
           int     (*vop_nrmdir)(struct vop_nrmdir_args *);
           int     (*vop_nrename)(struct vop_nrename_args *);
   #define vop_ops_last_field      vop_nrename
   };
   
   /*
    * vop_mountctl() operations
    */
   #define VFSSET_DETACH           0
   #define VFSSET_ATTACH           1
   
   /*
    * Kernel VOP arguments union, suitable for malloc / embedding in other
    * structures.  The vop_args_union can hold any VOP call argument structure.
    * Note that vu_head is broken out.
    */
   union vop_args_union {
           struct vop_generic_args vu_head;
           struct vop_generic_args vu_default;
           struct vop_old_lookup_args vu_lookup;
           struct vop_old_create_args vu_create;
           struct vop_old_whiteout_args vu_whiteout;
           struct vop_old_mknod_args vu_mknod;
           struct vop_open_args vu_open;
           struct vop_close_args vu_close;
           struct vop_access_args vu_access;
           struct vop_getattr_args vu_getattr;
           struct vop_setattr_args vu_setattr;
           struct vop_read_args vu_read;
           struct vop_write_args vu_write;
           struct vop_ioctl_args vu_ioctl;
           struct vop_poll_args vu_poll;
           struct vop_kqfilter_args vu_kqfilter;
           struct vop_mmap_args vu_mmap;
           struct vop_fsync_args vu_fsync;
           struct vop_old_remove_args vu_remove;
           struct vop_old_link_args vu_link;
           struct vop_old_rename_args vu_rename;
           struct vop_old_mkdir_args vu_mkdir;
           struct vop_old_rmdir_args vu_rmdir;
           struct vop_old_symlink_args vu_symlink;
           struct vop_readdir_args vu_readdir;
           struct vop_readlink_args vu_readlink;
           struct vop_inactive_args vu_inactive;
           struct vop_reclaim_args vu_reclaim;
           struct vop_bmap_args vu_bmap;
           struct vop_strategy_args vu_strategy;
           struct vop_print_args vu_print;
           struct vop_pathconf_args vu_pathconf;
           struct vop_advlock_args vu_advlock;
           struct vop_balloc_args vu_balloc;
           struct vop_reallocblks_args vu_reallocblks;
           struct vop_getpages_args vu_getpages;
           struct vop_putpages_args vu_putpages;
           struct vop_freeblks_args vu_freeblks;
           struct vop_getacl_args vu_getacl;
           struct vop_setacl_args vu_setacl;
           struct vop_aclcheck_args vu_aclcheck;
           struct vop_getextattr_args vu_getextattr;
           struct vop_setextattr_args vu_setextattr;
           struct vop_mountctl_args vu_mountctl;
           struct vop_markatime_args vu_markatime;
   
           struct vop_nresolve_args vu_nresolve;
           struct vop_nlookupdotdot_args vu_nlookupdotdot;
           struct vop_ncreate_args vu_ncreate;
           struct vop_nmkdir_args vu_nmkdir;
           struct vop_nmknod_args vu_nmknod;
           struct vop_nlink_args vu_nlink;
           struct vop_nsymlink_args vu_nsymlink;
           struct vop_nwhiteout_args vu_nwhiteout;
           struct vop_nremove_args vu_nremove;
           struct vop_nrmdir_args vu_nrmdir;
           struct vop_nrename_args vu_nrename;
   };
   
   #ifdef _KERNEL
   
   /*
    * Kernel VOP call wrappers.  These wrappers are responsible for wrapping
    * the arguments in the appropriate VOP arguments structure, sending the
    * message, and waiting for a reply.  All kernel and VFS code should generally
    * call these wrappers rather then attempt to call the operations vector
    * routine directly in order to allow DragonFly to properly wrap the operation
    * in a message and dispatch it to the correct thread.
    */
   int vop_old_lookup(struct vop_ops *ops, struct vnode *dvp, 
                   struct vnode **vpp, struct componentname *cnp);
   int vop_old_create(struct vop_ops *ops, struct vnode *dvp,
                   struct vnode **vpp, struct componentname *cnp,
                   struct vattr *vap);
   int vop_old_whiteout(struct vop_ops *ops, struct vnode *dvp, 
                   struct componentname *cnp, int flags);
   int vop_old_mknod(struct vop_ops *ops, struct vnode *dvp, 
                   struct vnode **vpp, struct componentname *cnp,
                   struct vattr *vap);
   int vop_open(struct vop_ops *ops, struct vnode *vp, int mode,
                   struct ucred *cred, struct file *file);
   int vop_close(struct vop_ops *ops, struct vnode *vp, int fflag);
   int vop_access(struct vop_ops *ops, struct vnode *vp, int mode, int flags,
                   struct ucred *cred);
   int vop_getattr(struct vop_ops *ops, struct vnode *vp, struct vattr *vap);
   int vop_setattr(struct vop_ops *ops, struct vnode *vp, struct vattr *vap,
                   struct ucred *cred);
   int vop_read(struct vop_ops *ops, struct vnode *vp, struct uio *uio,
                   int ioflag, struct ucred *cred);
   int vop_write(struct vop_ops *ops, struct vnode *vp, struct uio *uio,
                   int ioflag, struct ucred *cred);
   int vop_ioctl(struct vop_ops *ops, struct vnode *vp, u_long command,
                   caddr_t data, int fflag, struct ucred *cred,
                   struct sysmsg *msg);
   int vop_poll(struct vop_ops *ops, struct vnode *vp, int events,
                   struct ucred *cred);
   int vop_kqfilter(struct vop_ops *ops, struct vnode *vp, struct knote *kn);
   int vop_mmap(struct vop_ops *ops, struct vnode *vp, int fflags,
                   struct ucred *cred);
   int vop_fsync(struct vop_ops *ops, struct vnode *vp, int waitfor, int flags);
   int vop_old_remove(struct vop_ops *ops, struct vnode *dvp,
                   struct vnode *vp, struct componentname *cnp);
   int vop_old_link(struct vop_ops *ops, struct vnode *tdvp,
                   struct vnode *vp, struct componentname *cnp);
   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);
   int vop_old_mkdir(struct vop_ops *ops, struct vnode *dvp,
                   struct vnode **vpp, struct componentname *cnp,
                   struct vattr *vap);
   int vop_old_rmdir(struct vop_ops *ops, struct vnode *dvp,
                   struct vnode *vp, struct componentname *cnp);
   int vop_old_symlink(struct vop_ops *ops, struct vnode *dvp,
                   struct vnode **vpp, struct componentname *cnp,
                   struct vattr *vap, char *target);
   int vop_readdir(struct vop_ops *ops, struct vnode *vp, struct uio *uio,
                   struct ucred *cred, int *eofflag, 
                   int *ncookies, off_t **cookies);
   int vop_readlink(struct vop_ops *ops, struct vnode *vp, struct uio *uio,
                   struct ucred *cred);
   int vop_inactive(struct vop_ops *ops, struct vnode *vp);
   int vop_reclaim(struct vop_ops *ops, struct vnode *vp);
   int vop_bmap(struct vop_ops *ops, struct vnode *vp, off_t loffset,
                   off_t *doffsetp, int *runp, int *runb, buf_cmd_t cmd);
   int vop_strategy(struct vop_ops *ops, struct vnode *vp, struct bio *bio);
   int vop_print(struct vop_ops *ops, struct vnode *vp);
   int vop_pathconf(struct vop_ops *ops, struct vnode *vp, int name,
                   register_t *retval);
   int vop_advlock(struct vop_ops *ops, struct vnode *vp, caddr_t id, int op,
                   struct flock *fl, int flags);
   int vop_balloc(struct vop_ops *ops, struct vnode *vp, off_t startoffset,
                   int size, struct ucred *cred, int flags,
                   struct buf **bpp);
   int vop_reallocblks(struct vop_ops *ops, struct vnode *vp,
                   struct cluster_save *buflist);
   int vop_getpages(struct vop_ops *ops, struct vnode *vp, struct vm_page **m,
                   int count, int reqpage, vm_ooffset_t offset, int seqaccess);
   int vop_putpages(struct vop_ops *ops, struct vnode *vp, struct vm_page **m,
                   int count, int sync, int *rtvals, vm_ooffset_t offset);
   int vop_freeblks(struct vop_ops *ops, struct vnode *vp,
                   off_t offset, int length);
   int vop_getacl(struct vop_ops *ops, struct vnode *vp, acl_type_t type,
                   struct acl *aclp, struct ucred *cred);
   int vop_setacl(struct vop_ops *ops, struct vnode *vp, acl_type_t type,
                   struct acl *aclp, struct ucred *cred);
   int vop_aclcheck(struct vop_ops *ops, struct vnode *vp, acl_type_t type,
                   struct acl *aclp, struct ucred *cred);
   
   int vop_getextattr(struct vop_ops *ops, struct vnode *vp, int attrnamespace,
                   char *attrname, struct uio *uio, struct ucred *cred);
   int vop_setextattr(struct vop_ops *ops, struct vnode *vp, int attrnamespace,
                   char *attrname, struct uio *uio, struct ucred *cred);
   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);
   int vop_markatime(struct vop_ops *ops, struct vnode *vp, struct ucred *cred);
   int vop_nresolve(struct vop_ops *ops, struct nchandle *nch,
                   struct vnode *dvp, struct ucred *cred);
   int vop_nlookupdotdot(struct vop_ops *ops, struct vnode *dvp,
                   struct vnode **vpp, struct ucred *cred, char **fakename);
   int vop_ncreate(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
                   struct vnode **vpp, struct ucred *cred, struct vattr *vap);
   int vop_nmkdir(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
                   struct vnode **vpp, struct ucred *cred, struct vattr *vap);
   int vop_nmknod(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
                   struct vnode **vpp, struct ucred *cred, struct vattr *vap);
   int vop_nlink(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
                   struct vnode *vp, struct ucred *cred);
   int vop_nsymlink(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
                   struct vnode **vpp, struct ucred *cred,
                   struct vattr *vap, char *target);
   int vop_nwhiteout(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
                   struct ucred *cred, int flags);
   int vop_nremove(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
                   struct ucred *cred);
   int vop_nrmdir(struct vop_ops *ops, struct nchandle *nch, struct vnode *dvp,
                   struct ucred *cred);
   int vop_nrename(struct vop_ops *ops,
                   struct nchandle *fnch, struct nchandle *tnch,
                   struct vnode *fdvp, struct vnode *tdvp,
                   struct ucred *cred);
   
   /*
    * Kernel VOP forwarding wrappers.  These are called when a VFS such as
    * nullfs or unionfs needs to push down into another VFS, changing the 
    * a_ops pointer and consequentially necessitating additional 
    * cache management.
    *
    * Note that this is different from vop_ops chaining within the same
    * filesystem.  When a filesystem chains a vop_ops it just uses VOCALLs.
    */
   int vop_vnoperate_ap(struct vop_generic_args *ap);
   int vop_cache_operate_ap(struct vop_generic_args *ap);
   int vop_journal_operate_ap(struct vop_generic_args *ap);
   int vop_old_lookup_ap(struct vop_old_lookup_args *ap);
   int vop_old_create_ap(struct vop_old_create_args *ap);
   int vop_old_whiteout_ap(struct vop_old_whiteout_args *ap);
   int vop_old_mknod_ap(struct vop_old_mknod_args *ap);
   int vop_open_ap(struct vop_open_args *ap);
   int vop_close_ap(struct vop_close_args *ap);
   int vop_access_ap(struct vop_access_args *ap);
   int vop_getattr_ap(struct vop_getattr_args *ap);
   int vop_setattr_ap(struct vop_setattr_args *ap);
   int vop_read_ap(struct vop_read_args *ap);
   int vop_write_ap(struct vop_write_args *ap);
   int vop_ioctl_ap(struct vop_ioctl_args *ap);
   int vop_poll_ap(struct vop_poll_args *ap);
   int vop_kqfilter_ap(struct vop_kqfilter_args *ap);
   int vop_mmap_ap(struct vop_mmap_args *ap);
   int vop_fsync_ap(struct vop_fsync_args *ap);
   int vop_old_remove_ap(struct vop_old_remove_args *ap);
   int vop_old_link_ap(struct vop_old_link_args *ap);
   int vop_old_rename_ap(struct vop_old_rename_args *ap);
   int vop_old_mkdir_ap(struct vop_old_mkdir_args *ap);
   int vop_old_rmdir_ap(struct vop_old_rmdir_args *ap);
   int vop_old_symlink_ap(struct vop_old_symlink_args *ap);
   int vop_readdir_ap(struct vop_readdir_args *ap);
   int vop_readlink_ap(struct vop_readlink_args *ap);
   int vop_inactive_ap(struct vop_inactive_args *ap);
   int vop_reclaim_ap(struct vop_reclaim_args *ap);
   int vop_bmap_ap(struct vop_bmap_args *ap);
   int vop_strategy_ap(struct vop_strategy_args *ap);
   int vop_print_ap(struct vop_print_args *ap);
   int vop_pathconf_ap(struct vop_pathconf_args *ap);
   int vop_advlock_ap(struct vop_advlock_args *ap);
   int vop_balloc_ap(struct vop_balloc_args *ap);
   int vop_reallocblks_ap(struct vop_reallocblks_args *ap);
   int vop_getpages_ap(struct vop_getpages_args *ap);
   int vop_putpages_ap(struct vop_putpages_args *ap);
   int vop_freeblks_ap(struct vop_freeblks_args *ap);
   int vop_getacl_ap(struct vop_getacl_args *ap);
   int vop_setacl_ap(struct vop_setacl_args *ap);
   int vop_aclcheck_ap(struct vop_aclcheck_args *ap);
   int vop_getextattr_ap(struct vop_getextattr_args *ap);
   int vop_setextattr_ap(struct vop_setextattr_args *ap);
   int vop_mountctl_ap(struct vop_mountctl_args *ap);
   int vop_markatime_ap(struct vop_markatime_args *ap);
   
   int vop_nresolve_ap(struct vop_nresolve_args *ap);
   int vop_nlookupdotdot_ap(struct vop_nlookupdotdot_args *ap);
   int vop_ncreate_ap(struct vop_ncreate_args *ap);
   int vop_nmkdir_ap(struct vop_nmkdir_args *ap);
   int vop_nmknod_ap(struct vop_nmknod_args *ap);
   int vop_nlink_ap(struct vop_nlink_args *ap);
   int vop_nsymlink_ap(struct vop_nsymlink_args *ap);
   int vop_nwhiteout_ap(struct vop_nwhiteout_args *ap);
   int vop_nremove_ap(struct vop_nremove_args *ap);
   int vop_nrmdir_ap(struct vop_nrmdir_args *ap);
   int vop_nrename_ap(struct vop_nrename_args *ap);
   
   /*
    * VOP operations descriptor.  This is used by the vop_ops compiler
    * to convert VFS vector arrays (typically in vfs/blah/blah_vnops.c)
    * into a vop_ops operations vector.
    */
   extern struct syslink_desc vop_default_desc;
   extern struct syslink_desc vop_old_lookup_desc;
   extern struct syslink_desc vop_old_create_desc;
   extern struct syslink_desc vop_old_whiteout_desc;
   extern struct syslink_desc vop_old_mknod_desc;
   extern struct syslink_desc vop_open_desc;
   extern struct syslink_desc vop_close_desc;
   extern struct syslink_desc vop_access_desc;
   extern struct syslink_desc vop_getattr_desc;
   extern struct syslink_desc vop_setattr_desc;
   extern struct syslink_desc vop_read_desc;
   extern struct syslink_desc vop_write_desc;
   extern struct syslink_desc vop_ioctl_desc;
   extern struct syslink_desc vop_poll_desc;
   extern struct syslink_desc vop_kqfilter_desc;
   extern struct syslink_desc vop_mmap_desc;
   extern struct syslink_desc vop_fsync_desc;
   extern struct syslink_desc vop_old_remove_desc;
   extern struct syslink_desc vop_old_link_desc;
   extern struct syslink_desc vop_old_rename_desc;
   extern struct syslink_desc vop_old_mkdir_desc;
   extern struct syslink_desc vop_old_rmdir_desc;
   extern struct syslink_desc vop_old_symlink_desc;
   extern struct syslink_desc vop_readdir_desc;
   extern struct syslink_desc vop_readlink_desc;
   extern struct syslink_desc vop_inactive_desc;
   extern struct syslink_desc vop_reclaim_desc;
   extern struct syslink_desc vop_bmap_desc;
   extern struct syslink_desc vop_strategy_desc;
   extern struct syslink_desc vop_print_desc;
   extern struct syslink_desc vop_pathconf_desc;
   extern struct syslink_desc vop_advlock_desc;
   extern struct syslink_desc vop_balloc_desc;
   extern struct syslink_desc vop_reallocblks_desc;
   extern struct syslink_desc vop_getpages_desc;
   extern struct syslink_desc vop_putpages_desc;
   extern struct syslink_desc vop_freeblks_desc;
   extern struct syslink_desc vop_getacl_desc;
   extern struct syslink_desc vop_setacl_desc;
   extern struct syslink_desc vop_aclcheck_desc;
   extern struct syslink_desc vop_getextattr_desc;
   extern struct syslink_desc vop_setextattr_desc;
   extern struct syslink_desc vop_mountctl_desc;
   extern struct syslink_desc vop_markatime_desc;
   
   extern struct syslink_desc vop_nresolve_desc;
   extern struct syslink_desc vop_nlookupdotdot_desc;
   extern struct syslink_desc vop_ncreate_desc;
   extern struct syslink_desc vop_nmkdir_desc;
   extern struct syslink_desc vop_nmknod_desc;
   extern struct syslink_desc vop_nlink_desc;
   extern struct syslink_desc vop_nsymlink_desc;
   extern struct syslink_desc vop_nwhiteout_desc;
   extern struct syslink_desc vop_nremove_desc;
   extern struct syslink_desc vop_nrmdir_desc;
   extern struct syslink_desc vop_nrename_desc;
   
   #endif
   
   /*
    * VOP_*() convenience macros extract the operations vector and make the
    * vop_*() call.
    */
   #define VOP_OPEN(vp, mode, cred, fp)                    \
           vop_open(*(vp)->v_ops, vp, mode, cred, fp)
   #define VOP_CLOSE(vp, fflag)                            \
           vop_close(*(vp)->v_ops, vp, fflag)
   #define VOP_ACCESS(vp, mode, cred)                      \
           vop_access(*(vp)->v_ops, vp, mode, 0, cred)
   #define VOP_EACCESS(vp, mode, cred)                     \
           vop_access(*(vp)->v_ops, vp, mode, AT_EACCESS, cred)
   #define VOP_ACCESS_FLAGS(vp, mode, flags, cred)         \
           vop_access(*(vp)->v_ops, vp, mode, flags, cred)
   #define VOP_GETATTR(vp, vap)                            \
           vop_getattr(*(vp)->v_ops, vp, vap)
   #define VOP_SETATTR(vp, vap, cred)                      \
           vop_setattr(*(vp)->v_ops, vp, vap, cred)
   #define VOP_READ(vp, uio, ioflag, cred)                 \
           vop_read(*(vp)->v_ops, vp, uio, ioflag, cred)
   #define VOP_WRITE(vp, uio, ioflag, cred)                \
           vop_write(*(vp)->v_ops, vp, uio, ioflag, cred)
  #define VOP_IOCTL(vp, command, data, fflag, cred, msg)  \
          vop_ioctl(*(vp)->v_ops, vp, command, data, fflag, cred, msg)
  #define VOP_POLL(vp, events, cred)                      \
          vop_poll(*(vp)->v_ops, vp, events, cred)
  #define VOP_KQFILTER(vp, kn)                            \
          vop_kqfilter(*(vp)->v_ops, vp, kn)
  #define VOP_MMAP(vp, fflags, cred)                      \
          vop_mmap(*(vp)->v_ops, vp, fflags, cred)
  #define VOP_FSYNC(vp, waitfor, flags)                   \
          vop_fsync(*(vp)->v_ops, vp, waitfor, flags)
  #define VOP_READDIR(vp, uio, cred, eofflag, ncookies, cookies)          \
          vop_readdir(*(vp)->v_ops, vp, uio, cred, eofflag, ncookies, cookies)
  #define VOP_READLINK(vp, uio, cred)                     \
          vop_readlink(*(vp)->v_ops, vp, uio, cred)
  #define VOP_INACTIVE(vp)                                \
          vop_inactive(*(vp)->v_ops, vp)
  #define VOP_RECLAIM(vp)                                 \
          vop_reclaim(*(vp)->v_ops, vp)
  #define VOP_BMAP(vp, loff, doffp, runp, runb, cmd)      \
          vop_bmap(*(vp)->v_ops, vp, loff, doffp, runp, runb, cmd)
  #define VOP_PRINT(vp)                                   \
          vop_print(*(vp)->v_ops, vp)
  #define VOP_PATHCONF(vp, name, retval)                  \
          vop_pathconf(*(vp)->v_ops, vp, name, retval)
  #define VOP_ADVLOCK(vp, id, op, fl, flags)              \
          vop_advlock(*(vp)->v_ops, vp, id, op, fl, flags)
  #define VOP_BALLOC(vp, offset, size, cred, flags, bpp)  \
          vop_balloc(*(vp)->v_ops, vp, offset, size, cred, flags, bpp)
  #define VOP_REALLOCBLKS(vp, buflist)                    \
          vop_reallocblks(*(vp)->v_ops, vp, buflist)
  #define VOP_GETPAGES(vp, m, count, reqpage, off, seqaccess)             \
          vop_getpages(*(vp)->v_ops, vp, m, count, reqpage, off, seqaccess)
  #define VOP_PUTPAGES(vp, m, count, sync, rtvals, off)   \
          vop_putpages(*(vp)->v_ops, vp, m, count, sync, rtvals, off)
  #define VOP_FREEBLKS(vp, offset, length)                \
          vop_freeblks(*(vp)->v_ops, vp, offset, length)
  #define VOP_GETACL(vp, type, aclp, cred)                \
          vop_getacl(*(vp)->v_ops, vp, type, aclp, cred)
  #define VOP_SETACL(vp, type, aclp, cred)                \
          vop_setacl(*(vp)->v_ops, vp, type, aclp, cred)
  #define VOP_ACLCHECK(vp, type, aclp, cred)              \
          vop_aclcheck(*(vp)->v_ops, vp, type, aclp, cred)
  #define VOP_GETEXTATTR(vp, attrnamespace, attrname, uio, cred) \
          vop_getextattr(*(vp)->v_ops, vp, attrnamespace, attrname, uio, cred)
  #define VOP_SETEXTATTR(vp, attrnamespace, attrname, uio, cred)  \
          vop_setextattr(*(vp)->v_ops, vp, attrnamespace, attrname, uio, cred)
  #define VOP_MARKATIME(vp, cred)                 \
          vop_markatime(*(vp)->v_ops, vp, cred)
  /* no VOP_VFSSET() */
  /* VOP_STRATEGY - does not exist, use vn_strategy() */
  
  /*
   * 'OLD' VOP calls.  These calls may only be made by the new API
   * compatibility functions in kern/vfs_default.c.  Attempting to
   * call these functions directly will confuse the namecache.  These
   * calls are deprecated and being removed from the system and from
   * the VFS's.
   */
  #define VOP_OLD_LOOKUP(dvp, vpp, cnp)                   \
          vop_old_lookup(*(dvp)->v_ops, dvp, vpp, cnp)
  #define VOP_OLD_CREATE(dvp, vpp, cnp, vap)              \
          vop_old_create(*(dvp)->v_ops, dvp, vpp, cnp, vap)
  #define VOP_OLD_MKDIR(dvp, vpp, cnp, vap)               \
          vop_old_mkdir(*(dvp)->v_ops, dvp, vpp, cnp, vap)
  #define VOP_OLD_MKNOD(dvp, vpp, cnp, vap)               \
          vop_old_mknod(*(dvp)->v_ops, dvp, vpp, cnp, vap)
  #define VOP_OLD_LINK(tdvp, vp, cnp)                     \
          vop_old_link(*(tdvp)->v_ops, tdvp, vp, cnp)
  #define VOP_OLD_SYMLINK(dvp, vpp, cnp, vap, target)     \
          vop_old_symlink(*(dvp)->v_ops, dvp, vpp, cnp, vap, target)
  #define VOP_OLD_WHITEOUT(dvp, cnp, flags)               \
          vop_old_whiteout(*(dvp)->v_ops, dvp, cnp, flags)
  #define VOP_OLD_RENAME(fdvp, fvp, fcnp, tdvp, tvp, tcnp) \
          vop_old_rename(*(fdvp)->v_ops, fdvp, fvp, fcnp, tdvp, tvp, tcnp)
  #define VOP_OLD_RMDIR(dvp, vp, cnp)                     \
          vop_old_rmdir(*(dvp)->v_ops, dvp, vp, cnp)
  #define VOP_OLD_REMOVE(dvp, vp, cnp)                    \
          vop_old_remove(*(dvp)->v_ops, dvp, vp, cnp)
  
  /*
   * 'NEW' VOP calls.  These calls use namespaces as an operational basis
   * rather then vnodes and replace the OLD calls.   Eventually all VFS's
   * will support these calls.  Those that do not fall through to compatibility
   * code in kern/vfs_default which does the magic required to call the old
   * routines.
   */
  #define VOP_NRESOLVE(nch, dvp, cred)                    \
          vop_nresolve((nch)->mount->mnt_vn_use_ops, nch, dvp, cred)
  #define VOP_NLOOKUPDOTDOT(dvp, vpp, cred, fakename)     \
          vop_nlookupdotdot(*(dvp)->v_ops, dvp, vpp, cred, fakename)
  #define VOP_NCREATE(nch, dvp, vpp, cred, vap)           \
          vop_ncreate((nch)->mount->mnt_vn_use_ops, nch, dvp, vpp, cred, vap)
  #define VOP_NMKDIR(nch, dvp, vpp, cred, vap)            \
          vop_nmkdir((nch)->mount->mnt_vn_use_ops, nch, dvp, vpp, cred, vap)
  #define VOP_NMKNOD(nch, dvp, vpp, cred, vap)            \
          vop_nmknod((nch)->mount->mnt_vn_use_ops, nch, dvp, vpp, cred, vap)
  #define VOP_NLINK(nch, dvp, vp, cred)                   \
          vop_nlink((nch)->mount->mnt_vn_use_ops, nch, dvp, vp, cred)
  #define VOP_NSYMLINK(nch, dvp, vpp, cred, vap, target)  \
          vop_nsymlink((nch)->mount->mnt_vn_use_ops, nch, dvp, vpp, cred, vap, target)
  #define VOP_NWHITEOUT(nch, dvp, cred, flags)            \
          vop_nwhiteout((nch)->mount->mnt_vn_use_ops, nch, dvp, cred, flags)
  #define VOP_NRENAME(fnch, tnch, fdvp, tdvp, cred)               \
          vop_nrename((fnch)->mount->mnt_vn_use_ops, fnch, tnch, fdvp, tdvp, cred)
  #define VOP_NRMDIR(nch, dvp, cred)                      \
          vop_nrmdir((nch)->mount->mnt_vn_use_ops, nch, dvp, cred)
  #define VOP_NREMOVE(nch, dvp, cred)                     \
          vop_nremove((nch)->mount->mnt_vn_use_ops, nch, dvp, cred)
  
  #endif
  

Cache object: 2fbf7ffcfaa1c0a5b0c97f3404a0ae2b