sys/vfs/userfs/userfs.h

   1 /*
   2  * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sys/vfs/userfs/userfs.h,v 1.2 2007/09/07 21:42:59 dillon Exp $
  35  */
  36
  37 #include <sys/syslink_msg.h>
  38 #include <sys/tree.h>
  39 #ifdef _KERNEL
  40 #include <sys/lockf.h>
  41 #endif
  42
  43 #include <sys/syslink_msg2.h>
  44
  45 /*
  46  * userfs mount information structure, passed to mount(2).  The userfs
  47  * will return a syslink messaging descriptor representing the user<->kernel
  48  * fs interface.  The user filesystem usually creates multiple LWPs to
  49  * be able to handle requests in parallel.
  50  */
  51 struct userfs_mount_info {
  52         int     cfd;            /* returned syslink descriptor */
  53         void    *mmbase;        /* FUTURE - memory mapped BIO interface */
  54         size_t  mmsize;         /* FUTURE - memory mapped BIO interface */
  55         ino_t   root_ino;       /* root inode information */
  56         void    *root_uptr;     /* root inode information */
  57 };
  58
  59 #define USERFS_BSIZE    16384   /* used to break uio's into bufs */
  60 #define USERFS_BMASK    (USERFS_BSIZE-1)
  61
  62 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
  63
  64 struct userfs_ino_rb_tree;
  65 struct user_inode;
  66 RB_PROTOTYPE2(userfs_ino_rb_tree, user_inode, rb_node,
  67              userfs_ino_rb_compare, ino_t);
  68
  69 struct user_mount {
  70         struct sldesc *sldesc;  /* syslink communications descriptor */
  71         struct vnode *rootvp;   /* root vnode for filesystem */
  72         struct mount *mp;
  73         RB_HEAD(userfs_ino_rb_tree, user_inode) rb_root;
  74 };
  75
  76 struct user_inode {
  77         RB_ENTRY(user_inode) rb_node;
  78         struct user_mount *ump;
  79         struct vnode *vp;
  80         off_t   filesize;       /* current file size */
  81         void    *uptr;          /* userland supplied pointer */
  82         ino_t   inum;           /* inode number */
  83         struct lockf lockf;
  84 };
  85
  86 #endif
  87
  88 #if defined(_KERNEL)
  89
  90 extern struct vop_ops userfs_vnode_vops;
  91 int     user_vop_inactive(struct vop_inactive_args *);
  92 int     user_vop_reclaim(struct vop_reclaim_args *);
  93 int     user_vfs_vget(struct mount *mp, struct vnode *dvp,
  94                         ino_t ino, struct vnode **vpp);
  95
  96 void    user_elm_push_vnode(syslink_elm_t par, struct vnode *vp);
  97 void    user_elm_push_offset(syslink_elm_t par, off_t offset);
  98 void    user_elm_push_bio(syslink_elm_t par, int cmd, int bcount);
  99 void    user_elm_push_mode(struct syslink_elm *par, mode_t mode);
 100 void    user_elm_push_cred(struct syslink_elm *par, struct ucred *cred);
 101 void    user_elm_push_vattr(struct syslink_elm *par, struct vattr *vattr);
 102 void    user_elm_push_nch(struct syslink_elm *par, struct nchandle *nch);
 103
 104
 105 int     user_getnewvnode(struct mount *mp, struct vnode **vpp, ino_t ino,
 106                          enum vtype vtype);
 107
 108 int     user_elm_parse_vattr(struct syslink_elm *par, struct vattr *vat);
 109
 110 #endif
 111