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vnode.h revision 1.3.10.1 
      1 /* $NetBSD: vnode.h,v 1.3.10.1 2008/05/18 12:30:51 yamt Exp $ */
      2 /*-
      3  * Copyright (c) 2003 The NetBSD Foundation, Inc.
      4  * All rights reserved.
      5  *
      6  * This code is derived from software contributed to The NetBSD Foundation
      7  * by Konrad E. Schroder <perseant (at) hhhh.org>.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     19  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     20  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     21  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     22  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     23  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     24  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     25  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     26  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     27  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     28  * POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #define VNODE_HASH_MAX   1024 /* Must be a PO2 */
     32 #define VNODE_CACHE_SIZE 1024 /* Need not be a PO2 */
     33 
     34 LIST_HEAD(ubuflists, ubuf);
     35 LIST_HEAD(uvnodelst, uvnode);
     36 LIST_HEAD(vgrlst,    vget_reg);
     37 
     38 struct uvnode {
     39 	int v_fd;
     40 	int (*v_strategy_op) (struct ubuf *);
     41 	int (*v_bwrite_op) (struct ubuf *);
     42 	int (*v_bmap_op) (struct uvnode *, daddr_t, daddr_t *);
     43 	u_int32_t v_uflag;
     44 	void *v_fs;
     45 	void *v_data;
     46 #undef v_usecount
     47 	int v_usecount;
     48 	struct ubuflists v_cleanblkhd;	/* clean blocklist head */
     49 	struct ubuflists v_dirtyblkhd;	/* dirty blocklist head */
     50 	LIST_ENTRY(uvnode) v_mntvnodes;
     51 	LIST_ENTRY(uvnode) v_getvnodes;
     52 };
     53 
     54 struct vget_reg {
     55 	void *vgr_fs;
     56 	struct uvnode *(*vgr_func) (void *, ino_t);
     57 	LIST_ENTRY(vget_reg) vgr_list;
     58 };
     59 
     60 #define VOP_STRATEGY(bp)          ((bp)->b_vp->v_strategy_op(bp))
     61 #define VOP_BWRITE(bp)            ((bp)->b_vp->v_bwrite_op(bp))
     62 #define VOP_BMAP(vp, lbn, daddrp) ((vp)->v_bmap_op((vp), (lbn), (daddrp)))
     63 
     64 extern int fsdirty;
     65 extern struct uvnodelst vnodelist;
     66 
     67 int raw_vop_strategy(struct ubuf *);
     68 int raw_vop_bwrite(struct ubuf *);
     69 int raw_vop_bmap(struct uvnode *, daddr_t, daddr_t *);
     70 
     71 void vnode_destroy(struct uvnode *);
     72 struct uvnode *vget(void *, ino_t);
     73 void register_vget(void *, struct uvnode *(void *, ino_t));
     74 void vfs_init(void);
     75