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vnode.h revision 1.3 
      1 /* $NetBSD: vnode.h,v 1.3 2007/10/10 20:42:20 ad 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  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed by the NetBSD
     20  *	Foundation, Inc. and its contributors.
     21  * 4. Neither the name of The NetBSD Foundation nor the names of its
     22  *    contributors may be used to endorse or promote products derived
     23  *    from this software without specific prior written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     26  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     27  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     28  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     29  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     30  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     31  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     33  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     34  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     35  * POSSIBILITY OF SUCH DAMAGE.
     36  */
     37 
     38 #define VNODE_HASH_MAX   1024 /* Must be a PO2 */
     39 #define VNODE_CACHE_SIZE 1024 /* Need not be a PO2 */
     40 
     41 LIST_HEAD(ubuflists, ubuf);
     42 LIST_HEAD(uvnodelst, uvnode);
     43 LIST_HEAD(vgrlst,    vget_reg);
     44 
     45 struct uvnode {
     46 	int v_fd;
     47 	int (*v_strategy_op) (struct ubuf *);
     48 	int (*v_bwrite_op) (struct ubuf *);
     49 	int (*v_bmap_op) (struct uvnode *, daddr_t, daddr_t *);
     50 	u_int32_t v_uflag;
     51 	void *v_fs;
     52 	void *v_data;
     53 #undef v_usecount
     54 	int v_usecount;
     55 	struct ubuflists v_cleanblkhd;	/* clean blocklist head */
     56 	struct ubuflists v_dirtyblkhd;	/* dirty blocklist head */
     57 	LIST_ENTRY(uvnode) v_mntvnodes;
     58 	LIST_ENTRY(uvnode) v_getvnodes;
     59 };
     60 
     61 struct vget_reg {
     62 	void *vgr_fs;
     63 	struct uvnode *(*vgr_func) (void *, ino_t);
     64 	LIST_ENTRY(vget_reg) vgr_list;
     65 };
     66 
     67 #define VOP_STRATEGY(bp)          ((bp)->b_vp->v_strategy_op(bp))
     68 #define VOP_BWRITE(bp)            ((bp)->b_vp->v_bwrite_op(bp))
     69 #define VOP_BMAP(vp, lbn, daddrp) ((vp)->v_bmap_op((vp), (lbn), (daddrp)))
     70 
     71 extern int fsdirty;
     72 extern struct uvnodelst vnodelist;
     73 
     74 int raw_vop_strategy(struct ubuf *);
     75 int raw_vop_bwrite(struct ubuf *);
     76 int raw_vop_bmap(struct uvnode *, daddr_t, daddr_t *);
     77 
     78 void vnode_destroy(struct uvnode *);
     79 struct uvnode *vget(void *, ino_t);
     80 void register_vget(void *, struct uvnode *(void *, ino_t));
     81 void vfs_init(void);
     82