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      1 /* $NetBSD: vnode.h,v 1.6 2021/09/17 22:41:48 christos 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 #include <sys/queue.h>
     32 
     33 #define VNODE_HASH_MAX   1024 /* Must be a PO2 */
     34 #define VNODE_CACHE_SIZE 1024 /* Need not be a PO2 */
     35 
     36 LIST_HEAD(ubuflists, ubuf);
     37 LIST_HEAD(uvnodelst, uvnode);
     38 LIST_HEAD(vgrlst,    vget_reg);
     39 
     40 struct uvnode {
     41 	int v_fd;
     42 	int (*v_strategy_op) (struct ubuf *);
     43 	int (*v_bwrite_op) (struct ubuf *);
     44 	int (*v_bmap_op) (struct uvnode *, daddr_t, daddr_t *);
     45 	u_int32_t v_uflag;
     46 	void *v_fs;
     47 	void *v_data;
     48 #undef v_usecount
     49 	int v_usecount;
     50 	struct ubuflists v_cleanblkhd;	/* clean blocklist head */
     51 	struct ubuflists v_dirtyblkhd;	/* dirty blocklist head */
     52 	LIST_ENTRY(uvnode) v_mntvnodes;
     53 	LIST_ENTRY(uvnode) v_getvnodes;
     54 };
     55 
     56 struct vget_reg {
     57 	void *vgr_fs;
     58 	struct uvnode *(*vgr_func) (void *, ino_t);
     59 	LIST_ENTRY(vget_reg) vgr_list;
     60 };
     61 
     62 #define VOP_STRATEGY(bp)          ((bp)->b_vp->v_strategy_op(bp))
     63 #define VOP_BWRITE(bp)            ((bp)->b_vp->v_bwrite_op(bp))
     64 #define VOP_BMAP(vp, lbn, daddrp) ((vp)->v_bmap_op((vp), (lbn), (daddrp)))
     65 
     66 extern int fsdirty;
     67 extern struct uvnodelst vnodelist;
     68 
     69 int raw_vop_strategy(struct ubuf *);
     70 int raw_vop_bwrite(struct ubuf *);
     71 int raw_vop_bmap(struct uvnode *, daddr_t, daddr_t *);
     72 
     73 void vnode_destroy(struct uvnode *);
     74 struct uvnode *vget(void *, ino_t);
     75 void register_vget(void *, struct uvnode *(*)(void *, ino_t));
     76 void vfs_init(void);
     77