1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* 28 * Loop-back file information structure. 29 */ 30 31 #ifndef _SYS_FS_LOFS_NODE_H 32 #define _SYS_FS_LOFS_NODE_H 33 34 #pragma ident "%Z%%M% %I% %E% SMI" 35 36 #include <sys/fs/lofs_info.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 /* 43 * The lnode is the "inode" for loop-back files. It contains 44 * all the information necessary to handle loop-back file on the 45 * client side. 46 */ 47 typedef struct lnode { 48 struct lnode *lo_next; /* link for hash chain */ 49 struct vnode *lo_vp; /* pointer to real vnode */ 50 uint_t lo_looping; /* looping flags (see below) */ 51 struct vnode *lo_vnode; /* place holder vnode for file */ 52 } lnode_t; 53 54 /* 55 * Flags used when looping has been detected. 56 */ 57 #define LO_LOOPING 0x01 /* Looping detected */ 58 #define LO_AUTOLOOP 0x02 /* Autonode looping detected */ 59 60 /* 61 * Flag passed to makelonode(). 62 */ 63 #define LOF_FORCE 0x1 /* Force creation of new lnode */ 64 65 /* 66 * Convert between vnode and lnode 67 */ 68 #define ltov(lp) (((lp)->lo_vnode)) 69 #define vtol(vp) ((struct lnode *)((vp)->v_data)) 70 #define realvp(vp) (vtol(vp)->lo_vp) 71 72 #ifdef _KERNEL 73 extern vnode_t *makelonode(vnode_t *, struct loinfo *, int); 74 extern void freelonode(lnode_t *); 75 76 extern struct vnode kvp; 77 #endif /* _KERNEL */ 78 79 #ifdef __cplusplus 80 } 81 #endif 82 83 #endif /* _SYS_FS_LOFS_NODE_H */ 84