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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* 27 * Loop-back file information structure. 28 */ 29 30 #ifndef _SYS_FS_LOFS_NODE_H 31 #define _SYS_FS_LOFS_NODE_H 32 33 #include <sys/fs/lofs_info.h> 34 35 #ifdef __cplusplus 36 extern "C" { 37 #endif 38 39 /* 40 * The lnode is the "inode" for loop-back files. It contains 41 * all the information necessary to handle loop-back file on the 42 * client side. 43 */ 44 typedef struct lnode { 45 struct lnode *lo_next; /* link for hash chain */ 46 struct vnode *lo_vp; /* pointer to real vnode */ 47 uint_t lo_looping; /* looping flags (see below) */ 48 struct vnode *lo_vnode; /* place holder vnode for file */ 49 } lnode_t; 50 51 /* 52 * Flags used when looping has been detected. 53 */ 54 #define LO_LOOPING 0x01 /* Looping detected */ 55 #define LO_AUTOLOOP 0x02 /* Autonode looping detected */ 56 57 /* 58 * Flag passed to makelonode(). 59 */ 60 #define LOF_FORCE 0x1 /* Force creation of new lnode */ 61 62 /* 63 * Convert between vnode and lnode 64 */ 65 #define ltov(lp) (((lp)->lo_vnode)) 66 #define vtol(vp) ((struct lnode *)((vp)->v_data)) 67 #define realvp(vp) (vtol(vp)->lo_vp) 68 69 #ifdef _KERNEL 70 extern vnode_t *makelonode(vnode_t *, struct loinfo *, int); 71 extern void freelonode(lnode_t *); 72 #endif /* _KERNEL */ 73 74 #ifdef __cplusplus 75 } 76 #endif 77 78 #endif /* _SYS_FS_LOFS_NODE_H */ 79