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 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SHAREFS_SHAREFS_H 28 #define _SHAREFS_SHAREFS_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 /* 33 * This header provides service for the sharefs module. 34 */ 35 36 #include <sys/modctl.h> 37 #include <sys/vfs.h> 38 #include <sys/vnode.h> 39 #include <sys/gfs.h> 40 #include <sharefs/share.h> 41 #include <sharefs/sharetab.h> 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 #define SHAREFS_ROOT "/etc/dfs" 48 #define SHAREFS_BASE "sharetab" 49 50 /* 51 * Lengths of strings. 52 */ 53 typedef struct sharefs_lens { 54 int shl_path; 55 int shl_res; 56 int shl_fstype; 57 int shl_opts; 58 int shl_descr; 59 } sharefs_lens_t; 60 61 /* 62 * VFS data object 63 */ 64 typedef struct sharefs_vfs { 65 vnode_t *sharefs_vfs_root; 66 } sharefs_vfs_t; 67 68 #define SHAREFS_NAME_MAX MAXNAMELEN 69 70 /* 71 * The lock ordering whenever sharefs_lock and sharetab_lock both 72 * need to be held is: sharefs_lock and then sharetab_lock. 73 */ 74 extern krwlock_t sharefs_lock; /* lock for the vnode ops */ 75 extern sharetab_t *sharefs_sharetab; /* The sharetab. */ 76 77 extern uint_t sharetab_count; /* How many shares? */ 78 extern krwlock_t sharetab_lock; /* lock for the cached sharetab */ 79 extern size_t sharetab_size; /* How big is the sharetab file? */ 80 81 extern timestruc_t sharetab_mtime; /* Last mod to sharetab */ 82 extern timestruc_t sharetab_snap_time; /* Last snap */ 83 extern uint_t sharetab_generation; /* Which copy is it? */ 84 85 #define SHAREFS_INO_FILE 0x80 86 87 extern vnode_t *sharefs_create_root_file(vfs_t *); 88 89 /* 90 * Sharetab file 91 * 92 * Note that even though the sharetab code does not explictly 93 * use 'sharefs_file', it is required by GFS that the first 94 * field of the private data be a gfs_file_t. 95 */ 96 typedef struct shnode_t { 97 gfs_file_t sharefs_file; /* gfs file */ 98 char *sharefs_snap; /* snapshot of the share */ 99 size_t sharefs_size; /* size of the snapshot */ 100 uint_t sharefs_count; /* number of shares */ 101 uint_t sharefs_refs; /* reference count */ 102 uint_t sharefs_real_vp; /* Are we a real or snap */ 103 uint_t sharefs_generation; /* Which copy are we? */ 104 timestruc_t sharefs_snap_time; /* When were we modded? */ 105 } shnode_t; 106 107 /* 108 * Some conversion macros: 109 */ 110 #define VTOSH(vp) ((shnode_t *)((vp)->v_data)) 111 112 extern const fs_operation_def_t sharefs_tops_data[]; 113 extern vnodeops_t *sharefs_ops_data; 114 115 extern void sharefs_data_init(void); 116 117 extern void sharefs_sharetab_init(void); 118 119 #ifdef __cplusplus 120 } 121 #endif 122 123 #endif /* !_SHAREFS_SHAREFS_H */ 124