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 /* 28 * Copyright 2018 Nexenta Systems, Inc. 29 */ 30 31 #ifndef _SHAREFS_SHAREFS_H 32 #define _SHAREFS_SHAREFS_H 33 34 /* 35 * This header provides service for the sharefs module. 36 */ 37 38 #include <sys/modctl.h> 39 #include <sys/vfs.h> 40 #include <sys/vnode.h> 41 #include <sys/gfs.h> 42 #include <sharefs/share.h> 43 #include <sharefs/sharetab.h> 44 45 #ifdef __cplusplus 46 extern "C" { 47 #endif 48 49 #define SHAREFS_ROOT "/etc/dfs" 50 #define SHAREFS_BASE "sharetab" 51 52 /* 53 * Lengths of strings. 54 */ 55 typedef struct sharefs_lens { 56 int shl_path; 57 int shl_res; 58 int shl_fstype; 59 int shl_opts; 60 int shl_descr; 61 } sharefs_lens_t; 62 63 /* 64 * VFS data object 65 */ 66 typedef struct sharefs_vfs { 67 vnode_t *sharefs_vfs_root; 68 } sharefs_vfs_t; 69 70 #define SHAREFS_NAME_MAX MAXNAMELEN 71 72 typedef struct sharetab_globals { 73 /* 74 * The lock ordering whenever sharefs_lock and sharetab_lock both 75 * need to be held is: sharefs_lock and then sharetab_lock. 76 */ 77 krwlock_t sharefs_lock; /* lock for the vnode ops */ 78 sharetab_t *sharefs_sharetab; /* The sharetab. */ 79 80 uint_t sharetab_count; /* How many shares? */ 81 krwlock_t sharetab_lock; /* lock for the cached sharetab */ 82 size_t sharetab_size; /* How big is the sharetab file? */ 83 84 timestruc_t sharetab_mtime; /* Last mod to sharetab */ 85 timestruc_t sharetab_snap_time; /* Last snap */ 86 uint_t sharetab_generation; /* Which copy is it? */ 87 } sharetab_globals_t; 88 89 #define SHAREFS_INO_FILE 0x80 90 91 extern vnode_t *sharefs_create_root_file(vfs_t *); 92 extern sharetab_globals_t *sharetab_get_globals(zone_t *zone); 93 94 /* 95 * Sharetab file 96 * 97 * Note that even though the sharetab code does not explictly 98 * use 'sharefs_file', it is required by GFS that the first 99 * field of the private data be a gfs_file_t. 100 */ 101 typedef struct shnode_t { 102 gfs_file_t sharefs_file; /* gfs file */ 103 char *sharefs_snap; /* snapshot of the share */ 104 size_t sharefs_size; /* size of the snapshot */ 105 uint_t sharefs_count; /* number of shares */ 106 uint_t sharefs_refs; /* reference count */ 107 uint_t sharefs_real_vp; /* Are we a real or snap */ 108 uint_t sharefs_generation; /* Which copy are we? */ 109 timestruc_t sharefs_snap_time; /* When were we modded? */ 110 } shnode_t; 111 112 /* 113 * Some conversion macros: 114 */ 115 #define VTOSH(vp) ((shnode_t *)((vp)->v_data)) 116 117 extern const fs_operation_def_t sharefs_tops_data[]; 118 extern vnodeops_t *sharefs_ops_data; 119 120 extern void sharefs_data_init(void); 121 122 extern void sharefs_sharetab_init(void); 123 124 #ifdef __cplusplus 125 } 126 #endif 127 128 #endif /* !_SHAREFS_SHAREFS_H */ 129