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 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _LX_AUTOFS_IMPL_H 28 #define _LX_AUTOFS_IMPL_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #ifdef __cplusplus 33 extern "C" { 34 #endif 35 36 #include <sys/file.h> 37 #include <sys/id_space.h> 38 #include <sys/modhash.h> 39 #include <sys/vnode.h> 40 41 #include <sys/lx_autofs.h> 42 43 /* 44 * Space key. 45 * Used to persist data across lx_autofs filesystem module unloads. 46 */ 47 #define LX_AUTOFS_SPACE_KEY_UDEV LX_AUTOFS_NAME "_udev" 48 49 /* 50 * Name of the backing store directory. 51 */ 52 #define LX_AUTOFS_BS_DIR "." LX_AUTOFS_NAME 53 54 #define LX_AUTOFS_VFS_ID_HASH_SIZE 15 55 #define LX_AUTOFS_VFS_PATH_HASH_SIZE 15 56 #define LX_AUTOFS_VFS_VN_HASH_SIZE 15 57 58 /* 59 * VFS data object. 60 */ 61 typedef struct lx_autofs_vfs { 62 /* Info about the underlying filesystem and backing store. */ 63 vnode_t *lav_mvp; 64 char *lav_bs_name; 65 vnode_t *lav_bs_vp; 66 67 /* Info about the automounter process managing this filesystem. */ 68 int lav_fd; 69 pid_t lav_pgrp; 70 file_t *lav_fifo_wr; 71 file_t *lav_fifo_rd; 72 73 /* Each automount requests needs a unique id. */ 74 id_space_t *lav_ids; 75 76 /* All remaining structure members are protected by lav_lock. */ 77 kmutex_t lav_lock; 78 79 /* Hashes to keep track of outstanding automounter requests. */ 80 mod_hash_t *lav_path_hash; 81 mod_hash_t *lav_id_hash; 82 83 /* We need to keep track of all our vnodes. */ 84 vnode_t *lav_root; 85 mod_hash_t *lav_vn_hash; 86 } lx_autofs_vfs_t; 87 88 /* 89 * Structure to keep track of requests sent to the automounter. 90 */ 91 typedef struct lx_autofs_lookup_req { 92 /* Packet that gets sent to the automounter. */ 93 lx_autofs_pkt_t lalr_pkt; 94 95 /* Reference count. Always updated atomically. */ 96 uint_t lalr_ref; 97 98 /* 99 * Fields to keep track and sync threads waiting on a lookup. 100 * Fields are protected by lalr_lock. 101 */ 102 kmutex_t lalr_lock; 103 kcondvar_t lalr_cv; 104 int lalr_complete; 105 } lx_autofs_lookup_req_t; 106 107 /* 108 * Generic stack structure. 109 */ 110 typedef struct stack_elem { 111 list_node_t se_list; 112 caddr_t se_ptr1; 113 caddr_t se_ptr2; 114 caddr_t se_ptr3; 115 } stack_elem_t; 116 117 #ifdef __cplusplus 118 } 119 #endif 120 121 #endif /* _LX_AUTOFS_IMPL_H */