specdev.h revision 1.34
1 /* $NetBSD: specdev.h,v 1.34 2008/01/24 17:32:55 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2008 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the NetBSD 18 * Foundation, Inc. and its contributors. 19 * 4. Neither the name of The NetBSD Foundation nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* 37 * Copyright (c) 1990, 1993 38 * The Regents of the University of California. All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 * 64 * @(#)specdev.h 8.6 (Berkeley) 5/21/95 65 */ 66 67 #ifndef _MISCFS_SPECFS_SPECDEV_H_ 68 #define _MISCFS_SPECFS_SPECDEV_H_ 69 70 #include <sys/mutex.h> 71 #include <sys/vnode.h> 72 73 typedef struct specnode { 74 vnode_t *sn_next; 75 struct specdev *sn_dev; 76 u_int sn_opencnt; 77 dev_t sn_rdev; 78 bool sn_gone; 79 } specnode_t; 80 81 typedef struct specdev { 82 struct mount *sd_mountpoint; 83 struct lockf *sd_lockf; 84 vnode_t *sd_bdevvp; 85 u_int sd_opencnt; 86 u_int sd_refcnt; 87 dev_t sd_rdev; 88 } specdev_t; 89 90 /* 91 * Exported shorthand 92 */ 93 #define v_specnext v_specnode->sn_next 94 #define v_rdev v_specnode->sn_rdev 95 #define v_speclockf v_specnode->sn_dev->sd_lockf 96 #define v_specmountpoint v_specnode->sn_dev->sd_mountpoint 97 98 /* 99 * Special device management 100 */ 101 #define SPECHSZ 64 102 #if ((SPECHSZ&(SPECHSZ-1)) == 0) 103 #define SPECHASH(rdev) (((rdev>>5)+(rdev))&(SPECHSZ-1)) 104 #else 105 #define SPECHASH(rdev) (((unsigned)((rdev>>5)+(rdev)))%SPECHSZ) 106 #endif 107 108 extern vnode_t *specfs_hash[SPECHSZ]; 109 extern kmutex_t specfs_lock; 110 111 void spec_node_init(vnode_t *, dev_t); 112 void spec_node_destroy(vnode_t *); 113 void spec_node_revoke(vnode_t *); 114 115 /* 116 * Prototypes for special file operations on vnodes. 117 */ 118 extern int (**spec_vnodeop_p)(void *); 119 struct nameidata; 120 struct componentname; 121 struct flock; 122 struct buf; 123 struct uio; 124 125 int spec_lookup(void *); 126 #define spec_create genfs_badop 127 #define spec_mknod genfs_badop 128 int spec_open(void *); 129 int spec_close(void *); 130 #define spec_access genfs_ebadf 131 #define spec_getattr genfs_ebadf 132 #define spec_setattr genfs_ebadf 133 int spec_read(void *); 134 int spec_write(void *); 135 #define spec_lease_check genfs_nullop 136 #define spec_fcntl genfs_fcntl 137 int spec_ioctl(void *); 138 int spec_poll(void *); 139 int spec_kqfilter(void *); 140 #define spec_revoke genfs_revoke 141 int spec_mmap(void *); 142 int spec_fsync(void *); 143 #define spec_seek genfs_nullop /* XXX should query device */ 144 #define spec_remove genfs_badop 145 #define spec_link genfs_badop 146 #define spec_rename genfs_badop 147 #define spec_mkdir genfs_badop 148 #define spec_rmdir genfs_badop 149 #define spec_symlink genfs_badop 150 #define spec_readdir genfs_badop 151 #define spec_readlink genfs_badop 152 #define spec_abortop genfs_badop 153 #define spec_reclaim genfs_nullop 154 int spec_inactive(void *); 155 #define spec_lock genfs_nolock 156 #define spec_unlock genfs_nounlock 157 int spec_bmap(void *); 158 int spec_strategy(void *); 159 int spec_print(void *); 160 #define spec_islocked genfs_noislocked 161 int spec_pathconf(void *); 162 int spec_advlock(void *); 163 #define spec_bwrite vn_bwrite 164 #define spec_getpages genfs_getpages 165 #define spec_putpages genfs_putpages 166 167 #endif /* _MISCFS_SPECFS_SPECDEV_H_ */ 168
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