| 1 | /* $NetBSD: specdev.h,v 1.44 2015/06/23 10:42:35 hannken 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 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 17 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 18 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 19 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 20 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 21 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 22 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 23 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 24 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 25 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 26 | * POSSIBILITY OF SUCH DAMAGE. |
| 27 | */ |
| 28 | |
| 29 | /* |
| 30 | * Copyright (c) 1990, 1993 |
| 31 | * The Regents of the University of California. All rights reserved. |
| 32 | * |
| 33 | * Redistribution and use in source and binary forms, with or without |
| 34 | * modification, are permitted provided that the following conditions |
| 35 | * are met: |
| 36 | * 1. Redistributions of source code must retain the above copyright |
| 37 | * notice, this list of conditions and the following disclaimer. |
| 38 | * 2. Redistributions in binary form must reproduce the above copyright |
| 39 | * notice, this list of conditions and the following disclaimer in the |
| 40 | * documentation and/or other materials provided with the distribution. |
| 41 | * 3. Neither the name of the University nor the names of its contributors |
| 42 | * may be used to endorse or promote products derived from this software |
| 43 | * without specific prior written permission. |
| 44 | * |
| 45 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 46 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 47 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 48 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 49 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 50 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 51 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 52 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 53 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 54 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 55 | * SUCH DAMAGE. |
| 56 | * |
| 57 | * @(#)specdev.h 8.6 (Berkeley) 5/21/95 |
| 58 | */ |
| 59 | |
| 60 | #ifndef _MISCFS_SPECFS_SPECDEV_H_ |
| 61 | #define _MISCFS_SPECFS_SPECDEV_H_ |
| 62 | |
| 63 | #include <sys/mutex.h> |
| 64 | #include <sys/vnode.h> |
| 65 | |
| 66 | typedef struct specnode { |
| 67 | vnode_t *sn_next; |
| 68 | struct specdev *sn_dev; |
| 69 | u_int sn_opencnt; |
| 70 | dev_t sn_rdev; |
| 71 | bool sn_gone; |
| 72 | } specnode_t; |
| 73 | |
| 74 | typedef struct specdev { |
| 75 | struct mount *sd_mountpoint; |
| 76 | struct lockf *sd_lockf; |
| 77 | vnode_t *sd_bdevvp; |
| 78 | u_int sd_opencnt; |
| 79 | u_int sd_refcnt; |
| 80 | dev_t sd_rdev; |
| 81 | } specdev_t; |
| 82 | |
| 83 | /* |
| 84 | * Exported shorthand |
| 85 | */ |
| 86 | #define v_specnext v_specnode->sn_next |
| 87 | #define v_rdev v_specnode->sn_rdev |
| 88 | #define v_speclockf v_specnode->sn_dev->sd_lockf |
| 89 | |
| 90 | /* |
| 91 | * Special device management |
| 92 | */ |
| 93 | void spec_node_init(vnode_t *, dev_t); |
| 94 | void spec_node_destroy(vnode_t *); |
| 95 | int spec_node_lookup_by_dev(enum vtype, dev_t, vnode_t **); |
| 96 | int spec_node_lookup_by_mount(struct mount *, vnode_t **); |
| 97 | struct mount *spec_node_getmountedfs(vnode_t *); |
| 98 | void spec_node_setmountedfs(vnode_t *, struct mount *); |
| 99 | void spec_node_revoke(vnode_t *); |
| 100 | |
| 101 | /* |
| 102 | * Prototypes for special file operations on vnodes. |
| 103 | */ |
| 104 | extern int (**spec_vnodeop_p)(void *); |
| 105 | struct nameidata; |
| 106 | struct componentname; |
| 107 | struct flock; |
| 108 | struct buf; |
| 109 | struct uio; |
| 110 | |
| 111 | int spec_lookup(void *); |
| 112 | #define spec_create genfs_badop |
| 113 | #define spec_whiteout genfs_badop |
| 114 | #define spec_mknod genfs_badop |
| 115 | int spec_open(void *); |
| 116 | int spec_close(void *); |
| 117 | #define spec_access genfs_ebadf |
| 118 | #define spec_getattr genfs_ebadf |
| 119 | #define spec_setattr genfs_ebadf |
| 120 | int spec_read(void *); |
| 121 | int spec_write(void *); |
| 122 | #define spec_fallocate genfs_eopnotsupp |
| 123 | int spec_fdiscard(void *); |
| 124 | #define spec_fcntl genfs_fcntl |
| 125 | int spec_ioctl(void *); |
| 126 | int spec_poll(void *); |
| 127 | int spec_kqfilter(void *); |
| 128 | #define spec_revoke genfs_revoke |
| 129 | int spec_mmap(void *); |
| 130 | int spec_fsync(void *); |
| 131 | #define spec_seek genfs_nullop /* XXX should query device */ |
| 132 | #define spec_remove genfs_badop |
| 133 | #define spec_link genfs_badop |
| 134 | #define spec_rename genfs_badop |
| 135 | #define spec_mkdir genfs_badop |
| 136 | #define spec_rmdir genfs_badop |
| 137 | #define spec_symlink genfs_badop |
| 138 | #define spec_readdir genfs_badop |
| 139 | #define spec_readlink genfs_badop |
| 140 | #define spec_abortop genfs_badop |
| 141 | int spec_inactive(void *); |
| 142 | int spec_reclaim(void *); |
| 143 | #define spec_lock genfs_nolock |
| 144 | #define spec_unlock genfs_nounlock |
| 145 | int spec_bmap(void *); |
| 146 | int spec_strategy(void *); |
| 147 | int spec_print(void *); |
| 148 | #define spec_islocked genfs_noislocked |
| 149 | int spec_pathconf(void *); |
| 150 | int spec_advlock(void *); |
| 151 | #define spec_bwrite vn_bwrite |
| 152 | #define spec_getpages genfs_getpages |
| 153 | #define spec_putpages genfs_putpages |
| 154 | |
| 155 | bool iskmemvp(struct vnode *); |
| 156 | void spec_init(void); |
| 157 | |
| 158 | #endif /* _MISCFS_SPECFS_SPECDEV_H_ */ |
| 159 | |