| 1 | /* |
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| 2 | * Copyright (c) 1989, 1991, 1993 |
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| 3 | * The Regents of the University of California. All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * 1. Redistributions of source code must retain the above copyright |
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| 9 | * notice, this list of conditions and the following disclaimer. |
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer in the |
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| 12 | * documentation and/or other materials provided with the distribution. |
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| 13 | * 4. Neither the name of the University nor the names of its contributors |
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| 14 | * may be used to endorse or promote products derived from this software |
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| 15 | * without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 27 | * SUCH DAMAGE. |
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| 28 | * |
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| 29 | * @(#)mount.h 8.21 (Berkeley) 5/20/95 |
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| 30 | * $FreeBSD: src/sys/sys/mount.h,v 1.195 2005/03/24 07:29:23 jeff Exp $ |
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| 31 | */ |
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| 32 | |
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| 33 | /* |
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| 34 | * $Id$ |
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| 35 | */ |
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| 36 | |
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| 37 | #ifndef _SYS_MOUNT_H_ |
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| 38 | #define _SYS_MOUNT_H_ |
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| 39 | |
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| 40 | #ifndef _KERNEL |
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| 41 | #include <sys/ucred.h> |
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| 42 | #endif |
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| 43 | #include <sys/queue.h> |
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| 44 | |
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| 45 | typedef struct fsid { int32_t val[2]; } fsid_t; /* filesystem id type */ |
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| 46 | |
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| 47 | /* |
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| 48 | * File identifier. |
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| 49 | * These are unique per filesystem on a single machine. |
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| 50 | */ |
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| 51 | #define MAXFIDSZ 16 |
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| 52 | |
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| 53 | struct fid { |
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| 54 | u_short fid_len; /* length of data in bytes */ |
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| 55 | u_short fid_reserved; /* force longword alignment */ |
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| 56 | char fid_data[MAXFIDSZ]; /* data (variable length) */ |
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| 57 | }; |
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| 58 | |
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| 59 | /* |
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| 60 | * filesystem statistics |
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| 61 | */ |
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| 62 | |
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| 63 | #define MNAMELEN 90 /* length of buffer for returned name */ |
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| 64 | |
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| 65 | struct statfs { |
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| 66 | long f_spare2; /* placeholder */ |
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| 67 | long f_bsize; /* fundamental filesystem block size */ |
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| 68 | long f_iosize; /* optimal transfer block size */ |
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| 69 | long f_blocks; /* total data blocks in filesystem */ |
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| 70 | long f_bfree; /* free blocks in fs */ |
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| 71 | long f_bavail; /* free blocks avail to non-superuser */ |
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| 72 | long f_files; /* total file nodes in filesystem */ |
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| 73 | long f_ffree; /* free file nodes in fs */ |
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| 74 | fsid_t f_fsid; /* filesystem id */ |
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| 75 | uid_t f_owner; /* user that mounted the filesystem */ |
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| 76 | int f_type; /* type of filesystem (see below) */ |
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| 77 | int f_flags; /* copy of mount flags */ |
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| 78 | long f_spare[6]; /* spare for later */ |
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| 79 | char f_mntonname[MNAMELEN]; /* directory on which mounted */ |
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| 80 | char f_mntfromname[MNAMELEN];/* mounted filesystem */ |
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| 81 | }; |
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| 82 | |
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| 83 | /* |
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| 84 | * Structure per mounted filesystem. Each mounted filesystem has an |
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| 85 | * array of operations and an instance record. The filesystems are |
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| 86 | * put on a doubly linked list. |
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| 87 | * |
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| 88 | */ |
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| 89 | LIST_HEAD(vnodelst, vnode); |
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| 90 | |
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| 91 | struct mount { |
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| 92 | CIRCLEQ_ENTRY(mount) mnt_list; /* mount list */ |
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| 93 | struct vfsops *mnt_op; /* operations on fs */ |
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| 94 | struct vfsconf *mnt_vfc; /* configuration info */ |
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| 95 | struct vnode *mnt_vnodecovered; /* vnode we mounted on */ |
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| 96 | struct vnodelst mnt_vnodelist; /* list of vnodes this mount */ |
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| 97 | int mnt_flag; /* flags */ |
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| 98 | int mnt_maxsymlinklen; /* max size of short symlink */ |
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| 99 | struct statfs mnt_stat; /* cache of filesystem stats */ |
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| 100 | void * mnt_data; /* private data */ |
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| 101 | time_t mnt_time; /* last time written*/ |
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| 102 | }; |
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| 103 | |
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| 104 | /* |
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| 105 | * Mount flags. |
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| 106 | * |
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| 107 | * Unmount uses MNT_FORCE flag. |
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| 108 | */ |
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| 109 | #define MNT_RDONLY 0x00000001 /* read only filesystem */ |
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| 110 | #define MNT_SYNCHRONOUS 0x00000002 /* filesystem written synchronously */ |
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| 111 | #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ |
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| 112 | #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ |
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| 113 | #define MNT_NODEV 0x00000010 /* don't interpret special files */ |
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| 114 | #define MNT_UNION 0x00000020 /* union with underlying filesystem */ |
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| 115 | #define MNT_ASYNC 0x00000040 /* filesystem written asynchronously */ |
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| 116 | #define MNT_NOATIME 0x10000000 /* Disable update of file access times */ |
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| 117 | |
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| 118 | /* |
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| 119 | * exported mount flags. |
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| 120 | */ |
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| 121 | #define MNT_EXRDONLY 0x00000080 /* exported read only */ |
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| 122 | #define MNT_EXPORTED 0x00000100 /* filesystem is exported */ |
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| 123 | #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ |
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| 124 | #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ |
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| 125 | #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ |
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| 126 | #define MNT_EXPUBLIC 0x20000000 /* public export (WebNFS) */ |
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| 127 | |
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| 128 | /* |
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| 129 | * Flags set by internal operations. |
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| 130 | */ |
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| 131 | #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ |
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| 132 | #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ |
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| 133 | #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ |
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| 134 | #define MNT_USER 0x00008000 /* mounted by a user */ |
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| 135 | #define MNT_IGNORE 0x00800000 /* do not show entry in df */ |
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| 136 | |
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| 137 | /* |
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| 138 | * Mask of flags that are visible to statfs() |
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| 139 | */ |
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| 140 | #define MNT_VISFLAGMASK (MNT_RDONLY|MNT_SYNCHRONOUS|MNT_NOEXEC|MNT_NOSUID| \ |
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| 141 | MNT_NODEV|MNT_UNION|MNT_ASYNC|MNT_EXRDONLY|MNT_EXPORTED| \ |
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| 142 | MNT_DEFEXPORTED|MNT_EXPORTANON|MNT_EXKERB|MNT_LOCAL| \ |
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| 143 | MNT_QUOTA|MNT_ROOTFS|MNT_USER|MNT_NOATIME) |
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| 144 | |
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| 145 | /* |
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| 146 | * filesystem control flags. |
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| 147 | * |
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| 148 | * MNT_MLOCK lock the mount entry so that name lookup cannot proceed |
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| 149 | * past the mount point. This keeps the subtree stable during mounts |
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| 150 | * and unmounts. |
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| 151 | */ |
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| 152 | #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ |
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| 153 | #define MNT_DELEXPORT 0x00020000 /* delete export host lists */ |
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| 154 | #define MNT_RELOAD 0x00040000 /* reload filesystem data */ |
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| 155 | #define MNT_FORCE 0x00080000 /* force unmount or readonly change */ |
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| 156 | #define MNT_MLOCK 0x00100000 /* lock so that subtree is stable */ |
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| 157 | #define MNT_MWAIT 0x00200000 /* someone is waiting for lock */ |
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| 158 | #define MNT_MPBUSY 0x00400000 /* scan of mount point in progress */ |
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| 159 | #define MNT_MPWANT 0x00800000 /* waiting for mount point */ |
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| 160 | #define MNT_UNMOUNT 0x01000000 /* unmount in progress */ |
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| 161 | #define MNT_WANTRDWR 0x02000000 /* want upgrade to read/write */ |
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| 162 | |
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| 163 | /* |
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| 164 | * used to get configured filesystems information |
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| 165 | */ |
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| 166 | #define VFS_MAXNAMELEN 32 |
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| 167 | struct vfsconf { |
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| 168 | void *vfc_vfsops; |
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| 169 | char vfc_name[VFS_MAXNAMELEN]; |
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| 170 | int vfc_index; |
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| 171 | int vfc_refcount; |
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| 172 | int vfc_flags; |
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| 173 | }; |
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| 174 | |
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| 175 | /* |
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| 176 | * Operations supported on mounted filesystem. |
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| 177 | */ |
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| 178 | #ifdef _KERNEL |
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| 179 | |
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| 180 | extern int doforce; /* Flag to permit forcible unmounting. */ |
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| 181 | extern struct vfsconf void_vfsconf; |
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| 182 | extern struct vfsconf *vfsconf[]; |
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| 183 | |
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| 184 | #ifdef __STDC__ |
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| 185 | struct nameidata; |
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| 186 | struct mbuf; |
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| 187 | #endif |
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| 188 | |
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| 189 | struct vfsops { |
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| 190 | int (*vfs_mount) __P((struct mount *mp, char *path, caddr_t data, |
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| 191 | struct nameidata *ndp, struct proc *p)); |
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| 192 | int (*vfs_start) __P((struct mount *mp, int flags, |
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| 193 | struct proc *p)); |
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| 194 | int (*vfs_unmount) __P((struct mount *mp, int mntflags, |
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| 195 | struct proc *p)); |
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| 196 | int (*vfs_root) __P((struct mount *mp, struct vnode **vpp)); |
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| 197 | int (*vfs_quotactl) __P((struct mount *mp, int cmds, uid_t uid, |
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| 198 | caddr_t arg, struct proc *p)); |
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| 199 | int (*vfs_statfs) __P((struct mount *mp, struct statfs *sbp, |
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| 200 | struct proc *p)); |
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| 201 | int (*vfs_sync) __P((struct mount *mp, int waitfor, |
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| 202 | struct ucred *cred, struct proc *p)); |
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| 203 | int (*vfs_vget) __P((struct mount *mp, ino_t ino, |
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| 204 | struct vnode **vpp)); |
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| 205 | int (*vfs_fhtovp) __P((struct mount *mp, struct fid *fhp, |
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| 206 | struct mbuf *nam, struct vnode **vpp, |
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| 207 | int *exflagsp, struct ucred **credanonp)); |
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| 208 | int (*vfs_vptofh) __P((struct vnode *vp, struct fid *fhp)); |
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| 209 | int (*vfs_init) __P((void)); |
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| 210 | }; |
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| 211 | |
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| 212 | #define VFS_MOUNT(MP, PATH, DATA, NDP, P) \ |
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| 213 | (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P) |
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| 214 | #define VFS_START(MP, FLAGS, P) (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P) |
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| 215 | #define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P) |
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| 216 | #define VFS_ROOT(MP, VPP) (*(MP)->mnt_op->vfs_root)(MP, VPP) |
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| 217 | #define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P) |
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| 218 | #define VFS_STATFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P) |
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| 219 | #define VFS_SYNC(MP, WAIT, C, P) (*(MP)->mnt_op->vfs_sync)(MP, WAIT, C, P) |
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| 220 | #define VFS_VGET(MP, INO, VPP) (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP) |
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| 221 | #define VFS_FHTOVP(MP, FIDP, NAM, VPP, EXFLG, CRED) \ |
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| 222 | (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, NAM, VPP, EXFLG, CRED) |
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| 223 | #define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP) |
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| 224 | |
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| 225 | #endif /* _KERNEL */ |
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| 226 | |
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| 227 | /* |
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| 228 | * Flags for various system call interfaces. |
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| 229 | * |
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| 230 | * waitfor flags to vfs_sync() and getfsstat() |
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| 231 | */ |
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| 232 | #define MNT_WAIT 1 |
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| 233 | #define MNT_NOWAIT 2 |
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| 234 | |
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| 235 | /* |
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| 236 | * Generic file handle |
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| 237 | */ |
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| 238 | struct fhandle { |
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| 239 | fsid_t fh_fsid; /* Filesystem id of mount point */ |
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| 240 | struct fid fh_fid; /* Filesys specific id */ |
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| 241 | }; |
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| 242 | typedef struct fhandle fhandle_t; |
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| 243 | |
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| 244 | #ifdef _KERNEL |
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| 245 | #include <net/radix.h> |
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| 246 | #include <sys/socket.h> /* XXX for AF_MAX */ |
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| 247 | |
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| 248 | /* |
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| 249 | * Network address lookup element |
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| 250 | */ |
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| 251 | struct netcred { |
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| 252 | struct radix_node netc_rnodes[2]; |
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| 253 | int netc_exflags; |
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| 254 | struct ucred netc_anon; |
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| 255 | }; |
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| 256 | |
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| 257 | /* |
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| 258 | * Network export information |
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| 259 | */ |
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| 260 | struct netexport { |
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| 261 | struct netcred ne_defexported; /* Default export */ |
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| 262 | struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */ |
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| 263 | }; |
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| 264 | #endif /* _KERNEL */ |
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| 265 | |
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| 266 | /* |
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| 267 | * Export arguments for local filesystem mount calls. |
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| 268 | */ |
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| 269 | struct export_args { |
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| 270 | int ex_flags; /* export related flags */ |
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| 271 | uid_t ex_root; /* mapping for root uid */ |
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| 272 | struct ucred ex_anon; /* mapping for anonymous user */ |
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| 273 | struct sockaddr *ex_addr; /* net address to which exported */ |
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| 274 | int ex_addrlen; /* and the net address length */ |
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| 275 | struct sockaddr *ex_mask; /* mask of valid bits in saddr */ |
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| 276 | int ex_masklen; /* and the smask length */ |
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| 277 | }; |
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| 278 | |
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| 279 | #ifdef _KERNEL |
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| 280 | extern int (*mountroot) __P((void *)); |
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| 281 | extern struct vfsops *mountrootvfsops; |
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| 282 | |
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| 283 | /* |
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| 284 | * exported vnode operations |
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| 285 | */ |
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| 286 | int dounmount __P((struct mount *, int, struct proc *)); |
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| 287 | struct mount *getvfs __P((fsid_t *)); /* return vfs given fsid */ |
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| 288 | void getnewfsid __P((struct mount *, int)); |
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| 289 | int vflush __P((struct mount *, struct vnode *, int)); |
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| 290 | int vfs_export /* process mount export info */ |
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| 291 | __P((struct mount *, struct netexport *, struct export_args *)); |
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| 292 | struct netcred *vfs_export_lookup /* lookup host in fs export list */ |
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| 293 | __P((struct mount *, struct netexport *, struct mbuf *)); |
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| 294 | int vfs_lock __P((struct mount *)); /* lock a vfs */ |
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| 295 | int vfs_mountedon __P((struct vnode *)); /* is a vfs mounted on vp */ |
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| 296 | int vfs_mountroot __P((void *)); /* XXX goes away? */ |
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| 297 | void vfs_msync __P((struct mount *, int)); |
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| 298 | void vfs_unlock __P((struct mount *)); /* unlock a vfs */ |
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| 299 | void vfs_unmountall __P((void)); |
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| 300 | int vfs_busy __P((struct mount *)); /* mark a vfs busy */ |
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| 301 | void vfs_unbusy __P((struct mount *)); /* mark a vfs not busy */ |
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| 302 | extern CIRCLEQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */ |
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| 303 | extern struct vfsops *vfssw[]; /* filesystem type table */ |
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| 304 | |
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| 305 | #else /* _KERNEL */ |
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| 306 | |
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| 307 | #include <sys/cdefs.h> |
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| 308 | |
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| 309 | __BEGIN_DECLS |
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| 310 | int fstatfs __P((int, struct statfs *)); |
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| 311 | int getfh __P((const char *, fhandle_t *)); |
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| 312 | int getfsstat __P((struct statfs *, long, int)); |
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| 313 | int getmntinfo __P((struct statfs **, int)); |
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| 314 | int mount __P((int, const char *, int, void *)); |
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| 315 | int statfs __P((const char *, struct statfs *)); |
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| 316 | int unmount __P((const char *, int)); |
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| 317 | |
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| 318 | /* C library stuff */ |
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| 319 | struct vfsconf *getvfsbyname __P((const char *)); |
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| 320 | struct vfsconf *getvfsbytype __P((int)); |
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| 321 | struct vfsconf *getvfsent __P((void)); |
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| 322 | void setvfsent __P((int)); |
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| 323 | void endvfsent __P((void)); |
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| 324 | int vfsisloadable __P((const char *)); |
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| 325 | int vfsload __P((const char *)); |
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| 326 | __END_DECLS |
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| 327 | |
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| 328 | #endif /* _KERNEL */ |
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| 329 | |
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| 330 | #endif /* !_SYS_MOUNT_H_ */ |
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