1 /* $NetBSD: fstypes.h,v 1.33 2015/05/06 15:57:08 hannken Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1991, 1993 5 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)mount.h 8.21 (Berkeley) 5/20/95 32 */ 33 34 #ifndef _SYS_FSTYPES_H_ 35 #define _SYS_FSTYPES_H_ 36 37 typedef struct { int32_t __fsid_val[2]; } fsid_t; /* file system id type */ 38 39 #if defined(_KERNEL) 40 /* 41 * File identifier. 42 * These are unique per filesystem on a single machine. 43 */ 44 struct fid { 45 unsigned short fid_len; /* length of data in bytes */ 46 unsigned short fid_reserved; /* compat: historic align */ 47 char fid_data[0]; /* data (variable length) */ 48 }; 49 50 /* 51 * Generic file handle 52 */ 53 struct fhandle { 54 fsid_t fh_fsid; /* File system id of mount point */ 55 struct fid fh_fid; /* File sys specific id */ 56 }; 57 typedef struct fhandle fhandle_t; 58 59 /* 60 * FHANDLE_SIZE_MAX: arbitrary value to prevent unreasonable allocation. 61 * 62 * FHANDLE_SIZE_MIN: chosen for compatibility. smaller handles are zero-padded. 63 */ 64 65 #define FHANDLE_SIZE_COMPAT 28 66 #define FHANDLE_SIZE_MAX 1024 67 #define FHANDLE_SIZE_MIN FHANDLE_SIZE_COMPAT 68 69 #define FHANDLE_FSID(fh) (&(fh)->fh_fsid) 70 #define FHANDLE_FILEID(fh) (&(fh)->fh_fid) 71 #define FHANDLE_SIZE_FROM_FILEID_SIZE(fidsize) \ 72 MAX(FHANDLE_SIZE_MIN, (offsetof(fhandle_t, fh_fid) + (fidsize))) 73 #define FHANDLE_SIZE(fh) \ 74 FHANDLE_SIZE_FROM_FILEID_SIZE(FHANDLE_FILEID(fh)->fid_len) 75 #endif /* defined(_KERNEL) */ 76 77 /* 78 * Mount flags. XXX BEWARE: these are not in numerical order! 79 * 80 * Unmount uses MNT_FORCE flag. 81 * 82 * Note that all mount flags are listed here. if you need to add one, take 83 * one of the __MNT_UNUSED flags. 84 */ 85 86 #define __MNT_UNUSED1 0x00200000 87 88 #define MNT_RDONLY 0x00000001 /* read only filesystem */ 89 #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */ 90 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ 91 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ 92 #define MNT_NODEV 0x00000010 /* don't interpret special files */ 93 #define MNT_UNION 0x00000020 /* union with underlying filesystem */ 94 #define MNT_ASYNC 0x00000040 /* file system written asynchronously */ 95 #define MNT_NOCOREDUMP 0x00008000 /* don't write core dumps to this FS */ 96 #define MNT_RELATIME 0x00020000 /* only update access time if mod/ch */ 97 #define MNT_IGNORE 0x00100000 /* don't show entry in df */ 98 #define MNT_DISCARD 0x00800000 /* use DISCARD/TRIM if supported */ 99 #define MNT_EXTATTR 0x01000000 /* enable extended attributes */ 100 #define MNT_LOG 0x02000000 /* Use logging */ 101 #define MNT_NOATIME 0x04000000 /* Never update access times in fs */ 102 #define MNT_SYMPERM 0x20000000 /* recognize symlink permission */ 103 #define MNT_NODEVMTIME 0x40000000 /* Never update mod times for devs */ 104 #define MNT_SOFTDEP 0x80000000 /* Use soft dependencies */ 105 106 #define __MNT_BASIC_FLAGS \ 107 { MNT_ASYNC, 0, "asynchronous" }, \ 108 { MNT_DISCARD, 0, "discard" }, \ 109 { MNT_EXTATTR, 0, "extattr" }, \ 110 { MNT_IGNORE, 0, "hidden" }, \ 111 { MNT_LOG, 0, "log" }, \ 112 { MNT_NOATIME, 0, "noatime" }, \ 113 { MNT_NOCOREDUMP, 0, "nocoredump" }, \ 114 { MNT_NODEV, 0, "nodev" }, \ 115 { MNT_NODEVMTIME, 0, "nodevmtime" }, \ 116 { MNT_NOEXEC, 0, "noexec" }, \ 117 { MNT_NOSUID, 0, "nosuid" }, \ 118 { MNT_RDONLY, 0, "read-only" }, \ 119 { MNT_RELATIME, 0, "relatime" }, \ 120 { MNT_SOFTDEP, 0, "soft dependencies" }, \ 121 { MNT_SYMPERM, 0, "symperm" }, \ 122 { MNT_SYNCHRONOUS, 0, "synchronous" }, \ 123 { MNT_UNION, 0, "union" }, \ 124 125 #define MNT_BASIC_FLAGS (MNT_ASYNC | MNT_DISCARD | MNT_EXTATTR | MNT_LOG | \ 126 MNT_NOATIME | MNT_NOCOREDUMP | MNT_NODEV | MNT_NODEVMTIME | MNT_NOEXEC | \ 127 MNT_NOSUID | MNT_RDONLY | MNT_RELATIME | MNT_SOFTDEP | MNT_SYMPERM | \ 128 MNT_SYNCHRONOUS | MNT_UNION) 129 /* 130 * exported mount flags. 131 */ 132 #define MNT_EXRDONLY 0x00000080 /* exported read only */ 133 #define MNT_EXPORTED 0x00000100 /* file system is exported */ 134 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ 135 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ 136 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ 137 #define MNT_EXNORESPORT 0x08000000 /* don't enforce reserved ports (NFS) */ 138 #define MNT_EXPUBLIC 0x10000000 /* public export (WebNFS) */ 139 140 #define __MNT_EXPORTED_FLAGS \ 141 { MNT_EXRDONLY, 1, "exported read-only" }, \ 142 { MNT_EXPORTED, 0, "NFS exported" }, \ 143 { MNT_DEFEXPORTED, 1, "exported to the world" }, \ 144 { MNT_EXPORTANON, 1, "anon uid mapping" }, \ 145 { MNT_EXKERB, 1, "kerberos uid mapping" }, \ 146 { MNT_EXNORESPORT, 0, "non-reserved ports" }, \ 147 { MNT_EXPUBLIC, 0, "WebNFS exports" }, 148 149 /* 150 * Flags set by internal operations. 151 */ 152 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ 153 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ 154 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ 155 156 #define __MNT_INTERNAL_FLAGS \ 157 { MNT_LOCAL, 0, "local" }, \ 158 { MNT_QUOTA, 0, "with quotas" }, \ 159 { MNT_ROOTFS, 1, "root file system" }, 160 161 /* 162 * Mask of flags that are visible to statvfs() 163 */ 164 #define MNT_VISFLAGMASK ( \ 165 MNT_RDONLY | \ 166 MNT_SYNCHRONOUS | \ 167 MNT_NOEXEC | \ 168 MNT_NOSUID | \ 169 MNT_NODEV | \ 170 MNT_UNION | \ 171 MNT_ASYNC | \ 172 MNT_NOCOREDUMP | \ 173 MNT_IGNORE | \ 174 MNT_DISCARD | \ 175 MNT_NOATIME | \ 176 MNT_SYMPERM | \ 177 MNT_NODEVMTIME | \ 178 MNT_SOFTDEP | \ 179 MNT_EXRDONLY | \ 180 MNT_EXPORTED | \ 181 MNT_DEFEXPORTED | \ 182 MNT_EXPORTANON | \ 183 MNT_EXKERB | \ 184 MNT_EXNORESPORT | \ 185 MNT_EXPUBLIC | \ 186 MNT_LOCAL | \ 187 MNT_QUOTA | \ 188 MNT_ROOTFS | \ 189 MNT_LOG | \ 190 MNT_EXTATTR) 191 192 /* 193 * External filesystem control flags. 194 */ 195 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ 196 #define MNT_RELOAD 0x00040000 /* reload filesystem data */ 197 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */ 198 #define MNT_GETARGS 0x00400000 /* retrieve file system specific args */ 199 200 #define MNT_OP_FLAGS (MNT_UPDATE|MNT_RELOAD|MNT_FORCE|MNT_GETARGS) 201 202 #define __MNT_EXTERNAL_FLAGS \ 203 { MNT_UPDATE, 1, "being updated" }, \ 204 { MNT_RELOAD, 1, "reload filesystem data" }, \ 205 { MNT_FORCE, 1, "force unmount or readonly change" }, \ 206 { MNT_GETARGS, 1, "retrieve mount arguments" }, 207 208 /* 209 * Internal filesystem control flags. 210 * These are set in struct mount mnt_iflag. 211 * 212 * IMNT_UNMOUNT locks the mount entry so that name lookup cannot proceed 213 * past the mount point. This keeps the subtree stable during mounts 214 * and unmounts. 215 */ 216 #define IMNT_GONE 0x00000001 /* filesystem is gone.. */ 217 #define IMNT_UNMOUNT 0x00000002 /* unmount in progress */ 218 #define IMNT_WANTRDWR 0x00000004 /* upgrade to read/write requested */ 219 #define IMNT_DTYPE 0x00000040 /* returns d_type fields */ 220 #define IMNT_HAS_TRANS 0x00000080 /* supports transactions */ 221 #define IMNT_MPSAFE 0x00000100 /* file system code MP safe */ 222 #define IMNT_CAN_RWTORO 0x00000200 /* can downgrade fs to from rw to r/o */ 223 #define IMNT_ONWORKLIST 0x00000400 /* on syncer worklist */ 224 225 #define __MNT_FLAGS \ 226 __MNT_BASIC_FLAGS \ 227 __MNT_EXPORTED_FLAGS \ 228 __MNT_INTERNAL_FLAGS \ 229 __MNT_EXTERNAL_FLAGS 230 231 #define __MNT_FLAG_BITS \ 232 "\20" \ 233 "\40MNT_SOFTDEP" \ 234 "\37MNT_NODEVMTIME" \ 235 "\36MNT_SYMPERM" \ 236 "\35MNT_EXPUBLIC" \ 237 "\34MNT_EXNORESPORT" \ 238 "\33MNT_NOATIME" \ 239 "\32MNT_LOG" \ 240 "\31MNT_EXTATTR" \ 241 "\30MNT_DISCARD" \ 242 "\27MNT_GETARGS" \ 243 "\26MNT_UNUSED" \ 244 "\25MNT_IGNORE" \ 245 "\24MNT_FORCE" \ 246 "\23MNT_RELOAD" \ 247 "\22MNT_RELATIME" \ 248 "\21MNT_UPDATE" \ 249 "\20MNT_NOCOREDUMP" \ 250 "\17MNT_ROOTFS" \ 251 "\16MNT_QUOTA" \ 252 "\15MNT_LOCAL" \ 253 "\14MNT_EXKERB" \ 254 "\13MNT_EXPORTANON" \ 255 "\12MNT_DEFEXPORTED" \ 256 "\11MNT_EXPORTED" \ 257 "\10MNT_EXRDONLY" \ 258 "\07MNT_ASYNC" \ 259 "\06MNT_UNION" \ 260 "\05MNT_NODEV" \ 261 "\04MNT_NOSUID" \ 262 "\03MNT_NOEXEC" \ 263 "\02MNT_SYNCHRONOUS" \ 264 "\01MNT_RDONLY" 265 266 #define __IMNT_FLAG_BITS \ 267 "\20" \ 268 "\13IMNT_ONWORKLIST" \ 269 "\12IMNT_CAN_RWTORO" \ 270 "\11IMNT_MPSAFE" \ 271 "\10IMNT_HAS_TRANS" \ 272 "\07IMNT_DTYPE" \ 273 "\03IMNT_WANTRDWR" \ 274 "\02IMNT_UNMOUNT" \ 275 "\01IMNT_GONE" 276 277 /* 278 * Flags for various system call interfaces. 279 * 280 * waitfor flags to vfs_sync() and getvfsstat() 281 */ 282 #define MNT_WAIT 1 /* synchronously wait for I/O to complete */ 283 #define MNT_NOWAIT 2 /* start all I/O, but do not wait for it */ 284 #define MNT_LAZY 3 /* push data not written by filesystem syncer */ 285 #endif /* _SYS_FSTYPES_H_ */ 286