1 /* 2 * Copyright (c) 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 * 7 * @(#)mount.h 8.7 (Berkeley) 01/13/94 8 */ 9 10 #ifndef KERNEL 11 #include <sys/ucred.h> 12 #endif 13 #include <sys/queue.h> 14 15 typedef struct { long val[2]; } fsid_t; /* file system id type */ 16 17 /* 18 * File identifier. 19 * These are unique per filesystem on a single machine. 20 */ 21 #define MAXFIDSZ 16 22 23 struct fid { 24 u_short fid_len; /* length of data in bytes */ 25 u_short fid_reserved; /* force longword alignment */ 26 char fid_data[MAXFIDSZ]; /* data (variable length) */ 27 }; 28 29 /* 30 * file system statistics 31 */ 32 33 #define MNAMELEN 90 /* length of buffer for returned name */ 34 35 struct statfs { 36 short f_type; /* type of filesystem (see below) */ 37 short f_flags; /* copy of mount flags */ 38 long f_bsize; /* fundamental file system block size */ 39 long f_iosize; /* optimal transfer block size */ 40 long f_blocks; /* total data blocks in file system */ 41 long f_bfree; /* free blocks in fs */ 42 long f_bavail; /* free blocks avail to non-superuser */ 43 long f_files; /* total file nodes in file system */ 44 long f_ffree; /* free file nodes in fs */ 45 fsid_t f_fsid; /* file system id */ 46 long f_spare[9]; /* spare for later */ 47 char f_mntonname[MNAMELEN]; /* directory on which mounted */ 48 char f_mntfromname[MNAMELEN];/* mounted filesystem */ 49 }; 50 51 /* 52 * File system types. 53 */ 54 #define MOUNT_NONE 0 55 #define MOUNT_UFS 1 /* Fast Filesystem */ 56 #define MOUNT_NFS 2 /* Sun-compatible Network Filesystem */ 57 #define MOUNT_MFS 3 /* Memory-based Filesystem */ 58 #define MOUNT_MSDOS 4 /* MS/DOS Filesystem */ 59 #define MOUNT_LFS 5 /* Log-based Filesystem */ 60 #define MOUNT_LOFS 6 /* Loopback Filesystem */ 61 #define MOUNT_FDESC 7 /* File Descriptor Filesystem */ 62 #define MOUNT_PORTAL 8 /* Portal Filesystem */ 63 #define MOUNT_NULL 9 /* Minimal Filesystem Layer */ 64 #define MOUNT_UMAP 10 /* User/Group Identifer Remapping Filesystem */ 65 #define MOUNT_KERNFS 11 /* Kernel Information Filesystem */ 66 #define MOUNT_PROCFS 12 /* /proc Filesystem */ 67 #define MOUNT_AFS 13 /* Andrew Filesystem */ 68 #define MOUNT_ISOFS 14 /* ISO9660 (aka CDROM) Filesystem */ 69 #define MOUNT_MAXTYPE 14 70 71 #define INITMOUNTNAMES { \ 72 "none", /* 0 MOUNT_NONE */ \ 73 "ufs", /* 1 MOUNT_UFS */ \ 74 "nfs", /* 2 MOUNT_NFS */ \ 75 "mfs", /* 3 MOUNT_MFS */ \ 76 "pc", /* 4 MOUNT_PC */ \ 77 "lfs", /* 5 MOUNT_LFS */ \ 78 "lofs", /* 6 MOUNT_LOFS */ \ 79 "fdesc", /* 7 MOUNT_FDESC */ \ 80 "portal", /* 8 MOUNT_PORTAL */ \ 81 "null", /* 9 MOUNT_NULL */ \ 82 "umap", /* 10 MOUNT_UMAP */ \ 83 "kernfs", /* 11 MOUNT_KERNFS */ \ 84 "procfs", /* 12 MOUNT_PROCFS */ \ 85 "afs", /* 13 MOUNT_AFS */ \ 86 "iso9660fs", /* 14 MOUNT_ISOFS */ \ 87 0, /* 15 MOUNT_SPARE */ \ 88 } 89 90 /* 91 * Structure per mounted file system. Each mounted file system has an 92 * array of operations and an instance record. The file systems are 93 * put on a doubly linked list. 94 */ 95 LIST_HEAD(vnodelst, vnode); 96 97 struct mount { 98 TAILQ_ENTRY(mount) mnt_list; /* mount list */ 99 struct vfsops *mnt_op; /* operations on fs */ 100 struct vnode *mnt_vnodecovered; /* vnode we mounted on */ 101 struct vnodelst mnt_vnodelist; /* list of vnodes this mount */ 102 int mnt_flag; /* flags */ 103 int mnt_maxsymlinklen; /* max size of short symlink */ 104 struct statfs mnt_stat; /* cache of filesystem stats */ 105 qaddr_t mnt_data; /* private data */ 106 }; 107 108 /* 109 * Mount flags. 110 * 111 * Unmount uses MNT_FORCE flag. 112 */ 113 #define MNT_RDONLY 0x00000001 /* read only filesystem */ 114 #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */ 115 #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ 116 #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ 117 #define MNT_NODEV 0x00000010 /* don't interpret special files */ 118 #define MNT_UNION 0x00000020 /* union with underlying filesystem */ 119 #define MNT_ASYNC 0x00000040 /* file system written asynchronously */ 120 121 /* 122 * exported mount flags. 123 */ 124 #define MNT_EXRDONLY 0x00000080 /* exported read only */ 125 #define MNT_EXPORTED 0x00000100 /* file system is exported */ 126 #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ 127 #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ 128 #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ 129 130 /* 131 * Flags set by internal operations. 132 */ 133 #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ 134 #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ 135 #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ 136 137 /* 138 * Mask of flags that are visible to statfs() 139 */ 140 #define MNT_VISFLAGMASK 0x0000ffff 141 142 /* 143 * filesystem control flags. 144 * 145 * MNT_MLOCK lock the mount entry so that name lookup cannot proceed 146 * past the mount point. This keeps the subtree stable during mounts 147 * and unmounts. 148 */ 149 #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ 150 #define MNT_DELEXPORT 0x00020000 /* delete export host lists */ 151 #define MNT_RELOAD 0x00040000 /* reload filesystem data */ 152 #define MNT_FORCE 0x00080000 /* force unmount or readonly change */ 153 #define MNT_MLOCK 0x00100000 /* lock so that subtree is stable */ 154 #define MNT_MWAIT 0x00200000 /* someone is waiting for lock */ 155 #define MNT_MPBUSY 0x00400000 /* scan of mount point in progress */ 156 #define MNT_MPWANT 0x00800000 /* waiting for mount point */ 157 #define MNT_UNMOUNT 0x01000000 /* unmount in progress */ 158 #define MNT_WANTRDWR 0x02000000 /* want upgrade to read/write */ 159 160 /* 161 * Operations supported on mounted file system. 162 */ 163 #ifdef KERNEL 164 #ifdef __STDC__ 165 struct nameidata; 166 struct mbuf; 167 #endif 168 169 struct vfsops { 170 int (*vfs_mount) __P((struct mount *mp, char *path, caddr_t data, 171 struct nameidata *ndp, struct proc *p)); 172 int (*vfs_start) __P((struct mount *mp, int flags, 173 struct proc *p)); 174 int (*vfs_unmount) __P((struct mount *mp, int mntflags, 175 struct proc *p)); 176 int (*vfs_root) __P((struct mount *mp, struct vnode **vpp)); 177 int (*vfs_quotactl) __P((struct mount *mp, int cmds, uid_t uid, 178 caddr_t arg, struct proc *p)); 179 int (*vfs_statfs) __P((struct mount *mp, struct statfs *sbp, 180 struct proc *p)); 181 int (*vfs_sync) __P((struct mount *mp, int waitfor, 182 struct ucred *cred, struct proc *p)); 183 int (*vfs_vget) __P((struct mount *mp, ino_t ino, 184 struct vnode **vpp)); 185 int (*vfs_fhtovp) __P((struct mount *mp, struct fid *fhp, 186 struct mbuf *nam, struct vnode **vpp, 187 int *exflagsp, struct ucred **credanonp)); 188 int (*vfs_vptofh) __P((struct vnode *vp, struct fid *fhp)); 189 int (*vfs_init) __P((void)); 190 }; 191 192 #define VFS_MOUNT(MP, PATH, DATA, NDP, P) \ 193 (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P) 194 #define VFS_START(MP, FLAGS, P) (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P) 195 #define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P) 196 #define VFS_ROOT(MP, VPP) (*(MP)->mnt_op->vfs_root)(MP, VPP) 197 #define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P) 198 #define VFS_STATFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P) 199 #define VFS_SYNC(MP, WAIT, C, P) (*(MP)->mnt_op->vfs_sync)(MP, WAIT, C, P) 200 #define VFS_VGET(MP, INO, VPP) (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP) 201 #define VFS_FHTOVP(MP, FIDP, NAM, VPP, EXFLG, CRED) \ 202 (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, NAM, VPP, EXFLG, CRED) 203 #define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP) 204 #endif /* KERNEL */ 205 206 /* 207 * Flags for various system call interfaces. 208 * 209 * waitfor flags to vfs_sync() and getfsstat() 210 */ 211 #define MNT_WAIT 1 212 #define MNT_NOWAIT 2 213 214 /* 215 * Generic file handle 216 */ 217 struct fhandle { 218 fsid_t fh_fsid; /* File system id of mount point */ 219 struct fid fh_fid; /* File sys specific id */ 220 }; 221 typedef struct fhandle fhandle_t; 222 223 #ifdef KERNEL 224 #include <net/radix.h> 225 #include <sys/socket.h> /* XXX for AF_MAX */ 226 227 /* 228 * Network address lookup element 229 */ 230 struct netcred { 231 struct radix_node netc_rnodes[2]; 232 int netc_exflags; 233 struct ucred netc_anon; 234 }; 235 236 /* 237 * Network export information 238 */ 239 struct netexport { 240 struct netcred ne_defexported; /* Default export */ 241 struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */ 242 }; 243 #endif /* KERNEL */ 244 245 /* 246 * Export arguments for local filesystem mount calls. 247 */ 248 struct export_args { 249 int ex_flags; /* export related flags */ 250 uid_t ex_root; /* mapping for root uid */ 251 struct ucred ex_anon; /* mapping for anonymous user */ 252 struct sockaddr *ex_addr; /* net address to which exported */ 253 int ex_addrlen; /* and the net address length */ 254 struct sockaddr *ex_mask; /* mask of valid bits in saddr */ 255 int ex_masklen; /* and the smask length */ 256 }; 257 258 /* 259 * Arguments to mount UFS-based filesystems 260 */ 261 struct ufs_args { 262 char *fspec; /* block special device to mount */ 263 struct export_args export; /* network export information */ 264 }; 265 266 #ifdef MFS 267 /* 268 * Arguments to mount MFS 269 */ 270 struct mfs_args { 271 char *fspec; /* name to export for statfs */ 272 struct export_args export; /* if exported MFSes are supported */ 273 caddr_t base; /* base of file system in memory */ 274 u_long size; /* size of file system */ 275 }; 276 #endif /* MFS */ 277 278 #ifdef ISOFS 279 /* 280 * Arguments to mount ISO 9660 filesystems. 281 */ 282 struct iso_args { 283 char *fspec; /* block special device to mount */ 284 struct export_args export; /* network export info */ 285 int flags; /* mounting flags, see below */ 286 287 }; 288 #define ISOFSMNT_NORRIP 0x00000001 /* disable Rock Ridge Ext.*/ 289 #define ISOFSMNT_GENS 0x00000002 /* enable generation numbers */ 290 #define ISOFSMNT_EXTATT 0x00000004 /* enable extended attributes */ 291 #define ISOFSMNT_NOTRANS 0x00000008 /* disable filename translation */ 292 #endif /* ISOFS */ 293 294 #ifdef NFS 295 /* 296 * File Handle (32 bytes for version 2), variable up to 1024 for version 3 297 */ 298 union nfsv2fh { 299 fhandle_t fh_generic; 300 u_char fh_bytes[32]; 301 }; 302 typedef union nfsv2fh nfsv2fh_t; 303 304 /* 305 * Arguments to mount NFS 306 */ 307 struct nfs_args { 308 struct sockaddr *addr; /* file server address */ 309 int addrlen; /* length of address */ 310 int sotype; /* Socket type */ 311 int proto; /* and Protocol */ 312 nfsv2fh_t *fh; /* File handle to be mounted */ 313 int flags; /* flags */ 314 int wsize; /* write size in bytes */ 315 int rsize; /* read size in bytes */ 316 int timeo; /* initial timeout in .1 secs */ 317 int retrans; /* times to retry send */ 318 int maxgrouplist; /* Max. size of group list */ 319 int readahead; /* # of blocks to readahead */ 320 int leaseterm; /* Term (sec) of lease */ 321 int deadthresh; /* Retrans threshold */ 322 char *hostname; /* server's name */ 323 }; 324 325 326 /* 327 * NFS mount option flags 328 */ 329 #define NFSMNT_SOFT 0x00000001 /* soft mount (hard is default) */ 330 #define NFSMNT_WSIZE 0x00000002 /* set write size */ 331 #define NFSMNT_RSIZE 0x00000004 /* set read size */ 332 #define NFSMNT_TIMEO 0x00000008 /* set initial timeout */ 333 #define NFSMNT_RETRANS 0x00000010 /* set number of request retrys */ 334 #define NFSMNT_MAXGRPS 0x00000020 /* set maximum grouplist size */ 335 #define NFSMNT_INT 0x00000040 /* allow interrupts on hard mount */ 336 #define NFSMNT_NOCONN 0x00000080 /* Don't Connect the socket */ 337 #define NFSMNT_NQNFS 0x00000100 /* Use Nqnfs protocol */ 338 #define NFSMNT_MYWRITE 0x00000200 /* Assume writes were mine */ 339 #define NFSMNT_KERB 0x00000400 /* Use Kerberos authentication */ 340 #define NFSMNT_DUMBTIMR 0x00000800 /* Don't estimate rtt dynamically */ 341 #define NFSMNT_RDIRALOOK 0x00001000 /* Do lookup with readdir (nqnfs) */ 342 #define NFSMNT_LEASETERM 0x00002000 /* set lease term (nqnfs) */ 343 #define NFSMNT_READAHEAD 0x00004000 /* set read ahead */ 344 #define NFSMNT_DEADTHRESH 0x00008000 /* set dead server retry thresh */ 345 #define NFSMNT_NQLOOKLEASE 0x00010000 /* Get lease for lookup */ 346 #define NFSMNT_RESVPORT 0x00020000 /* Allocate a reserved port */ 347 #define NFSMNT_INTERNAL 0xffe00000 /* Bits set internally */ 348 #define NFSMNT_MNTD 0x00200000 /* Mnt server for mnt point */ 349 #define NFSMNT_DISMINPROG 0x00400000 /* Dismount in progress */ 350 #define NFSMNT_DISMNT 0x00800000 /* Dismounted */ 351 #define NFSMNT_SNDLOCK 0x01000000 /* Send socket lock */ 352 #define NFSMNT_WANTSND 0x02000000 /* Want above */ 353 #define NFSMNT_RCVLOCK 0x04000000 /* Rcv socket lock */ 354 #define NFSMNT_WANTRCV 0x08000000 /* Want above */ 355 #define NFSMNT_WAITAUTH 0x10000000 /* Wait for authentication */ 356 #define NFSMNT_HASAUTH 0x20000000 /* Has authenticator */ 357 #define NFSMNT_WANTAUTH 0x40000000 /* Wants an authenticator */ 358 #define NFSMNT_AUTHERR 0x80000000 /* Authentication error */ 359 #endif /* NFS */ 360 361 #ifdef KERNEL 362 /* 363 * exported vnode operations 364 */ 365 struct mount *getvfs __P((fsid_t *)); /* return vfs given fsid */ 366 int vfs_export /* process mount export info */ 367 __P((struct mount *, struct netexport *, struct export_args *)); 368 struct netcred *vfs_export_lookup /* lookup host in fs export list */ 369 __P((struct mount *, struct netexport *, struct mbuf *)); 370 int vfs_lock __P((struct mount *)); /* lock a vfs */ 371 int vfs_mountedon __P((struct vnode *));/* is a vfs mounted on vp */ 372 void vfs_unlock __P((struct mount *)); /* unlock a vfs */ 373 extern TAILQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */ 374 extern struct vfsops *vfssw[]; /* filesystem type table */ 375 376 #else /* KERNEL */ 377 378 #include <sys/cdefs.h> 379 380 __BEGIN_DECLS 381 int fstatfs __P((int, struct statfs *)); 382 int getfh __P((const char *, fhandle_t *)); 383 int getfsstat __P((struct statfs *, long, int)); 384 int getmntinfo __P((struct statfs **, int)); 385 int mount __P((int, const char *, int, void *)); 386 int statfs __P((const char *, struct statfs *)); 387 int unmount __P((const char *, int)); 388 __END_DECLS 389 390 #endif /* KERNEL */ 391