/* * Copyright (c) 1989, 1991, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)mount.h 8.13 (Berkeley) 3/27/94 * $Id: mount.h,v 1.29 1995/11/13 08:52:08 bde Exp $ */ #ifndef _SYS_MOUNT_H_ #define _SYS_MOUNT_H_ #ifndef KERNEL #include #endif #include typedef struct { long val[2]; } fsid_t; /* file system id type */ /* * File identifier. * These are unique per filesystem on a single machine. */ #define MAXFIDSZ 16 struct fid { u_short fid_len; /* length of data in bytes */ u_short fid_reserved; /* force longword alignment */ char fid_data[MAXFIDSZ]; /* data (variable length) */ }; /* * file system statistics */ #define MNAMELEN 90 /* length of buffer for returned name */ struct statfs { short f_type; /* type of filesystem (see below) */ short f_flags; /* copy of mount flags */ long f_bsize; /* fundamental file system block size */ long f_iosize; /* optimal transfer block size */ long f_blocks; /* total data blocks in file system */ long f_bfree; /* free blocks in fs */ long f_bavail; /* free blocks avail to non-superuser */ long f_files; /* total file nodes in file system */ long f_ffree; /* free file nodes in fs */ fsid_t f_fsid; /* file system id */ long f_spare[9]; /* spare for later */ char f_mntonname[MNAMELEN]; /* directory on which mounted */ char f_mntfromname[MNAMELEN];/* mounted filesystem */ }; /* * File system types. */ #define MOUNT_NONE 0 #define MOUNT_UFS 1 /* Fast Filesystem */ #define MOUNT_NFS 2 /* Sun-compatible Network Filesystem */ #define MOUNT_MFS 3 /* Memory-based Filesystem */ #define MOUNT_MSDOS 4 /* MS/DOS Filesystem */ #define MOUNT_LFS 5 /* Log-based Filesystem */ #define MOUNT_LOFS 6 /* Loopback Filesystem */ #define MOUNT_FDESC 7 /* File Descriptor Filesystem */ #define MOUNT_PORTAL 8 /* Portal Filesystem */ #define MOUNT_NULL 9 /* Minimal Filesystem Layer */ #define MOUNT_UMAP 10 /* User/Group Identifer Remapping Filesystem */ #define MOUNT_KERNFS 11 /* Kernel Information Filesystem */ #define MOUNT_PROCFS 12 /* /proc Filesystem */ #define MOUNT_AFS 13 /* Andrew Filesystem */ #define MOUNT_CD9660 14 /* ISO9660 (aka CDROM) Filesystem */ #define MOUNT_UNION 15 /* Union (translucent) Filesystem */ #define MOUNT_DEVFS 16 /* existing device Filesystem */ #define MOUNT_EXT2FS 17 /* Linux EXT2FS */ #define MOUNT_MAXTYPE 17 #define INITMOUNTNAMES { \ "none", /* 0 MOUNT_NONE */ \ "ufs", /* 1 MOUNT_UFS */ \ "nfs", /* 2 MOUNT_NFS */ \ "mfs", /* 3 MOUNT_MFS */ \ "msdos", /* 4 MOUNT_MSDOS */ \ "lfs", /* 5 MOUNT_LFS */ \ "lofs", /* 6 MOUNT_LOFS */ \ "fdesc", /* 7 MOUNT_FDESC */ \ "portal", /* 8 MOUNT_PORTAL */ \ "null", /* 9 MOUNT_NULL */ \ "umap", /* 10 MOUNT_UMAP */ \ "kernfs", /* 11 MOUNT_KERNFS */ \ "procfs", /* 12 MOUNT_PROCFS */ \ "afs", /* 13 MOUNT_AFS */ \ "cd9660", /* 14 MOUNT_CD9660 */ \ "union", /* 15 MOUNT_UNION */ \ "devfs", /* 16 MOUNT_DEVFS */ \ "ext2fs", /* 17 MOUNT_EXT2FS */ \ 0, /* 17 MOUNT_SPARE */ \ } /* * Structure per mounted file system. Each mounted file system has an * array of operations and an instance record. The file systems are * put on a doubly linked list. */ LIST_HEAD(vnodelst, vnode); struct mount { CIRCLEQ_ENTRY(mount) mnt_list; /* mount list */ struct vfsops *mnt_op; /* operations on fs */ struct vfsconf *mnt_vfc; /* configuration info */ struct vnode *mnt_vnodecovered; /* vnode we mounted on */ struct vnodelst mnt_vnodelist; /* list of vnodes this mount */ int mnt_flag; /* flags */ int mnt_maxsymlinklen; /* max size of short symlink */ struct statfs mnt_stat; /* cache of filesystem stats */ qaddr_t mnt_data; /* private data */ /* struct vfsconf *mnt_vfc; */ /* configuration info */ time_t mnt_time; /* last time written*/ }; /* * Mount flags. * * Unmount uses MNT_FORCE flag. */ #define MNT_RDONLY 0x00000001 /* read only filesystem */ #define MNT_SYNCHRONOUS 0x00000002 /* file system written synchronously */ #define MNT_NOEXEC 0x00000004 /* can't exec from filesystem */ #define MNT_NOSUID 0x00000008 /* don't honor setuid bits on fs */ #define MNT_NODEV 0x00000010 /* don't interpret special files */ #define MNT_UNION 0x00000020 /* union with underlying filesystem */ #define MNT_ASYNC 0x00000040 /* file system written asynchronously */ /* * exported mount flags. */ #define MNT_EXRDONLY 0x00000080 /* exported read only */ #define MNT_EXPORTED 0x00000100 /* file system is exported */ #define MNT_DEFEXPORTED 0x00000200 /* exported to the world */ #define MNT_EXPORTANON 0x00000400 /* use anon uid mapping for everyone */ #define MNT_EXKERB 0x00000800 /* exported with Kerberos uid mapping */ /* * Flags set by internal operations. */ #define MNT_LOCAL 0x00001000 /* filesystem is stored locally */ #define MNT_QUOTA 0x00002000 /* quotas are enabled on filesystem */ #define MNT_ROOTFS 0x00004000 /* identifies the root filesystem */ #define MNT_USER 0x00008000 /* mounted by a user */ /* * Mask of flags that are visible to statfs() */ #define MNT_VISFLAGMASK 0x0000ffff /* * filesystem control flags. * * MNT_MLOCK lock the mount entry so that name lookup cannot proceed * past the mount point. This keeps the subtree stable during mounts * and unmounts. */ #define MNT_UPDATE 0x00010000 /* not a real mount, just an update */ #define MNT_DELEXPORT 0x00020000 /* delete export host lists */ #define MNT_RELOAD 0x00040000 /* reload filesystem data */ #define MNT_FORCE 0x00080000 /* force unmount or readonly change */ #define MNT_MLOCK 0x00100000 /* lock so that subtree is stable */ #define MNT_MWAIT 0x00200000 /* someone is waiting for lock */ #define MNT_MPBUSY 0x00400000 /* scan of mount point in progress */ #define MNT_MPWANT 0x00800000 /* waiting for mount point */ #define MNT_UNMOUNT 0x01000000 /* unmount in progress */ #define MNT_WANTRDWR 0x02000000 /* want upgrade to read/write */ /* * used to get configured filesystems information */ #define VFS_MAXNAMELEN 32 struct vfsconf { void *vfc_vfsops; char vfc_name[VFS_MAXNAMELEN]; int vfc_index; int vfc_refcount; int vfc_flags; }; /* * NB: these flags refer to IMPLEMENTATION properties, not properties of * any actual mounts; i.e., it does not make sense to change the flags. */ #define VFCF_STATIC 0x00000001 /* statically compiled into kernel */ #define VFCF_NETWORK 0x00000002 /* may get data over the network */ #define VFCF_READONLY 0x00000004 /* writes are not implemented */ #define VFCF_SYNTHETIC 0x00000008 /* data does not represent real files */ #define VFCF_LOOPBACK 0x00000010 /* aliases some other mounted FS */ #define VFCF_UNICODE 0x00000020 /* stores file names as Unicode*/ /* * Operations supported on mounted file system. */ #ifdef KERNEL extern int doforce; /* Flag to permit forcible unmounting. */ extern struct vfsconf void_vfsconf; extern struct vfsconf *vfsconf[]; #ifdef __STDC__ struct nameidata; struct mbuf; #endif struct vfsops { int (*vfs_mount) __P((struct mount *mp, char *path, caddr_t data, struct nameidata *ndp, struct proc *p)); int (*vfs_start) __P((struct mount *mp, int flags, struct proc *p)); int (*vfs_unmount) __P((struct mount *mp, int mntflags, struct proc *p)); int (*vfs_root) __P((struct mount *mp, struct vnode **vpp)); int (*vfs_quotactl) __P((struct mount *mp, int cmds, uid_t uid, caddr_t arg, struct proc *p)); int (*vfs_statfs) __P((struct mount *mp, struct statfs *sbp, struct proc *p)); int (*vfs_sync) __P((struct mount *mp, int waitfor, struct ucred *cred, struct proc *p)); int (*vfs_vget) __P((struct mount *mp, ino_t ino, struct vnode **vpp)); int (*vfs_fhtovp) __P((struct mount *mp, struct fid *fhp, struct mbuf *nam, struct vnode **vpp, int *exflagsp, struct ucred **credanonp)); int (*vfs_vptofh) __P((struct vnode *vp, struct fid *fhp)); int (*vfs_init) __P((void)); }; #define VFS_MOUNT(MP, PATH, DATA, NDP, P) \ (*(MP)->mnt_op->vfs_mount)(MP, PATH, DATA, NDP, P) #define VFS_START(MP, FLAGS, P) (*(MP)->mnt_op->vfs_start)(MP, FLAGS, P) #define VFS_UNMOUNT(MP, FORCE, P) (*(MP)->mnt_op->vfs_unmount)(MP, FORCE, P) #define VFS_ROOT(MP, VPP) (*(MP)->mnt_op->vfs_root)(MP, VPP) #define VFS_QUOTACTL(MP,C,U,A,P) (*(MP)->mnt_op->vfs_quotactl)(MP, C, U, A, P) #define VFS_STATFS(MP, SBP, P) (*(MP)->mnt_op->vfs_statfs)(MP, SBP, P) #define VFS_SYNC(MP, WAIT, C, P) (*(MP)->mnt_op->vfs_sync)(MP, WAIT, C, P) #define VFS_VGET(MP, INO, VPP) (*(MP)->mnt_op->vfs_vget)(MP, INO, VPP) #define VFS_FHTOVP(MP, FIDP, NAM, VPP, EXFLG, CRED) \ (*(MP)->mnt_op->vfs_fhtovp)(MP, FIDP, NAM, VPP, EXFLG, CRED) #define VFS_VPTOFH(VP, FIDP) (*(VP)->v_mount->mnt_op->vfs_vptofh)(VP, FIDP) #ifdef VFS_LKM #include #include #include #include #define VFS_SET(vfsops, fsname, index, flags) \ static struct vfsconf _fs_vfsconf = { \ &vfsops, \ #fsname, \ index, \ 0, \ flags \ }; \ extern struct linker_set MODVNOPS; \ MOD_VFS(#fsname,index,&MODVNOPS,&_fs_vfsconf); \ int \ fsname ## _mod(struct lkm_table *lkmtp, int cmd, int ver) { \ DISPATCH(lkmtp, cmd, ver, lkm_nullcmd, lkm_nullcmd, lkm_nullcmd); } #else #define VFS_SET(vfsops, fsname, index, flags) \ static struct vfsconf _fs_vfsconf = { \ &vfsops, \ #fsname, \ index, \ 0, \ flags | VFCF_STATIC \ }; \ DATA_SET(vfs_set,_fs_vfsconf) #endif /* VFS_LKM */ #endif /* KERNEL */ /* * Flags for various system call interfaces. * * waitfor flags to vfs_sync() and getfsstat() */ #define MNT_WAIT 1 #define MNT_NOWAIT 2 /* * Generic file handle */ struct fhandle { fsid_t fh_fsid; /* File system id of mount point */ struct fid fh_fid; /* File sys specific id */ }; typedef struct fhandle fhandle_t; #ifdef KERNEL #include #include /* XXX for AF_MAX */ /* * Network address lookup element */ struct netcred { struct radix_node netc_rnodes[2]; int netc_exflags; struct ucred netc_anon; }; /* * Network export information */ struct netexport { struct netcred ne_defexported; /* Default export */ struct radix_node_head *ne_rtable[AF_MAX+1]; /* Individual exports */ }; #endif /* KERNEL */ /* * Export arguments for local filesystem mount calls. */ struct export_args { int ex_flags; /* export related flags */ uid_t ex_root; /* mapping for root uid */ struct ucred ex_anon; /* mapping for anonymous user */ struct sockaddr *ex_addr; /* net address to which exported */ int ex_addrlen; /* and the net address length */ struct sockaddr *ex_mask; /* mask of valid bits in saddr */ int ex_masklen; /* and the smask length */ }; /* * Arguments to mount UFS-based filesystems */ struct ufs_args { char *fspec; /* block special device to mount */ struct export_args export; /* network export information */ }; #ifdef MFS /* * Arguments to mount MFS */ struct mfs_args { char *fspec; /* name to export for statfs */ struct export_args export; /* if exported MFSes are supported */ caddr_t base; /* base of file system in memory */ u_long size; /* size of file system */ }; #endif /* MFS */ #ifdef MSDOSFS /* * Arguments to mount MSDOS filesystems. */ struct msdosfs_args { char *fspec; /* blocks special holding the fs to mount */ struct export_args export; /* network export information */ uid_t uid; /* uid that owns msdosfs files */ gid_t gid; /* gid that owns msdosfs files */ mode_t mask; /* mask to be applied for msdosfs perms */ }; #endif #ifdef CD9660 /* * Arguments to mount ISO 9660 filesystems. */ struct iso_args { char *fspec; /* block special device to mount */ struct export_args export; /* network export info */ int flags; /* mounting flags, see below */ }; #define ISOFSMNT_NORRIP 0x00000001 /* disable Rock Ridge Ext.*/ #define ISOFSMNT_GENS 0x00000002 /* enable generation numbers */ #define ISOFSMNT_EXTATT 0x00000004 /* enable extended attributes */ #endif /* CD9660 */ #ifdef NFS /* * Arguments to mount NFS */ struct nfs_args { struct sockaddr *addr; /* file server address */ int addrlen; /* length of address */ int sotype; /* Socket type */ int proto; /* and Protocol */ u_char *fh; /* File handle to be mounted */ int fhsize; /* Size, in bytes, of fh */ int flags; /* flags */ int wsize; /* write size in bytes */ int rsize; /* read size in bytes */ int readdirsize; /* readdir size in bytes */ int timeo; /* initial timeout in .1 secs */ int retrans; /* times to retry send */ int maxgrouplist; /* Max. size of group list */ int readahead; /* # of blocks to readahead */ int leaseterm; /* Term (sec) of lease */ int deadthresh; /* Retrans threshold */ char *hostname; /* server's name */ }; /* * NFS mount option flags */ #define NFSMNT_SOFT 0x00000001 /* soft mount (hard is default) */ #define NFSMNT_WSIZE 0x00000002 /* set write size */ #define NFSMNT_RSIZE 0x00000004 /* set read size */ #define NFSMNT_TIMEO 0x00000008 /* set initial timeout */ #define NFSMNT_RETRANS 0x00000010 /* set number of request retrys */ #define NFSMNT_MAXGRPS 0x00000020 /* set maximum grouplist size */ #define NFSMNT_INT 0x00000040 /* allow interrupts on hard mount */ #define NFSMNT_NOCONN 0x00000080 /* Don't Connect the socket */ #define NFSMNT_NQNFS 0x00000100 /* Use Nqnfs protocol */ #define NFSMNT_NFSV3 0x00000200 /* Use NFS Version 3 protocol */ #define NFSMNT_KERB 0x00000400 /* Use Kerberos authentication */ #define NFSMNT_DUMBTIMR 0x00000800 /* Don't estimate rtt dynamically */ #define NFSMNT_LEASETERM 0x00001000 /* set lease term (nqnfs) */ #define NFSMNT_READAHEAD 0x00002000 /* set read ahead */ #define NFSMNT_DEADTHRESH 0x00004000 /* set dead server retry thresh */ #define NFSMNT_RESVPORT 0x00008000 /* Allocate a reserved port */ #define NFSMNT_RDIRPLUS 0x00010000 /* Use Readdirplus for V3 */ #define NFSMNT_READDIRSIZE 0x00020000 /* Set readdir size */ #define NFSMNT_INTERNAL 0xfffc0000 /* Bits set internally */ #define NFSMNT_HASWRITEVERF 0x00040000 /* Has write verifier for V3 */ #define NFSMNT_GOTPATHCONF 0x00080000 /* Got the V3 pathconf info */ #define NFSMNT_GOTFSINFO 0x00100000 /* Got the V3 fsinfo */ #define NFSMNT_MNTD 0x00200000 /* Mnt server for mnt point */ #define NFSMNT_DISMINPROG 0x00400000 /* Dismount in progress */ #define NFSMNT_DISMNT 0x00800000 /* Dismounted */ #define NFSMNT_SNDLOCK 0x01000000 /* Send socket lock */ #define NFSMNT_WANTSND 0x02000000 /* Want above */ #define NFSMNT_RCVLOCK 0x04000000 /* Rcv socket lock */ #define NFSMNT_WANTRCV 0x08000000 /* Want above */ #define NFSMNT_WAITAUTH 0x10000000 /* Wait for authentication */ #define NFSMNT_HASAUTH 0x20000000 /* Has authenticator */ #define NFSMNT_WANTAUTH 0x40000000 /* Wants an authenticator */ #define NFSMNT_AUTHERR 0x80000000 /* Authentication error */ #endif /* NFS */ #ifdef KERNEL extern int (*mountroot) __P((void *)); extern struct vfsops *mountrootvfsops; /* * exported vnode operations */ int dounmount __P((struct mount *, int, struct proc *)); struct mount *getvfs __P((fsid_t *)); /* return vfs given fsid */ void getnewfsid __P((struct mount *, int)); int vflush __P((struct mount *, struct vnode *, int)); int vfs_export /* process mount export info */ __P((struct mount *, struct netexport *, struct export_args *)); struct netcred *vfs_export_lookup /* lookup host in fs export list */ __P((struct mount *, struct netexport *, struct mbuf *)); int vfs_lock __P((struct mount *)); /* lock a vfs */ int vfs_mountedon __P((struct vnode *)); /* is a vfs mounted on vp */ int vfs_mountroot __P((void *)); /* XXX goes away? */ void vfs_msync __P((struct mount *, int)); void vfs_unlock __P((struct mount *)); /* unlock a vfs */ void vfs_unmountall __P((void)); int vfs_busy __P((struct mount *)); /* mark a vfs busy */ void vfs_unbusy __P((struct mount *)); /* mark a vfs not busy */ extern CIRCLEQ_HEAD(mntlist, mount) mountlist; /* mounted filesystem list */ extern struct vfsops *vfssw[]; /* filesystem type table */ #else /* KERNEL */ #include __BEGIN_DECLS int fstatfs __P((int, struct statfs *)); int getfh __P((const char *, fhandle_t *)); int getfsstat __P((struct statfs *, long, int)); int getmntinfo __P((struct statfs **, int)); int mount __P((int, const char *, int, void *)); int statfs __P((const char *, struct statfs *)); int unmount __P((const char *, int)); /* C library stuff */ struct vfsconf *getvfsbyname __P((const char *)); struct vfsconf *getvfsbytype __P((int)); struct vfsconf *getvfsent __P((void)); void setvfsent __P((int)); void endvfsent __P((void)); int vfsisloadable __P((const char *)); int vfsload __P((const char *)); __END_DECLS #endif /* KERNEL */ #endif /* !_SYS_MOUNT_H_ */