diff --git a/sys/sys/mount.h b/sys/sys/mount.h index 4580650fd28a..c303d5792370 100644 --- a/sys/sys/mount.h +++ b/sys/sys/mount.h @@ -1,526 +1,528 @@ /* * 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 1.32 1996/09/03 07:09:09 davidg Exp $ + * $Id: mount.h,v 1.33 1996/09/12 03:16:34 bde Exp $ */ #ifndef _SYS_MOUNT_H_ #define _SYS_MOUNT_H_ #ifndef KERNEL #include #endif #include typedef struct fsid { 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 { long f_spare2; /* placeholder */ 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 */ uid_t f_owner; /* user that mounted the filesystem */ int f_type; /* type of filesystem (see below) */ int f_flags; /* copy of mount flags */ long f_spare[6]; /* 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 Identifier 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 MOUNT_TFS 18 /* Netcon Novell filesystem */ +#define MOUNT_MAXTYPE 18 #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 */ \ + "tfs", /* 18 MOUNT_TFS */ \ + 0, /* 18 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 */ #define MNT_NOATIME 0x10000000 /* Disable update of file access times */ /* * 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 (MNT_RDONLY|MNT_SYNCHRONOUS|MNT_NOEXEC|MNT_NOSUID| \ MNT_NODEV|MNT_UNION|MNT_ASYNC|MNT_EXRDONLY|MNT_EXPORTED| \ MNT_DEFEXPORTED|MNT_EXPORTANON|MNT_EXKERB|MNT_LOCAL| \ MNT_QUOTA|MNT_ROOTFS|MNT_USER|MNT_NOATIME) /* * 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_ */ diff --git a/sys/sys/vnode.h b/sys/sys/vnode.h index fc03e73ed96b..fdf0b9af76af 100644 --- a/sys/sys/vnode.h +++ b/sys/sys/vnode.h @@ -1,435 +1,435 @@ /* * Copyright (c) 1989, 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. * * @(#)vnode.h 8.7 (Berkeley) 2/4/94 - * $Id: vnode.h,v 1.34 1996/08/21 21:56:01 dyson Exp $ + * $Id: vnode.h,v 1.35 1996/10/15 19:22:46 bde Exp $ */ #ifndef _SYS_VNODE_H_ #define _SYS_VNODE_H_ #include /* * The vnode is the focus of all file activity in UNIX. There is a * unique vnode allocated for each active file, each current directory, * each mounted-on file, text file, and the root. */ /* * Vnode types. VNON means no type. */ enum vtype { VNON, VREG, VDIR, VBLK, VCHR, VLNK, VSOCK, VFIFO, VBAD }; /* * Vnode tag types. * These are for the benefit of external programs only (e.g., pstat) * and should NEVER be inspected by the kernel. */ enum vtagtype { VT_NON, VT_UFS, VT_NFS, VT_MFS, VT_PC, VT_LFS, VT_LOFS, VT_FDESC, VT_PORTAL, VT_NULL, VT_UMAP, VT_KERNFS, VT_PROCFS, VT_AFS, VT_ISOFS, - VT_UNION, VT_MSDOSFS, VT_DEVFS + VT_UNION, VT_MSDOSFS, VT_DEVFS, VT_TFS }; /* * Each underlying filesystem allocates its own private area and hangs * it from v_data. If non-null, this area is freed in getnewvnode(). */ LIST_HEAD(buflists, buf); typedef int vop_t __P((void *)); struct vm_object; struct vnode { u_long v_flag; /* vnode flags (see below) */ int v_usecount; /* reference count of users */ int v_writecount; /* reference count of writers */ int v_holdcnt; /* page & buffer references */ daddr_t v_lastr; /* last read (read-ahead) */ u_long v_id; /* capability identifier */ struct mount *v_mount; /* ptr to vfs we are in */ vop_t **v_op; /* vnode operations vector */ TAILQ_ENTRY(vnode) v_freelist; /* vnode freelist */ LIST_ENTRY(vnode) v_mntvnodes; /* vnodes for mount point */ struct buflists v_cleanblkhd; /* clean blocklist head */ struct buflists v_dirtyblkhd; /* dirty blocklist head */ long v_numoutput; /* num of writes in progress */ enum vtype v_type; /* vnode type */ union { struct mount *vu_mountedhere;/* ptr to mounted vfs (VDIR) */ struct socket *vu_socket; /* unix ipc (VSOCK) */ struct specinfo *vu_specinfo; /* device (VCHR, VBLK) */ struct fifoinfo *vu_fifoinfo; /* fifo (VFIFO) */ } v_un; struct nqlease *v_lease; /* Soft reference to lease */ daddr_t v_lastw; /* last write (write cluster) */ daddr_t v_cstart; /* start block of cluster */ daddr_t v_lasta; /* last allocation */ int v_clen; /* length of current cluster */ int v_ralen; /* Read-ahead length */ int v_usage; /* Vnode usage counter */ daddr_t v_maxra; /* last readahead block */ struct vm_object *v_object; /* Place to store VM object */ enum vtagtype v_tag; /* type of underlying data */ void *v_data; /* private data for fs */ }; #define v_mountedhere v_un.vu_mountedhere #define v_socket v_un.vu_socket #define v_specinfo v_un.vu_specinfo #define v_fifoinfo v_un.vu_fifoinfo /* * Vnode flags. */ #define VROOT 0x0001 /* root of its file system */ #define VTEXT 0x0002 /* vnode is a pure text prototype */ #define VSYSTEM 0x0004 /* vnode being used by kernel */ #define VOLOCK 0x0008 /* vnode is locked waiting for an object */ #define VOWANT 0x0010 /* a process is waiting for VOLOCK */ #define VXLOCK 0x0100 /* vnode is locked to change underlying type */ #define VXWANT 0x0200 /* process is waiting for vnode */ #define VBWAIT 0x0400 /* waiting for output to complete */ #define VALIASED 0x0800 /* vnode has an alias */ #define VDIROP 0x1000 /* LFS: vnode is involved in a directory op */ #define VVMIO 0x2000 /* VMIO flag */ #define VNINACT 0x4000 /* LFS: skip ufs_inactive() in lfs_vunref */ #define VAGE 0x8000 /* Insert vnode at head of free list */ /* * Vnode attributes. A field value of VNOVAL represents a field whose value * is unavailable (getattr) or which is not to be changed (setattr). */ struct vattr { enum vtype va_type; /* vnode type (for create) */ u_short va_mode; /* files access mode and type */ short va_nlink; /* number of references to file */ uid_t va_uid; /* owner user id */ gid_t va_gid; /* owner group id */ long va_fsid; /* file system id (dev for now) */ long va_fileid; /* file id */ u_quad_t va_size; /* file size in bytes */ long va_blocksize; /* blocksize preferred for i/o */ struct timespec va_atime; /* time of last access */ struct timespec va_mtime; /* time of last modification */ struct timespec va_ctime; /* time file changed */ u_long va_gen; /* generation number of file */ u_long va_flags; /* flags defined for file */ dev_t va_rdev; /* device the special file represents */ u_quad_t va_bytes; /* bytes of disk space held by file */ u_quad_t va_filerev; /* file modification number */ u_int va_vaflags; /* operations flags, see below */ long va_spare; /* remain quad aligned */ }; /* * Flags for va_cflags. */ #define VA_UTIMES_NULL 0x01 /* utimes argument was NULL */ /* * Flags for ioflag. */ #define IO_UNIT 0x01 /* do I/O as atomic unit */ #define IO_APPEND 0x02 /* append write to end */ #define IO_SYNC 0x04 /* do I/O synchronously */ #define IO_NODELOCKED 0x08 /* underlying node already locked */ #define IO_NDELAY 0x10 /* FNDELAY flag set in file table */ #define IO_VMIO 0x20 /* data already in VMIO space */ /* * Modes. Some values same as Ixxx entries from inode.h for now. */ #define VSUID 04000 /* set user id on execution */ #define VSGID 02000 /* set group id on execution */ #define VSVTX 01000 /* save swapped text even after use */ #define VREAD 00400 /* read, write, execute permissions */ #define VWRITE 00200 #define VEXEC 00100 /* * Token indicating no attribute value yet assigned. */ #define VNOVAL (-1) #ifdef KERNEL /* * Convert between vnode types and inode formats (since POSIX.1 * defines mode word of stat structure in terms of inode formats). */ extern enum vtype iftovt_tab[]; extern int vttoif_tab[]; #define IFTOVT(mode) (iftovt_tab[((mode) & S_IFMT) >> 12]) #define VTTOIF(indx) (vttoif_tab[(int)(indx)]) #define MAKEIMODE(indx, mode) (int)(VTTOIF(indx) | (mode)) /* * Flags to various vnode functions. */ #define SKIPSYSTEM 0x0001 /* vflush: skip vnodes marked VSYSTEM */ #define FORCECLOSE 0x0002 /* vflush: force file closure */ #define WRITECLOSE 0x0004 /* vflush: only close writable files */ #define DOCLOSE 0x0008 /* vclean: close active files */ #define V_SAVE 0x0001 /* vinvalbuf: sync file first */ #define V_SAVEMETA 0x0002 /* vinvalbuf: leave indirect blocks */ #ifdef DIAGNOSTIC #define HOLDRELE(vp) holdrele(vp) #define VATTR_NULL(vap) vattr_null(vap) #define VHOLD(vp) vhold(vp) #define VREF(vp) vref(vp) void holdrele __P((struct vnode *)); void vhold __P((struct vnode *)); #else #define HOLDRELE(vp) (vp)->v_holdcnt-- /* decrease buf or page ref */ #define VATTR_NULL(vap) (*(vap) = va_null) /* initialize a vattr */ #define VHOLD(vp) (vp)->v_holdcnt++ /* increase buf or page ref */ #define VREF(vp) vref(vp) /* increase reference */ #endif #define NULLVP ((struct vnode *)NULL) #ifdef VFS_LKM #define VNODEOP_SET(f) DATA_SET(MODVNOPS,f) #else #define VNODEOP_SET(f) DATA_SET(vfs_opv_descs_,f) #endif /* * Global vnode data. */ extern struct vnode *rootvnode; /* root (i.e. "/") vnode */ extern int desiredvnodes; /* number of vnodes desired */ extern int extravnodes; /* extra vnodes to allocate at boot */ extern int prtactive; /* nonzero to call vprint() */ extern struct vattr va_null; /* predefined null vattr structure */ /* * Macro/function to check for client cache inconsistency w.r.t. leasing. */ #define LEASE_READ 0x1 /* Check lease for readers */ #define LEASE_WRITE 0x2 /* Check lease for modifiers */ extern void (*lease_check) __P((struct vnode *vp, struct proc *p, struct ucred *ucred, int flag)); extern void (*lease_updatetime) __P((int deltat)); #ifdef NFS #ifdef NQNFS #define LEASE_CHECK(vp, p, cred, flag) lease_check((vp), (p), (cred), (flag)) #define LEASE_UPDATETIME(dt) lease_updatetime(dt) #else #define LEASE_CHECK(vp, p, cred, flag) #define LEASE_UPDATETIME(dt) #endif /* NQNFS */ #else #define LEASE_CHECK(vp, p, cred, flag) \ do { if(lease_check) lease_check((vp), (p), (cred), (flag)); } while(0) #define LEASE_UPDATETIME(dt) \ do { if(lease_updatetime) lease_updatetime(dt); } while(0) #endif /* NFS */ #endif /* KERNEL */ /* * Mods for extensibility. */ /* * Flags for vdesc_flags: */ #define VDESC_MAX_VPS 16 /* Low order 16 flag bits are reserved for willrele flags for vp arguments. */ #define VDESC_VP0_WILLRELE 0x0001 #define VDESC_VP1_WILLRELE 0x0002 #define VDESC_VP2_WILLRELE 0x0004 #define VDESC_VP3_WILLRELE 0x0008 #define VDESC_NOMAP_VPP 0x0100 #define VDESC_VPP_WILLRELE 0x0200 /* * VDESC_NO_OFFSET is used to identify the end of the offset list * and in places where no such field exists. */ #define VDESC_NO_OFFSET -1 /* * This structure describes the vnode operation taking place. */ struct vnodeop_desc { int vdesc_offset; /* offset in vector--first for speed */ char *vdesc_name; /* a readable name for debugging */ int vdesc_flags; /* VDESC_* flags */ /* * These ops are used by bypass routines to map and locate arguments. * Creds and procs are not needed in bypass routines, but sometimes * they are useful to (for example) transport layers. * Nameidata is useful because it has a cred in it. */ int *vdesc_vp_offsets; /* list ended by VDESC_NO_OFFSET */ int vdesc_vpp_offset; /* return vpp location */ int vdesc_cred_offset; /* cred location, if any */ int vdesc_proc_offset; /* proc location, if any */ int vdesc_componentname_offset; /* if any */ /* * Finally, we've got a list of private data (about each operation) * for each transport layer. (Support to manage this list is not * yet part of BSD.) */ caddr_t *vdesc_transports; }; #ifdef KERNEL /* * A list of all the operation descs. */ extern struct vnodeop_desc *vnodeop_descs[]; /* * This macro is very helpful in defining those offsets in the vdesc struct. * * This is stolen from X11R4. I ignored all the fancy stuff for * Crays, so if you decide to port this to such a serious machine, * you might want to consult Intrinsic.h's XtOffset{,Of,To}. */ #define VOPARG_OFFSET(p_type,field) \ ((int) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL))) #define VOPARG_OFFSETOF(s_type,field) \ VOPARG_OFFSET(s_type*,field) #define VOPARG_OFFSETTO(S_TYPE,S_OFFSET,STRUCT_P) \ ((S_TYPE)(((char*)(STRUCT_P))+(S_OFFSET))) /* * This structure is used to configure the new vnodeops vector. */ struct vnodeopv_entry_desc { struct vnodeop_desc *opve_op; /* which operation this is */ vop_t *opve_impl; /* code implementing this operation */ }; struct vnodeopv_desc { /* ptr to the ptr to the vector where op should go */ vop_t ***opv_desc_vector_p; struct vnodeopv_entry_desc *opv_desc_ops; /* null terminated list */ }; /* * A default routine which just returns an error. */ int vn_default_error __P((void)); /* * A generic structure. * This can be used by bypass routines to identify generic arguments. */ struct vop_generic_args { struct vnodeop_desc *a_desc; /* other random data follows, presumably */ }; /* * VOCALL calls an op given an ops vector. We break it out because BSD's * vclean changes the ops vector and then wants to call ops with the old * vector. */ #define VOCALL(OPSV,OFF,AP) (( *((OPSV)[(OFF)])) (AP)) /* * This call works for vnodes in the kernel. */ #define VCALL(VP,OFF,AP) VOCALL((VP)->v_op,(OFF),(AP)) #define VDESC(OP) (& __CONCAT(OP,_desc)) #define VOFFSET(OP) (VDESC(OP)->vdesc_offset) /* * Finally, include the default set of vnode operations. */ #include "vnode_if.h" /* * Public vnode manipulation functions. */ struct componentname; struct file; struct mount; struct nameidata; struct proc; struct stat; struct ucred; struct uio; struct vattr; struct vnode; struct vop_bwrite_args; int bdevvp __P((dev_t dev, struct vnode **vpp)); /* cache_* may belong in namei.h. */ void cache_enter __P((struct vnode *dvp, struct vnode *vp, struct componentname *cnp)); int cache_lookup __P((struct vnode *dvp, struct vnode **vpp, struct componentname *cnp)); void cache_purge __P((struct vnode *vp)); void cache_purgevfs __P((struct mount *mp)); struct vnode * checkalias __P((struct vnode *vp, dev_t nvp_rdev, struct mount *mp)); int getnewvnode __P((enum vtagtype tag, struct mount *mp, vop_t **vops, struct vnode **vpp)); void insmntque __P((struct vnode *vp, struct mount *mp)); void vattr_null __P((struct vattr *vap)); int vcount __P((struct vnode *vp)); int vfinddev __P((dev_t dev, enum vtype type, struct vnode **vpp)); void vfs_opv_init __P((struct vnodeopv_desc **them)); int vget __P((struct vnode *vp, int lockflag)); void vgone __P((struct vnode *vp)); void vgoneall __P((struct vnode *vp)); int vinvalbuf __P((struct vnode *vp, int save, struct ucred *cred, struct proc *p, int slpflag, int slptimeo)); int vn_bwrite __P((struct vop_bwrite_args *ap)); int vn_close __P((struct vnode *vp, int flags, struct ucred *cred, struct proc *p)); int vn_open __P((struct nameidata *ndp, int fmode, int cmode)); int vn_rdwr __P((enum uio_rw rw, struct vnode *vp, caddr_t base, int len, off_t offset, enum uio_seg segflg, int ioflg, struct ucred *cred, int *aresid, struct proc *p)); int vn_stat __P((struct vnode *vp, struct stat *sb, struct proc *p)); int vfs_object_create __P((struct vnode *vp, struct proc *p, struct ucred *cred, int waslocked)); int vn_writechk __P((struct vnode *vp)); void vprint __P((char *label, struct vnode *vp)); void vput __P((struct vnode *vp)); void vref __P((struct vnode *vp)); void vrele __P((struct vnode *vp)); #endif /* KERNEL */ #endif /* !_SYS_VNODE_H_ */