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Diffstat (limited to 'sys/miscfs/umapfs/umap.h')
| -rw-r--r-- | sys/miscfs/umapfs/umap.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/sys/miscfs/umapfs/umap.h b/sys/miscfs/umapfs/umap.h new file mode 100644 index 0000000..9f4d1e7 --- /dev/null +++ b/sys/miscfs/umapfs/umap.h @@ -0,0 +1,92 @@ +/* + * Copyright (c) 1992, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software donated to Berkeley by + * the UCLA Ficus project. + * + * 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. + * + * @(#)umap.h 8.3 (Berkeley) 1/21/94 + * + * @(#)null_vnops.c 1.5 (Berkeley) 7/10/92 + */ + +#define MAPFILEENTRIES 64 +#define GMAPFILEENTRIES 16 +#define NOBODY 32767 +#define NULLGROUP 65534 + +struct umap_args { + char *target; /* Target of loopback */ + int nentries; /* # of entries in user map array */ + int gnentries; /* # of entries in group map array */ + u_long (*mapdata)[2]; /* pointer to array of user mappings */ + u_long (*gmapdata)[2]; /* pointer to array of group mappings */ +}; + +struct umap_mount { + struct mount *umapm_vfs; + struct vnode *umapm_rootvp; /* Reference to root umap_node */ + int info_nentries; /* number of uid mappings */ + int info_gnentries; /* number of gid mappings */ + u_long info_mapdata[MAPFILEENTRIES][2]; /* mapping data for + user mapping in ficus */ + u_long info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for + group mapping in ficus */ +}; + +#ifdef KERNEL +/* + * A cache of vnode references + */ +struct umap_node { + struct umap_node *umap_forw; /* Hash chain */ + struct umap_node *umap_back; + struct vnode *umap_lowervp; /* Aliased vnode - VREFed once */ + struct vnode *umap_vnode; /* Back pointer to vnode/umap_node */ +}; + +extern int umap_node_create __P((struct mount *mp, struct vnode *target, struct vnode **vpp)); +extern u_long umap_reverse_findid __P((u_long id, u_long map[][2], int nentries)); +extern void umap_mapids __P((struct mount *v_mount, struct ucred *credp)); + +#define MOUNTTOUMAPMOUNT(mp) ((struct umap_mount *)((mp)->mnt_data)) +#define VTOUMAP(vp) ((struct umap_node *)(vp)->v_data) +#define UMAPTOV(xp) ((xp)->umap_vnode) +#ifdef UMAPFS_DIAGNOSTIC +extern struct vnode *umap_checkvp __P((struct vnode *vp, char *fil, int lno)); +#define UMAPVPTOLOWERVP(vp) umap_checkvp((vp), __FILE__, __LINE__) +#else +#define UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp) +#endif + +extern int (**umap_vnodeop_p)(); +extern struct vfsops umap_vfsops; +#endif /* KERNEL */ |
