aec0fb7b40
initializations but we did have lofty goals and big ideals. Adjust to more contemporary circumstances and gain type checking. Replace the entire vop_t frobbing thing with properly typed structures. The only casualty is that we can not add a new VOP_ method with a loadable module. History has not given us reason to belive this would ever be feasible in the the first place. Eliminate in toto VOCALL(), vop_t, VNODEOP_SET() etc. Give coda correct prototypes and function definitions for all vop_()s. Generate a bit more data from the vnode_if.src file: a struct vop_vector and protype typedefs for all vop methods. Add a new vop_bypass() and make vop_default be a pointer to another struct vop_vector. Remove a lot of vfs_init since vop_vector is ready to use from the compiler. Cast various vop_mumble() to void * with uppercase name, for instance VOP_PANIC, VOP_NULL etc. Implement VCALL() by making vdesc_offset the offsetof() the relevant function pointer in vop_vector. This is disgusting but since the code is generated by a script comparatively safe. The alternative for nullfs etc. would be much worse. Fix up all vnode method vectors to remove casts so they become typesafe. (The bulk of this is generated by scripts)
87 lines
3.4 KiB
C
87 lines
3.4 KiB
C
/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software donated to Berkeley by
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* the UCLA Ficus project.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)umap.h 8.4 (Berkeley) 8/20/94
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*
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* $FreeBSD$
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*/
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#define MAPFILEENTRIES 64
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#define GMAPFILEENTRIES 16
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#define NOBODY 32767
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#define NULLGROUP 65534
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struct umap_args {
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char *target; /* Target of loopback */
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int nentries; /* # of entries in user map array */
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int gnentries; /* # of entries in group map array */
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u_long (*mapdata)[2]; /* pointer to array of user mappings */
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u_long (*gmapdata)[2]; /* pointer to array of group mappings */
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};
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struct umap_mount {
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struct mount *umapm_vfs;
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struct vnode *umapm_rootvp; /* Reference to root umap_node */
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int info_nentries; /* number of uid mappings */
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int info_gnentries; /* number of gid mappings */
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u_long info_mapdata[MAPFILEENTRIES][2]; /* mapping data for
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user mapping in ficus */
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u_long info_gmapdata[GMAPFILEENTRIES][2]; /*mapping data for
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group mapping in ficus */
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};
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#ifdef _KERNEL
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/*
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* A cache of vnode references
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*/
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struct umap_node {
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LIST_ENTRY(umap_node) umap_hash; /* Hash list */
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struct vnode *umap_lowervp; /* Aliased vnode - VREFed once */
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struct vnode *umap_vnode; /* Back pointer to vnode/umap_node */
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};
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extern int umapfs_init(struct vfsconf *vfsp);
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extern int umap_node_create(struct mount *mp, struct vnode *target, struct vnode **vpp);
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extern u_long umap_reverse_findid(u_long id, u_long map[][2], int nentries);
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extern void umap_mapids(struct mount *v_mount, struct ucred *credp);
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#define MOUNTTOUMAPMOUNT(mp) ((struct umap_mount *)((mp)->mnt_data))
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#define VTOUMAP(vp) ((struct umap_node *)(vp)->v_data)
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#define UMAPTOV(xp) ((xp)->umap_vnode)
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#ifdef DIAGNOSTIC
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extern struct vnode *umap_checkvp(struct vnode *vp, char *fil, int lno);
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#define UMAPVPTOLOWERVP(vp) umap_checkvp((vp), __FILE__, __LINE__)
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#else
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#define UMAPVPTOLOWERVP(vp) (VTOUMAP(vp)->umap_lowervp)
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#endif
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#endif /* _KERNEL */
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