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kernfs.h revision 1.4 
      1 /*
      2  * Copyright (c) 1990, 1992 Jan-Simon Pendry
      3  * All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * Jan-Simon Pendry.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *      This product includes software developed by the University of
     19  *      California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	$Id: kernfs.h,v 1.4 1993/05/28 16:47:02 cgd Exp $
     37  */
     38 
     39 #ifdef KERNEL
     40 struct kernfs_mount {
     41 	struct vnode	*kf_root;	/* Root node */
     42 };
     43 
     44 struct kernfs_node {
     45 	struct kernfs_target *kf_kt;
     46 };
     47 
     48 #define KSTRING 256		/* Largest I/O available via this filesystem */
     49 #define UIO_MX 32
     50 
     51 struct kernfs_target {
     52 	char *kt_name;
     53 	void *kt_data;
     54 #define KTT_NULL 1
     55 #define KTT_TIME 5
     56 #define KTT_INT 17
     57 #define KTT_STRING 31
     58 #define KTT_HOSTNAME 47
     59 #define KTT_AVENRUN 53
     60 	int kt_tag;
     61 #define KTM_RO_PERMS		(S_IRUSR|S_IRGRP|S_IROTH)
     62 #define KTM_RW_PERMS		(S_IWUSR|S_IRUSR|S_IRGRP|S_IWGRP| \
     63 				 S_IROTH|S_IWOTH)
     64 #define KTM_DIR_PERMS		(S_IRUSR|S_IXUSR|S_IRGRP|S_IXGRP| \
     65 				 S_IROTH|S_IXOTH)
     66 #define KTM_MASK_PERMS		(~(S_IWGRP|S_IWOTH))
     67 	u_short kt_maxperms;
     68 	int	kt_vtype;
     69 	u_short kt_perms;
     70 	uid_t	kt_uid;
     71 	gid_t	kt_gid;
     72 };
     73 
     74 #define DIR_TARGET(name, data, tag, perms) \
     75 { name,	data,	tag,	/*max*/perms,	VDIR,	perms & KTM_MASK_PERMS,	0, 0 },
     76 #define REG_TARGET(name, data, tag, perms) \
     77 { name,	data,	tag,	/*max*/perms,	VREG,	perms & KTM_MASK_PERMS,	0, 0 },
     78 #define BLK_TARGET(name, data, tag, perms) \
     79 { name,	data,	tag,	/*max*/perms,	VBLK,	perms & KTM_MASK_PERMS,	0, 0 },
     80 #define CHR_TARGET(name, data, tag, perms) \
     81 { name,	data,	tag,	/*max*/perms,	VCHR,	perms & KTM_MASK_PERMS,	0, 0 },
     82 
     83 
     84 #define VFSTOKERNFS(mp)	((struct kernfs_mount *)((mp)->mnt_data))
     85 #define	VTOKERN(vp) ((struct kernfs_node *)(vp)->v_data)
     86 
     87 extern struct vnodeops kernfs_vnodeops;
     88 extern struct vfsops kernfs_vfsops;
     89 
     90 extern struct vnode *rrootdevvp;
     91 
     92 struct kernfs_target kernfs_targets[];
     93 #define KERNFS_TARGET_ROOT	0
     94 
     95 #endif /* KERNEL */
     96