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procfs.h revision 1.27 
      1 /*	$NetBSD: procfs.h,v 1.27 1999/09/02 23:33:45 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1993 Jan-Simon Pendry
      5  * Copyright (c) 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * Jan-Simon Pendry.
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  * 3. All advertising materials mentioning features or use of this software
     20  *    must display the following acknowledgement:
     21  *	This product includes software developed by the University of
     22  *	California, Berkeley and its contributors.
     23  * 4. Neither the name of the University nor the names of its contributors
     24  *    may be used to endorse or promote products derived from this software
     25  *    without specific prior written permission.
     26  *
     27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     37  * SUCH DAMAGE.
     38  *
     39  *	@(#)procfs.h	8.9 (Berkeley) 5/14/95
     40  */
     41 
     42 /*
     43  * The different types of node in a procfs filesystem
     44  */
     45 typedef enum {
     46 	Proot,		/* the filesystem root */
     47 	Pcurproc,	/* symbolic link for curproc */
     48 	Pself,		/* like curproc, but this is the Linux name */
     49 	Pproc,		/* a process-specific sub-directory */
     50 	Pfile,		/* the executable file */
     51 	Pmem,		/* the process's memory image */
     52 	Pregs,		/* the process's register set */
     53 	Pfpregs,	/* the process's FP register set */
     54 	Pctl,		/* process control */
     55 	Pstatus,	/* process status */
     56 	Pnote,		/* process notifier */
     57 	Pnotepg,	/* process group notifier */
     58 	Pmap,		/* memory map */
     59 	Pcmdline	/* process command line args */
     60 } pfstype;
     61 
     62 /*
     63  * control data for the proc file system.
     64  */
     65 struct pfsnode {
     66 	struct pfsnode	*pfs_next;	/* next on list */
     67 	struct vnode	*pfs_vnode;	/* vnode associated with this pfsnode */
     68 	pfstype		pfs_type;	/* type of procfs node */
     69 	pid_t		pfs_pid;	/* associated process */
     70 	mode_t		pfs_mode;	/* mode bits for stat() */
     71 	u_long		pfs_flags;	/* open flags */
     72 	u_long		pfs_fileno;	/* unique file id */
     73 };
     74 
     75 #define PROCFS_NOTELEN	64	/* max length of a note (/proc/$pid/note) */
     76 #define PROCFS_CTLLEN 	8	/* max length of a ctl msg (/proc/$pid/ctl */
     77 
     78 /*
     79  * Kernel stuff follows
     80  */
     81 #ifdef _KERNEL
     82 #define CNEQ(cnp, s, len) \
     83 	 ((cnp)->cn_namelen == (len) && \
     84 	  (memcmp((s), (cnp)->cn_nameptr, (len)) == 0))
     85 
     86 #define UIO_MX 32
     87 
     88 #define PROCFS_FILENO(pid, type) \
     89 	(((type) < Pproc) ? \
     90 			((type) + 2) : \
     91 			((((pid)+1) << 4) + ((int) (type))))
     92 
     93 /*
     94  * Convert between pfsnode vnode
     95  */
     96 #define VTOPFS(vp)	((struct pfsnode *)(vp)->v_data)
     97 #define PFSTOV(pfs)	((pfs)->pfs_vnode)
     98 
     99 typedef struct vfs_namemap vfs_namemap_t;
    100 struct vfs_namemap {
    101 	const char *nm_name;
    102 	int nm_val;
    103 };
    104 
    105 int vfs_getuserstr __P((struct uio *, char *, int *));
    106 vfs_namemap_t *vfs_findname __P((vfs_namemap_t *, char *, int));
    107 
    108 #define PFIND(pid) ((pid) ? pfind(pid) : &proc0)
    109 int procfs_freevp __P((struct vnode *));
    110 int procfs_allocvp __P((struct mount *, struct vnode **, long, pfstype));
    111 struct vnode *procfs_findtextvp __P((struct proc *));
    112 int procfs_donote __P((struct proc *, struct proc *, struct pfsnode *,
    113     struct uio *));
    114 int procfs_doregs __P((struct proc *, struct proc *, struct pfsnode *,
    115     struct uio *));
    116 int procfs_dofpregs __P((struct proc *, struct proc *, struct pfsnode *,
    117     struct uio *));
    118 int procfs_domem __P((struct proc *, struct proc *, struct pfsnode *,
    119     struct uio *));
    120 int procfs_doctl __P((struct proc *, struct proc *, struct pfsnode *,
    121     struct uio *));
    122 int procfs_dostatus __P((struct proc *, struct proc *, struct pfsnode *,
    123     struct uio *));
    124 int procfs_domap __P((struct proc *, struct proc *, struct pfsnode *,
    125     struct uio *));
    126 int procfs_docmdline __P((struct proc *, struct proc *, struct pfsnode *,
    127     struct uio *));
    128 
    129 int procfs_checkioperm __P((struct proc *, struct proc *));
    130 
    131 /* functions to check whether or not files should be displayed */
    132 int procfs_validfile __P((struct proc *));
    133 int procfs_validfpregs __P((struct proc *));
    134 int procfs_validregs __P((struct proc *));
    135 int procfs_validmap __P((struct proc *));
    136 
    137 int procfs_rw __P((void *));
    138 
    139 #define PROCFS_LOCKED	0x01
    140 #define PROCFS_WANT	0x02
    141 
    142 extern int (**procfs_vnodeop_p) __P((void *));
    143 extern struct vfsops procfs_vfsops;
    144 
    145 int	procfs_root __P((struct mount *, struct vnode **));
    146 
    147 #endif /* _KERNEL */
    148