1 /* $NetBSD: procfs.h,v 1.20 1997/08/27 08:52:51 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 8.7 (Berkeley) 6/15/94 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 Pproc, /* a process-specific sub-directory */ 49 Pfile, /* the executable file */ 50 Pmem, /* the process's memory image */ 51 Pregs, /* the process's register set */ 52 Pfpregs, /* the process's FP register set */ 53 Pctl, /* process control */ 54 Pstatus, /* process status */ 55 Pnote, /* process notifier */ 56 Pnotepg /* process group notifier */ 57 } pfstype; 58 59 /* 60 * control data for the proc file system. 61 */ 62 struct pfsnode { 63 struct pfsnode *pfs_next; /* next on list */ 64 struct vnode *pfs_vnode; /* vnode associated with this pfsnode */ 65 pfstype pfs_type; /* type of procfs node */ 66 pid_t pfs_pid; /* associated process */ 67 mode_t pfs_mode; /* mode bits for stat() */ 68 u_long pfs_flags; /* open flags */ 69 u_long pfs_fileno; /* unique file id */ 70 }; 71 72 #define PROCFS_NOTELEN 64 /* max length of a note (/proc/$pid/note) */ 73 #define PROCFS_CTLLEN 8 /* max length of a ctl msg (/proc/$pid/ctl */ 74 75 /* 76 * Kernel stuff follows 77 */ 78 #ifdef _KERNEL 79 #define CNEQ(cnp, s, len) \ 80 ((cnp)->cn_namelen == (len) && \ 81 (bcmp((s), (cnp)->cn_nameptr, (len)) == 0)) 82 83 #define UIO_MX 32 84 85 #define PROCFS_FILENO(pid, type) \ 86 (((type) < Pproc) ? \ 87 ((type) + 2) : \ 88 ((((pid)+1) << 4) + ((int) (type)))) 89 90 /* 91 * Convert between pfsnode vnode 92 */ 93 #define VTOPFS(vp) ((struct pfsnode *)(vp)->v_data) 94 #define PFSTOV(pfs) ((pfs)->pfs_vnode) 95 96 typedef struct vfs_namemap vfs_namemap_t; 97 struct vfs_namemap { 98 const char *nm_name; 99 int nm_val; 100 }; 101 102 int vfs_getuserstr __P((struct uio *, char *, int *)); 103 vfs_namemap_t *vfs_findname __P((vfs_namemap_t *, char *, int)); 104 105 #define PFIND(pid) ((pid) ? pfind(pid) : &proc0) 106 int procfs_freevp __P((struct vnode *)); 107 int procfs_allocvp __P((struct mount *, struct vnode **, long, pfstype)); 108 struct vnode *procfs_findtextvp __P((struct proc *)); 109 int procfs_donote __P((struct proc *, struct proc *, struct pfsnode *pfsp, struct uio *uio)); 110 int procfs_doregs __P((struct proc *, struct proc *, struct pfsnode *pfsp, struct uio *uio)); 111 int procfs_dofpregs __P((struct proc *, struct proc *, struct pfsnode *pfsp, struct uio *uio)); 112 int procfs_domem __P((struct proc *, struct proc *, struct pfsnode *pfsp, struct uio *uio)); 113 int procfs_doctl __P((struct proc *, struct proc *, struct pfsnode *pfsp, struct uio *uio)); 114 int procfs_dostatus __P((struct proc *, struct proc *, struct pfsnode *pfsp, struct uio *uio)); 115 116 int procfs_checkioperm __P((struct proc *p, struct proc *t)); 117 118 /* functions to check whether or not files should be displayed */ 119 int procfs_validfile __P((struct proc *)); 120 int procfs_validfpregs __P((struct proc *)); 121 int procfs_validregs __P((struct proc *)); 122 123 int procfs_rw __P((void *)); 124 125 #define PROCFS_LOCKED 0x01 126 #define PROCFS_WANT 0x02 127 128 extern int (**procfs_vnodeop_p) __P((void *)); 129 extern struct vfsops procfs_vfsops; 130 131 void procfs_init __P((void)); 132 int procfs_root __P((struct mount *, struct vnode **)); 133 134 #endif /* _KERNEL */ 135