ff5cdfae2d
<sys/proc.h> to <sys/systm.h>. Correctly document the #includes needed in the manpage. Add one now needed #include of <sys/systm.h>. Remove the consequent 48 unused #includes of <sys/proc.h>.
525 lines
18 KiB
C
525 lines
18 KiB
C
/*-
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* Copyright (c) 1986, 1989, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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* @(#)proc.h 8.15 (Berkeley) 5/19/95
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* $FreeBSD$
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*/
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#ifndef _SYS_PROC_H_
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#define _SYS_PROC_H_
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#include <machine/proc.h> /* Machine-dependent proc substruct. */
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#include <sys/callout.h> /* For struct callout_handle. */
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#include <sys/filedesc.h>
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#include <sys/queue.h>
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#include <sys/rtprio.h> /* For struct rtprio. */
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#include <sys/signal.h>
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#ifndef _KERNEL
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#include <sys/time.h> /* For structs itimerval, timeval. */
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#endif
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#include <sys/ucred.h>
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#include <sys/event.h> /* For struct klist */
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/*
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* One structure allocated per session.
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*/
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struct session {
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int s_count; /* Ref cnt; pgrps in session. */
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struct proc *s_leader; /* Session leader. */
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struct vnode *s_ttyvp; /* Vnode of controlling terminal. */
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struct tty *s_ttyp; /* Controlling terminal. */
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pid_t s_sid; /* Session ID */
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char s_login[roundup(MAXLOGNAME, sizeof(long))]; /* Setlogin() name. */
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};
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/*
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* One structure allocated per process group.
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*/
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struct pgrp {
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LIST_ENTRY(pgrp) pg_hash; /* Hash chain. */
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LIST_HEAD(, proc) pg_members; /* Pointer to pgrp members. */
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struct session *pg_session; /* Pointer to session. */
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struct sigiolst pg_sigiolst; /* List of sigio sources. */
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pid_t pg_id; /* Pgrp id. */
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int pg_jobc; /* # procs qualifying pgrp for job control */
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};
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struct procsig {
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sigset_t ps_sigignore; /* Signals being ignored. */
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sigset_t ps_sigcatch; /* Signals being caught by user. */
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int ps_flag;
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struct sigacts *ps_sigacts;
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int ps_refcnt;
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};
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#define PS_NOCLDWAIT 0x0001 /* No zombies if child dies */
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#define PS_NOCLDSTOP 0x0002 /* No SIGCHLD when children stop. */
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/*
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* pasleep structure, used by asleep() syscall to hold requested priority
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* and timeout values for await().
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*/
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struct pasleep {
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int as_priority; /* Async priority. */
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int as_timo; /* Async timeout. */
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};
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/*
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* pargs, used to hold a copy of the command line, if it had a sane
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* length
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*/
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struct pargs {
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u_int ar_ref; /* Reference count */
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u_int ar_length; /* Length */
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u_char ar_args[0]; /* Arguments */
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};
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/*
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* Description of a process.
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*
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* This structure contains the information needed to manage a thread of
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* control, known in UN*X as a process; it has references to substructures
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* containing descriptions of things that the process uses, but may share
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* with related processes. The process structure and the substructures
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* are always addressable except for those marked "(PROC ONLY)" below,
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* which might be addressable only on a processor on which the process
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* is running.
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*/
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struct jail;
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struct mtx;
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struct ithd;
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struct proc {
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TAILQ_ENTRY(proc) p_procq; /* run/sleep queue. */
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LIST_ENTRY(proc) p_list; /* List of all processes. */
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/* substructures: */
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struct pcred *p_cred; /* Process owner's identity. */
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struct filedesc *p_fd; /* Ptr to open files structure. */
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struct pstats *p_stats; /* Accounting/statistics (PROC ONLY). */
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struct plimit *p_limit; /* Process limits. */
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struct vm_object *p_upages_obj;/* Upages object */
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struct procsig *p_procsig;
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#define p_sigacts p_procsig->ps_sigacts
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#define p_sigignore p_procsig->ps_sigignore
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#define p_sigcatch p_procsig->ps_sigcatch
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#define p_ucred p_cred->pc_ucred
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#define p_rlimit p_limit->pl_rlimit
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int p_flag; /* P_* flags. */
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char p_stat; /* S* process status. */
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char p_pad1[3];
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pid_t p_pid; /* Process identifier. */
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LIST_ENTRY(proc) p_hash; /* Hash chain. */
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LIST_ENTRY(proc) p_pglist; /* List of processes in pgrp. */
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struct proc *p_pptr; /* Pointer to parent process. */
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LIST_ENTRY(proc) p_sibling; /* List of sibling processes. */
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LIST_HEAD(, proc) p_children; /* Pointer to list of children. */
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struct callout_handle p_ithandle; /*
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* Callout handle for scheduling
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* p_realtimer.
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*/
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/* The following fields are all zeroed upon creation in fork. */
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#define p_startzero p_oppid
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pid_t p_oppid; /* Save parent pid during ptrace. XXX */
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int p_dupfd; /* Sideways return value from fdopen. XXX */
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struct vmspace *p_vmspace; /* Address space. */
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/* scheduling */
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u_int p_estcpu; /* Time averaged value of p_cpticks. */
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int p_cpticks; /* Ticks of cpu time. */
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fixpt_t p_pctcpu; /* %cpu for this process during p_swtime */
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void *p_wchan; /* Sleep address. */
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const char *p_wmesg; /* Reason for sleep. */
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u_int p_swtime; /* Time swapped in or out. */
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u_int p_slptime; /* Time since last blocked. */
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struct itimerval p_realtimer; /* Alarm timer. */
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u_int64_t p_runtime; /* Real time in microsec. */
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u_int64_t p_uu; /* Previous user time in microsec. */
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u_int64_t p_su; /* Previous system time in microsec. */
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u_int64_t p_iu; /* Previous interrupt time in usec. */
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u_int64_t p_uticks; /* Statclock hits in user mode. */
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u_int64_t p_sticks; /* Statclock hits in system mode. */
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u_int64_t p_iticks; /* Statclock hits processing intr. */
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int p_traceflag; /* Kernel trace points. */
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struct vnode *p_tracep; /* Trace to vnode. */
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sigset_t p_siglist; /* Signals arrived but not delivered. */
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struct vnode *p_textvp; /* Vnode of executable. */
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char p_lock; /* Process lock (prevent swap) count. */
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u_char p_oncpu; /* Which cpu we are on */
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u_char p_lastcpu; /* Last cpu we were on */
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char p_rqindex; /* Run queue index */
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short p_locks; /* DEBUG: lockmgr count of held locks */
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short p_simple_locks; /* DEBUG: count of held simple locks */
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unsigned int p_stops; /* procfs event bitmask */
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unsigned int p_stype; /* procfs stop event type */
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char p_step; /* procfs stop *once* flag */
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unsigned char p_pfsflags; /* procfs flags */
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char p_pad3[2]; /* padding for alignment */
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register_t p_retval[2]; /* syscall aux returns */
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struct sigiolst p_sigiolst; /* list of sigio sources */
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int p_sigparent; /* signal to parent on exit */
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sigset_t p_oldsigmask; /* saved mask from before sigpause */
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int p_sig; /* for core dump/debugger XXX */
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u_long p_code; /* for core dump/debugger XXX */
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struct klist p_klist; /* knotes attached to this process */
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LIST_HEAD(, mtx) p_heldmtx; /* for debugging code */
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struct mtx *p_blocked; /* Mutex process is blocked on */
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LIST_HEAD(, mtx) p_contested; /* contested locks */
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/* End area that is zeroed on creation. */
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#define p_endzero p_startcopy
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/* The following fields are all copied upon creation in fork. */
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#define p_startcopy p_sigmask
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sigset_t p_sigmask; /* Current signal mask. */
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stack_t p_sigstk; /* sp & on stack state variable */
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int p_magic; /* Magic number. */
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u_char p_priority; /* Process priority. */
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u_char p_usrpri; /* User-priority based on p_cpu and p_nice. */
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u_char p_nativepri; /* Priority before propogation. */
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char p_nice; /* Process "nice" value. */
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char p_comm[MAXCOMLEN+1];
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struct pgrp *p_pgrp; /* Pointer to process group. */
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struct sysentvec *p_sysent; /* System call dispatch information. */
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struct rtprio p_rtprio; /* Realtime priority. */
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struct prison *p_prison;
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struct pargs *p_args;
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/* End area that is copied on creation. */
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#define p_endcopy p_addr
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struct user *p_addr; /* Kernel virtual addr of u-area (PROC ONLY). */
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struct mdproc p_md; /* Any machine-dependent fields. */
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u_short p_xstat; /* Exit status for wait; also stop signal. */
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u_short p_acflag; /* Accounting flags. */
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struct rusage *p_ru; /* Exit information. XXX */
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int p_nthreads; /* number of threads (only in leader) */
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void *p_aioinfo; /* ASYNC I/O info */
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int p_wakeup; /* thread id */
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struct proc *p_peers;
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struct proc *p_leader;
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struct pasleep p_asleep; /* Used by asleep()/await(). */
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void *p_emuldata; /* process-specific emulator state data */
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struct ithd *p_ithd; /* for interrupt threads only */
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};
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#define p_session p_pgrp->pg_session
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#define p_pgid p_pgrp->pg_id
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/* Status values (p_stat) */
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#define SIDL 1 /* Process being created by fork. */
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#define SRUN 2 /* Currently runnable. */
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#define SSLEEP 3 /* Sleeping on an address. */
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#define SSTOP 4 /* Process debugging or suspension. */
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#define SZOMB 5 /* Awaiting collection by parent. */
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#define SWAIT 6 /* Waiting for interrupt. */
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#define SMTX 7 /* Blocked on a mutex. */
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/* These flags are kept in p_flags. */
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#define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
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#define P_CONTROLT 0x00002 /* Has a controlling terminal. */
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#define P_INMEM 0x00004 /* Loaded into memory. */
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#define P_NOLOAD 0x00008 /* Ignore during load avg calculations. */
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#define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
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#define P_PROFIL 0x00020 /* Has started profiling. */
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#define P_SELECT 0x00040 /* Selecting; wakeup/waiting danger. */
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#define P_SINTR 0x00080 /* Sleep is interruptible. */
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#define P_SUGID 0x00100 /* Had set id privileges since last exec. */
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#define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
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#define P_TIMEOUT 0x00400 /* Timing out during sleep. */
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#define P_TRACED 0x00800 /* Debugged process being traced. */
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#define P_WAITED 0x01000 /* Debugging process has waited for child. */
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#define P_WEXIT 0x02000 /* Working on exiting. */
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#define P_EXEC 0x04000 /* Process called exec. */
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#define P_ALRMPEND 0x08000 /* Pending SIGVTALRM needs to be posted. */
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#define P_PROFPEND 0x10000 /* Pending SIGPROF needs to be posted. */
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/* Should probably be changed into a hold count. */
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/* was P_NOSWAP 0x08000 was: Do not swap upages; p->p_hold */
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/* was P_PHYSIO 0x10000 was: Doing physical I/O; use p->p_hold */
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/* Should be moved to machine-dependent areas. */
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#define P_OWEUPC 0x20000 /* Owe process an addupc() call at next ast. */
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#define P_SWAPPING 0x40000 /* Process is being swapped. */
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#define P_SWAPINREQ 0x80000 /* Swapin request due to wakeup */
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/* Marked a kernel thread */
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#define P_BUFEXHAUST 0x100000 /* dirty buffers flush is in progress */
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#define P_KTHREADP 0x200000 /* Process is really a kernel thread */
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#define P_COWINPROGRESS 0x400000 /* Snapshot copy-on-write in progress */
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#define P_DEADLKTREAT 0x800000 /* lock aquisition - deadlock treatment */
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#define P_JAILED 0x1000000 /* Process is in jail */
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#define P_OLDMASK 0x2000000 /* need to restore mask before pause */
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#define P_ALTSTACK 0x4000000 /* have alternate signal stack */
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#define P_MAGIC 0xbeefface
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#define P_CAN_SEE 1
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#define P_CAN_KILL 2
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#define P_CAN_SCHED 3
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#define P_CAN_DEBUG 4
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/*
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* MOVE TO ucred.h?
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*
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* Shareable process credentials (always resident). This includes a reference
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* to the current user credentials as well as real and saved ids that may be
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* used to change ids.
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*/
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struct pcred {
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struct ucred *pc_ucred; /* Current credentials. */
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uid_t p_ruid; /* Real user id. */
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uid_t p_svuid; /* Saved effective user id. */
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gid_t p_rgid; /* Real group id. */
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gid_t p_svgid; /* Saved effective group id. */
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int p_refcnt; /* Number of references. */
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struct uidinfo *p_uidinfo; /* Per uid resource consumption */
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};
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/*
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* Describe an interrupt thread. There is one of these per irq. BSD/OS makes
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* this a superset of struct proc, i.e. it_proc is the struct itself and not a
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* pointer. We point in both directions, because it feels good that way.
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*/
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struct ithd {
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struct proc *it_proc; /* interrupt process */
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LIST_HEAD(ihhead, intrhand) it_ihhead;
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LIST_HEAD(srchead, isrc) it_isrchead;
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/* Fields used by all interrupt threads */
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LIST_ENTRY(ithd) it_list; /* All interrupt threads */
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int it_need; /* Needs service */
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int irq; /* irq */
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struct intrhand *it_ih; /* head of handler queue */
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struct ithd *it_interrupted; /* Who we interrupted */
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/* Fields used only for hard interrupt threads */
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int it_stray; /* Stray interrupts */
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#ifdef APIC_IO
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/* Used by APIC interrupt sources */
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int it_needeoi; /* An EOI is needed */
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int it_blocked; /* at least 1 blocked apic src */
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#endif
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/* stats */
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#ifdef SMP_DEBUG
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int it_busy; /* failed attempts on runlock */
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int it_lostneeded; /* Number of it_need races lost */
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int it_invprio; /* Startup priority inversions */
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#endif
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#ifdef NEEDED
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/*
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* These are in the BSD/OS i386 sources only, not in SPARC.
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* I'm not yet sure we need them.
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*/
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LIST_HEAD(ihhead, intrhand) it_ihhead;
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LIST_HEAD(srchead, isrc) it_isrchead;
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/* Fields used by all interrupt threads */
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LIST_ENTRY(ithd) it_list; /* All interrupt threads */
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/* Fields user only for soft interrupt threads */
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sifunc_t it_service; /* service routine */
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int it_cnt; /* number of schedule events */
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#endif
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void *it_md; /* hook for MD interrupt code */
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};
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#ifdef _KERNEL
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#ifdef MALLOC_DECLARE
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MALLOC_DECLARE(M_SESSION);
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MALLOC_DECLARE(M_SUBPROC);
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MALLOC_DECLARE(M_ZOMBIE);
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MALLOC_DECLARE(M_PARGS);
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#endif
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/* Handy macro to determine of p1 can mangle p2 */
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#define PRISON_CHECK(p1, p2) \
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((!(p1)->p_prison) || (p1)->p_prison == (p2)->p_prison)
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/*
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* We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
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* as it is used to represent "no process group".
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*/
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#define PID_MAX 99999
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#define NO_PID 100000
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#define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
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#define SESSHOLD(s) ((s)->s_count++)
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#define SESSRELE(s) { \
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if (--(s)->s_count == 0) \
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FREE(s, M_SESSION); \
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}
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/*
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* STOPEVENT is MP SAFE.
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*/
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extern void stopevent(struct proc*, unsigned int, unsigned int);
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#define STOPEVENT(p,e,v) \
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do { \
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if ((p)->p_stops & (e)) { \
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mtx_enter(&Giant, MTX_DEF); \
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stopevent(p,e,v); \
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mtx_exit(&Giant, MTX_DEF); \
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} \
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} while (0)
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/* hold process U-area in memory, normally for ptrace/procfs work */
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#define PHOLD(p) { \
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if ((p)->p_lock++ == 0 && ((p)->p_flag & P_INMEM) == 0) \
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faultin(p); \
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}
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#define PRELE(p) (--(p)->p_lock)
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#define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
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extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
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extern u_long pidhash;
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#define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
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extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
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extern u_long pgrphash;
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extern struct proc proc0; /* Process slot for swapper. */
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extern int hogticks; /* Limit on kernel cpu hogs. */
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extern int nprocs, maxproc; /* Current and max number of procs. */
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extern int maxprocperuid; /* Max procs per uid. */
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extern int sched_quantum; /* Scheduling quantum in ticks */
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LIST_HEAD(proclist, proc);
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extern struct proclist allproc; /* List of all processes. */
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extern struct proclist zombproc; /* List of zombie processes. */
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extern struct proc *initproc, *pageproc, *updateproc; /* Process slots for init, pager. */
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#define NQS 32 /* 32 run queues. */
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TAILQ_HEAD(rq, proc);
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extern struct rq itqueues[];
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extern struct rq rtqueues[];
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extern struct rq queues[];
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extern struct rq idqueues[];
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/*
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* XXX macros for scheduler. Shouldn't be here, but currently needed for
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* bounding the dubious p_estcpu inheritance in wait1().
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* INVERSE_ESTCPU_WEIGHT is only suitable for statclock() frequencies in
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* the range 100-256 Hz (approximately).
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*/
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#define INVERSE_ESTCPU_WEIGHT 8 /* 1 / (priorities per estcpu level) */
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#define NICE_WEIGHT 1 /* priorities per nice level */
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#define PPQ (128 / NQS) /* priorities per queue */
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#define ESTCPULIM(e) \
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min((e), INVERSE_ESTCPU_WEIGHT * (NICE_WEIGHT * PRIO_TOTAL - PPQ) + \
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INVERSE_ESTCPU_WEIGHT - 1)
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extern u_long ps_arg_cache_limit;
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extern int ps_argsopen;
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extern int ps_showallprocs;
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struct proc *pfind __P((pid_t)); /* Find process by id. */
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struct pgrp *pgfind __P((pid_t)); /* Find process group by id. */
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struct vm_zone;
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extern struct vm_zone *proc_zone;
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int enterpgrp __P((struct proc *p, pid_t pgid, int mksess));
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void fixjobc __P((struct proc *p, struct pgrp *pgrp, int entering));
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int inferior __P((struct proc *p));
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int leavepgrp __P((struct proc *p));
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void mi_switch __P((void));
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int p_can __P((const struct proc *p1, const struct proc *p2, int operation,
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int *privused));
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void proc_reparent __P((struct proc *child, struct proc *newparent));
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void procinit __P((void));
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void resetpriority __P((struct proc *));
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int roundrobin_interval __P((void));
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void schedclock __P((struct proc *));
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void setrunnable __P((struct proc *));
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void setrunqueue __P((struct proc *));
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void sleepinit __P((void));
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void remrunqueue __P((struct proc *));
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void cpu_switch __P((void));
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void cpu_throw __P((void)) __dead2;
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void cpu_idle __P((void));
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void unsleep __P((struct proc *));
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void cpu_exit __P((struct proc *)) __dead2;
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void exit1 __P((struct proc *, int)) __dead2;
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void cpu_fork __P((struct proc *, struct proc *, int));
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void cpu_set_fork_handler __P((struct proc *, void (*)(void *), void *));
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int fork1 __P((struct proc *, int, struct proc **));
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int trace_req __P((struct proc *));
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void cpu_wait __P((struct proc *));
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int cpu_coredump __P((struct proc *, struct vnode *, struct ucred *));
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void setsugid __P((struct proc *p));
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void faultin __P((struct proc *p));
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struct proc * chooseproc __P((void));
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u_int32_t procrunnable __P((void));
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#endif /* _KERNEL */
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#endif /* !_SYS_PROC_H_ */
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