[unix-history] / usr / src / sys / sys / proc.h

/*
 * Copyright (c) 1982, 1986 Regents of the University of California.
 * All rights reserved.  The Berkeley software License Agreement
 * specifies the terms and conditions for redistribution.
 *
 *	@(#)proc.h	7.3 (Berkeley) %G%
 */

/*
 * One structure allocated per session.
 */
struct	session {
	struct	proc *s_leader;	/* pointer to session leader */
	short	s_count;	/* number of pgrps in session */
};

/*
 * One structure allocated per process group.
 */
struct	pgrp {
	struct	pgrp *pg_hforw;	/* forward link in hash bucket */
	struct	proc *pg_mem;	/* pointer to pgrp members */
	struct	session *pg_session;	/* pointer to session */
	pid_t	pg_id;		/* pgrp id */
	short	pg_jobc;	/* # procs qualifying pgrp for job control */
};

/*
 * One structure allocated per active
 * process. It contains all data needed
 * about the process while the
 * process may be swapped out.
 * Other per process data (user.h)
 * is swapped with the process.
 */
struct	proc {
	struct	proc *p_link;	/* linked list of running processes */
	struct	proc *p_rlink;
	struct	proc *p_nxt;	/* linked list of allocated proc slots */
	struct	proc **p_prev;		/* also zombies, and free proc's */
	struct	pte *p_addr;	/* u-area kernel map address */
	char	p_usrpri;	/* user-priority based on p_cpu and p_nice */
	char	p_pri;		/* priority, negative is high */
	char	p_cpu;		/* cpu usage for scheduling */
	char	p_stat;
	char	p_time;		/* resident time for scheduling */
	char	p_nice;		/* nice for cpu usage */
	char	p_slptime;	/* time since last block */
	char	p_cursig;
	int	p_sig;		/* signals pending to this process */
	int	p_sigmask;	/* current signal mask */
	int	p_sigignore;	/* signals being ignored */
	int	p_sigcatch;	/* signals being caught by user */
	int	p_flag;
	uid_t	p_uid;		/* user id, used to direct tty signals */
	pid_t	p_pid;		/* unique process id */
	pid_t	p_ppid;		/* process id of parent */
	u_short	p_xstat;	/* Exit status for wait */
	struct	rusage *p_ru;	/* mbuf holding exit information */
	short	p_poip;		/* page outs in progress */
	short	p_szpt;		/* copy of page table size */
	size_t	p_tsize;	/* size of text (clicks) */
	size_t	p_dsize;	/* size of data space (clicks) */
	size_t	p_ssize;	/* copy of stack size (clicks) */
	size_t 	p_rssize; 	/* current resident set size in clicks */
	size_t	p_maxrss;	/* copy of u.u_limit[MAXRSS] */
	size_t	p_swrss;	/* resident set size before last swap */
	swblk_t	p_swaddr;	/* disk address of u area when swapped */
	caddr_t p_wchan;	/* event process is awaiting */
	struct	text *p_textp;	/* pointer to text structure */
	struct	pte *p_p0br;	/* page table base P0BR */
	struct	proc *p_xlink;	/* linked list of procs sharing same text */
	short	p_cpticks;	/* ticks of cpu time */
	float	p_pctcpu;	/* %cpu for this process during p_time */
	short	p_ndx;		/* proc index for memall (because of vfork) */
	short	p_idhash;	/* hashed based on p_pid for kill+exit+... */
	struct	proc *p_pptr;	/* pointer to process structure of parent */
	struct	proc *p_cptr;	/* pointer to youngest living child */
	struct	proc *p_osptr;	/* pointer to older sibling processes */
	struct	proc *p_ysptr;	/* pointer to younger siblings */
	struct 	pgrp *p_pgrp;	/* pointer to process group */
#define p_session p_pgrp->pg_session
#define p_pgid	p_pgrp->pg_id
	struct	proc *p_pgrpnxt; /* pointer to next process in process group */
	struct	itimerval p_realtimer;
	struct	quota *p_quota;	/* quotas for this process */
#if defined(tahoe)
	int	p_ckey;		/* code cache key */
	int	p_dkey;		/* data cache key */
#endif
};

#define	PIDHSZ		64
#define	PIDHASH(pid)	((pid) & (PIDHSZ - 1))

#ifdef KERNEL
pid_t	pidhash[PIDHSZ];
struct	proc *pfind();
struct	pgrp *pgrphash[PIDHSZ];
struct 	pgrp *pgfind();		/* find process group by id */
struct	proc *proc, *procNPROC;	/* the proc table itself */
struct	proc *freeproc, *zombproc, *allproc;
			/* lists of procs in various states */
int	nproc;

#define	NQS	32		/* 32 run queues */
struct	prochd {
	struct	proc *ph_link;	/* linked list of running processes */
	struct	proc *ph_rlink;
} qs[NQS];
int	whichqs;		/* bit mask summarizing non-empty qs's */

#define SESS_LEADER(p)	((p)->p_session->s_leader == (p))
#define PGRP_JOBC(p)	(((p)->p_pgrp != (p)->p_pptr->p_pgrp) && \
			((p)->p_session == (p)->p_pptr->p_session))
#endif

/* stat codes */
#define	SSLEEP	1		/* awaiting an event */
#define	SWAIT	2		/* (abandoned state) */
#define	SRUN	3		/* running */
#define	SIDL	4		/* intermediate state in process creation */
#define	SZOMB	5		/* intermediate state in process termination */
#define	SSTOP	6		/* process being traced */

/* flag codes */
#define	SLOAD	0x0000001	/* in core */
#define	SSYS	0x0000002	/* swapper or pager process */
#define	SLOCK	0x0000004	/* process being swapped out */
#define	SSWAP	0x0000008	/* save area flag */
#define	STRC	0x0000010	/* process is being traced */
#define	SWTED	0x0000020	/* another tracing flag */
#define	SULOCK	0x0000040	/* user settable lock in core */
#define	SPAGE	0x0000080	/* process in page wait state */
#define	SKEEP	0x0000100	/* another flag to prevent swap out */
#define	SOMASK	0x0000200	/* restore old mask after taking signal */
#define	SWEXIT	0x0000400	/* working on exiting */
#define	SPHYSIO	0x0000800	/* doing physical i/o (bio.c) */
#define	SVFORK	0x0001000	/* process resulted from vfork() */
#define	SVFDONE	0x0002000	/* another vfork flag */
#define	SNOVM	0x0004000	/* no vm, parent in a vfork() */
#define	SPAGI	0x0008000	/* init data space on demand, from inode */
#define	SSEQL	0x0010000	/* user warned of sequential vm behavior */
#define	SUANOM	0x0020000	/* user warned of random vm behavior */
#define	STIMO	0x0040000	/* timing out during sleep */
/* was SDETACH */
#define	SOUSIG	0x0100000	/* using old signal mechanism */
#define	SOWEUPC	0x0200000	/* owe process an addupc() call at next ast */
#define	SSEL	0x0400000	/* selecting; wakeup/waiting danger */
#define	SLOGIN	0x0800000	/* a login process (legit child of init) */
#define	SPTECHG	0x1000000	/* pte's for process have changed */
#define STRCSYS	0x2000000	/* tracing system calls */
#define STRCSYSI 0x4000000	/* tracing system calls - inherited */
#define SEXEC	0x8000000	/* process called exec */
Commit	Line	Data
da7c5cc6	1	/*
1810611d	2	* Copyright (c) 1982, 1986 Regents of the University of California.
da7c5cc6 KM	3	* All rights reserved. The Berkeley software License Agreement
	4	* specifies the terms and conditions for redistribution.
	5	*
0cc0777f	6	* @(#)proc.h 7.3 (Berkeley) %G%
da7c5cc6	7	*/
5cb51551	8
0cc0777f MT	9	/*
	10	* One structure allocated per session.
	11	*/
	12	struct session {
	13	struct proc s_leader; / pointer to session leader */
	14	short s_count; /* number of pgrps in session */
	15	};
	16
	17	/*
	18	* One structure allocated per process group.
	19	*/
	20	struct pgrp {
	21	struct pgrp pg_hforw; / forward link in hash bucket */
	22	struct proc pg_mem; / pointer to pgrp members */
	23	struct session pg_session; / pointer to session */
	24	pid_t pg_id; /* pgrp id */
	25	short pg_jobc; /* # procs qualifying pgrp for job control */
	26	};
	27
5cb51551 BJ	28	/*
	29	* One structure allocated per active
	30	* process. It contains all data needed
	31	* about the process while the
	32	* process may be swapped out.
	33	* Other per process data (user.h)
	34	* is swapped with the process.
5cb51551	35	*/
f9094bc4	36	struct proc {
5cb51551 BJ	37	struct proc p_link; / linked list of running processes */
5cb51551 BJ	38	struct proc *p_rlink;
40e2c1d3 SL	39	struct proc p_nxt; / linked list of allocated proc slots */
40e2c1d3 SL	40	struct proc *p_prev; / also zombies, and free proc's */
5cb51551 BJ	41	struct pte p_addr; / u-area kernel map address */
	42	char p_usrpri; /* user-priority based on p_cpu and p_nice */
	43	char p_pri; /* priority, negative is high */
	44	char p_cpu; /* cpu usage for scheduling */
	45	char p_stat;
	46	char p_time; /* resident time for scheduling */
	47	char p_nice; /* nice for cpu usage */
	48	char p_slptime; /* time since last block */
36c28aee	49	char p_cursig;
40dc6933 SL	50	int p_sig; /* signals pending to this process */
	51	int p_sigmask; /* current signal mask */
	52	int p_sigignore; /* signals being ignored */
	53	int p_sigcatch; /* signals being caught by user */
36c28aee	54	int p_flag;
adc65074	55	uid_t p_uid; /* user id, used to direct tty signals */
0cc0777f MT	56	pid_t p_pid; /* unique process id */
0cc0777f MT	57	pid_t p_ppid; /* process id of parent */
ae89c651	58	u_short p_xstat; /* Exit status for wait */
f9094bc4	59	struct rusage p_ru; / mbuf holding exit information */
aa2930e9 SL	60	short p_poip; /* page outs in progress */
aa2930e9 SL	61	short p_szpt; /* copy of page table size */
5cb51551 BJ	62	size_t p_tsize; /* size of text (clicks) */
	63	size_t p_dsize; /* size of data space (clicks) */
	64	size_t p_ssize; /* copy of stack size (clicks) */
	65	size_t p_rssize; /* current resident set size in clicks */
7196a349	66	size_t p_maxrss; /* copy of u.u_limit[MAXRSS] */
5cb51551 BJ	67	size_t p_swrss; /* resident set size before last swap */
	68	swblk_t p_swaddr; /* disk address of u area when swapped */
	69	caddr_t p_wchan; /* event process is awaiting */
	70	struct text p_textp; / pointer to text structure */
5cb51551 BJ	71	struct pte p_p0br; / page table base P0BR */
5cb51551 BJ	72	struct proc p_xlink; / linked list of procs sharing same text */
9cf7e873 BJ	73	short p_cpticks; /* ticks of cpu time */
9cf7e873 BJ	74	float p_pctcpu; /* %cpu for this process during p_time */
5cb51551 BJ	75	short p_ndx; /* proc index for memall (because of vfork) */
5cb51551 BJ	76	short p_idhash; /* hashed based on p_pid for kill+exit+... */
36c28aee	77	struct proc p_pptr; / pointer to process structure of parent */
7a5bb6a6 RE	78	struct proc p_cptr; / pointer to youngest living child */
	79	struct proc p_osptr; / pointer to older sibling processes */
	80	struct proc p_ysptr; / pointer to younger siblings */
0cc0777f MT	81	struct pgrp p_pgrp; / pointer to process group */
	82	#define p_session p_pgrp->pg_session
	83	#define p_pgid p_pgrp->pg_id
	84	struct proc p_pgrpnxt; / pointer to next process in process group */
af0b24db	85	struct itimerval p_realtimer;
aa2930e9	86	struct quota p_quota; / quotas for this process */
22a22bd0 MK	87	#if defined(tahoe)
	88	int p_ckey; /* code cache key */
	89	int p_dkey; /* data cache key */
	90	#endif
5cb51551 BJ	91	};
5cb51551 BJ	92
40e2c1d3 SL	93	#define PIDHSZ 64
40e2c1d3 SL	94	#define PIDHASH(pid) ((pid) & (PIDHSZ - 1))
5cb51551 BJ	95
5cb51551 BJ	96	#ifdef KERNEL
0cc0777f	97	pid_t pidhash[PIDHSZ];
5cb51551	98	struct proc *pfind();
0cc0777f MT	99	struct pgrp *pgrphash[PIDHSZ];
0cc0777f MT	100	struct pgrp pgfind(); / find process group by id */
a0eab615	101	struct proc proc, procNPROC; /* the proc table itself */
40e2c1d3 SL	102	struct proc freeproc, zombproc, *allproc;
40e2c1d3 SL	103	/* lists of procs in various states */
a0eab615	104	int nproc;
5cb51551	105
5cb51551 BJ	106	#define NQS 32 /* 32 run queues */
	107	struct prochd {
	108	struct proc ph_link; / linked list of running processes */
	109	struct proc *ph_rlink;
	110	} qs[NQS];
	111	int whichqs; /* bit mask summarizing non-empty qs's */
0cc0777f MT	112
	113	#define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
	114	#define PGRP_JOBC(p) (((p)->p_pgrp != (p)->p_pptr->p_pgrp) && \
	115	((p)->p_session == (p)->p_pptr->p_session))
5cb51551 BJ	116	#endif
	117
	118	/* stat codes */
	119	#define SSLEEP 1 /* awaiting an event */
	120	#define SWAIT 2 /* (abandoned state) */
	121	#define SRUN 3 /* running */
	122	#define SIDL 4 /* intermediate state in process creation */
	123	#define SZOMB 5 /* intermediate state in process termination */
	124	#define SSTOP 6 /* process being traced */
	125
	126	/* flag codes */
7a5bb6a6 RE	127	#define SLOAD 0x0000001 /* in core */
	128	#define SSYS 0x0000002 /* swapper or pager process */
	129	#define SLOCK 0x0000004 /* process being swapped out */
	130	#define SSWAP 0x0000008 /* save area flag */
	131	#define STRC 0x0000010 /* process is being traced */
	132	#define SWTED 0x0000020 /* another tracing flag */
	133	#define SULOCK 0x0000040 /* user settable lock in core */
	134	#define SPAGE 0x0000080 /* process in page wait state */
	135	#define SKEEP 0x0000100 /* another flag to prevent swap out */
40dc6933	136	#define SOMASK 0x0000200 /* restore old mask after taking signal */
7a5bb6a6 RE	137	#define SWEXIT 0x0000400 /* working on exiting */
	138	#define SPHYSIO 0x0000800 /* doing physical i/o (bio.c) */
	139	#define SVFORK 0x0001000 /* process resulted from vfork() */
	140	#define SVFDONE 0x0002000 /* another vfork flag */
	141	#define SNOVM 0x0004000 /* no vm, parent in a vfork() */
	142	#define SPAGI 0x0008000 /* init data space on demand, from inode */
	143	#define SSEQL 0x0010000 /* user warned of sequential vm behavior */
	144	#define SUANOM 0x0020000 /* user warned of random vm behavior */
	145	#define STIMO 0x0040000 /* timing out during sleep */
8673a2cb	146	/* was SDETACH */
40dc6933	147	#define SOUSIG 0x0100000 /* using old signal mechanism */
ded22f45	148	#define SOWEUPC 0x0200000 /* owe process an addupc() call at next ast */
7a5bb6a6 RE	149	#define SSEL 0x0400000 /* selecting; wakeup/waiting danger */
7a5bb6a6 RE	150	#define SLOGIN 0x0800000 /* a login process (legit child of init) */
ae89c651	151	#define SPTECHG 0x1000000 /* pte's for process have changed */
0cc0777f MT	152	#define STRCSYS 0x2000000 /* tracing system calls */
	153	#define STRCSYSI 0x4000000 /* tracing system calls - inherited */
	154	#define SEXEC 0x8000000 /* process called exec */