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1.1 root 1: /*
2: * Copyright (c) 1982, 1986 Regents of the University of California.
3: * All rights reserved. The Berkeley software License Agreement
4: * specifies the terms and conditions for redistribution.
5: *
6: * @(#)proc.h 7.2 (Berkeley) 10/13/86
7: */
8:
9: /*
10: * One structure allocated per active
11: * process. It contains all data needed
12: * about the process while the
13: * process may be swapped out.
14: * Other per process data (user.h)
15: * is swapped with the process.
16: */
17: struct proc {
18: struct proc *p_link; /* linked list of running processes */
19: struct proc *p_rlink;
20: struct proc *p_nxt; /* linked list of allocated proc slots */
21: struct proc **p_prev; /* also zombies, and free proc's */
22: struct pte *p_addr; /* u-area kernel map address */
23: char p_usrpri; /* user-priority based on p_cpu and p_nice */
24: char p_pri; /* priority, negative is high */
25: char p_cpu; /* cpu usage for scheduling */
26: char p_stat;
27: char p_time; /* resident time for scheduling */
28: char p_nice; /* nice for cpu usage */
29: char p_slptime; /* time since last block */
30: char p_cursig;
31: int p_sig; /* signals pending to this process */
32: int p_sigmask; /* current signal mask */
33: int p_sigignore; /* signals being ignored */
34: int p_sigcatch; /* signals being caught by user */
35: int p_flag;
36: uid_t p_uid; /* user id, used to direct tty signals */
37: short p_pgrp; /* name of process group leader */
38: short p_pid; /* unique process id */
39: short p_ppid; /* process id of parent */
40: u_short p_xstat; /* Exit status for wait */
41: struct rusage *p_ru; /* mbuf holding exit information */
42: short p_poip; /* page outs in progress */
43: short p_szpt; /* copy of page table size */
44: size_t p_tsize; /* size of text (clicks) */
45: size_t p_dsize; /* size of data space (clicks) */
46: size_t p_ssize; /* copy of stack size (clicks) */
47: size_t p_rssize; /* current resident set size in clicks */
48: size_t p_maxrss; /* copy of u.u_limit[MAXRSS] */
49: size_t p_swrss; /* resident set size before last swap */
50: swblk_t p_swaddr; /* disk address of u area when swapped */
51: caddr_t p_wchan; /* event process is awaiting */
52: struct text *p_textp; /* pointer to text structure */
53: struct pte *p_p0br; /* page table base P0BR */
54: struct proc *p_xlink; /* linked list of procs sharing same text */
55: short p_cpticks; /* ticks of cpu time */
56: float p_pctcpu; /* %cpu for this process during p_time */
57: short p_ndx; /* proc index for memall (because of vfork) */
58: short p_idhash; /* hashed based on p_pid for kill+exit+... */
59: struct proc *p_pptr; /* pointer to process structure of parent */
60: struct proc *p_cptr; /* pointer to youngest living child */
61: struct proc *p_osptr; /* pointer to older sibling processes */
62: struct proc *p_ysptr; /* pointer to younger siblings */
63: struct itimerval p_realtimer;
64: struct quota *p_quota; /* quotas for this process */
65: #if defined(tahoe)
66: int p_ckey; /* code cache key */
67: int p_dkey; /* data cache key */
68: #endif
69: };
70:
71: #define PIDHSZ 64
72: #define PIDHASH(pid) ((pid) & (PIDHSZ - 1))
73:
74: #ifdef KERNEL
75: short pidhash[PIDHSZ];
76: struct proc *pfind();
77: struct proc *proc, *procNPROC; /* the proc table itself */
78: struct proc *freeproc, *zombproc, *allproc;
79: /* lists of procs in various states */
80: int nproc;
81:
82: #define NQS 32 /* 32 run queues */
83: struct prochd {
84: struct proc *ph_link; /* linked list of running processes */
85: struct proc *ph_rlink;
86: } qs[NQS];
87: int whichqs; /* bit mask summarizing non-empty qs's */
88: #endif
89:
90: /* stat codes */
91: #define SSLEEP 1 /* awaiting an event */
92: #define SWAIT 2 /* (abandoned state) */
93: #define SRUN 3 /* running */
94: #define SIDL 4 /* intermediate state in process creation */
95: #define SZOMB 5 /* intermediate state in process termination */
96: #define SSTOP 6 /* process being traced */
97:
98: /* flag codes */
99: #define SLOAD 0x0000001 /* in core */
100: #define SSYS 0x0000002 /* swapper or pager process */
101: #define SLOCK 0x0000004 /* process being swapped out */
102: #define SSWAP 0x0000008 /* save area flag */
103: #define STRC 0x0000010 /* process is being traced */
104: #define SWTED 0x0000020 /* another tracing flag */
105: #define SULOCK 0x0000040 /* user settable lock in core */
106: #define SPAGE 0x0000080 /* process in page wait state */
107: #define SKEEP 0x0000100 /* another flag to prevent swap out */
108: #define SOMASK 0x0000200 /* restore old mask after taking signal */
109: #define SWEXIT 0x0000400 /* working on exiting */
110: #define SPHYSIO 0x0000800 /* doing physical i/o (bio.c) */
111: #define SVFORK 0x0001000 /* process resulted from vfork() */
112: #define SVFDONE 0x0002000 /* another vfork flag */
113: #define SNOVM 0x0004000 /* no vm, parent in a vfork() */
114: #define SPAGI 0x0008000 /* init data space on demand, from inode */
115: #define SSEQL 0x0010000 /* user warned of sequential vm behavior */
116: #define SUANOM 0x0020000 /* user warned of random vm behavior */
117: #define STIMO 0x0040000 /* timing out during sleep */
118: /* was SDETACH */
119: #define SOUSIG 0x0100000 /* using old signal mechanism */
120: #define SOWEUPC 0x0200000 /* owe process an addupc() call at next ast */
121: #define SSEL 0x0400000 /* selecting; wakeup/waiting danger */
122: #define SLOGIN 0x0800000 /* a login process (legit child of init) */
123: #define SPTECHG 0x1000000 /* pte's for process have changed */
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