1 /* 2 * Copyright (c) 1982, 1986, 1989 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 7.17 (Berkeley) 05/23/90 7 */ 8 9 /* 10 * One structure allocated per session. 11 */ 12 struct session { 13 int s_count; /* ref cnt; pgrps in session */ 14 struct proc *s_leader; /* session leader */ 15 struct vnode *s_ttyvp; /* vnode of controlling terminal */ 16 struct tty *s_ttyp; /* controlling terminal */ 17 }; 18 19 /* 20 * One structure allocated per process group. 21 */ 22 struct pgrp { 23 struct pgrp *pg_hforw; /* forward link in hash bucket */ 24 struct proc *pg_mem; /* pointer to pgrp members */ 25 struct session *pg_session; /* pointer to session */ 26 pid_t pg_id; /* pgrp id */ 27 int pg_jobc; /* # procs qualifying pgrp for job control */ 28 }; 29 30 /* 31 * One structure allocated per active 32 * process. It contains all data needed 33 * about the process while the 34 * process may be swapped out. 35 * Other per process data (user.h) 36 * is swapped with the process. 37 */ 38 39 #define MAXCOMLEN 16 /* <= MAXNAMLEN, >= sizeof(ac_comm) */ 40 #define MAXLOGNAME 12 /* >= UT_NAMESIZE */ 41 42 struct proc { 43 struct proc *p_link; /* linked list of running processes */ 44 struct proc *p_rlink; 45 struct proc *p_nxt; /* linked list of allocated proc slots */ 46 struct proc **p_prev; /* also zombies, and free proc's */ 47 struct pte *p_addr; /* u-area kernel map address */ 48 char p_usrpri; /* user-priority based on p_cpu and p_nice */ 49 char p_pri; /* priority, negative is high */ 50 char p_cpu; /* cpu usage for scheduling */ 51 char p_stat; 52 char p_time; /* resident time for scheduling */ 53 char p_nice; /* nice for cpu usage */ 54 char p_slptime; /* time since last block */ 55 char p_cursig; 56 int p_sig; /* signals pending to this process */ 57 int p_sigmask; /* current signal mask */ 58 int p_sigignore; /* signals being ignored */ 59 int p_sigcatch; /* signals being caught by user */ 60 int p_flag; 61 uid_t p_uid; /* effective user id */ 62 uid_t p_ruid; /* real user id */ 63 uid_t p_svuid; /* saved effective user id */ 64 gid_t p_rgid; /* real group id */ 65 gid_t p_svgid; /* saved effective group id */ 66 pid_t p_pid; /* unique process id */ 67 pid_t p_ppid; /* process id of parent */ 68 u_short p_xstat; /* Exit status for wait */ 69 struct rusage *p_ru; /* exit information */ 70 short p_poip; /* page outs in progress */ 71 short p_szpt; /* copy of page table size */ 72 segsz_t p_tsize; /* size of text (clicks) */ 73 segsz_t p_dsize; /* size of data space (clicks) */ 74 segsz_t p_mmsize; /* size of mapmem beyond p_dsize (clicks) */ 75 segsz_t p_ssize; /* copy of stack size (clicks) */ 76 segsz_t p_rssize; /* current resident set size in clicks */ 77 segsz_t p_maxrss; /* copy of u.u_limit[MAXRSS] */ 78 segsz_t p_swrss; /* resident set size before last swap */ 79 swblk_t p_swaddr; /* disk address of u area when swapped */ 80 caddr_t p_wchan; /* event process is awaiting */ 81 struct text *p_textp; /* pointer to text structure */ 82 struct pte *p_p0br; /* page table base P0BR */ 83 struct proc *p_xlink; /* linked list of procs sharing same text */ 84 int p_cpticks; /* ticks of cpu time */ 85 fixpt_t p_pctcpu; /* %cpu for this process during p_time */ 86 short p_ndx; /* proc index for memall (because of vfork) */ 87 struct proc *p_hash; /* hashed based on p_pid for kill+exit+... */ 88 struct proc *p_pptr; /* pointer to process structure of parent */ 89 struct proc *p_cptr; /* pointer to youngest living child */ 90 struct proc *p_osptr; /* pointer to older sibling processes */ 91 struct proc *p_ysptr; /* pointer to younger siblings */ 92 struct pgrp *p_pgrp; /* pointer to process group */ 93 #define p_session p_pgrp->pg_session 94 #define p_pgid p_pgrp->pg_id 95 struct proc *p_pgrpnxt; /* pointer to next process in process group */ 96 struct itimerval p_realtimer; 97 int p_traceflag; /* kernel trace points */ 98 struct vnode *p_tracep;/* trace to vnode */ 99 char p_comm[MAXCOMLEN+1]; 100 char p_logname[MAXLOGNAME]; 101 char *p_wmesg; 102 struct timeval p_utime; /* user time */ 103 struct timeval p_stime; /* system time */ 104 #if defined(tahoe) 105 int p_ckey; /* code cache key */ 106 int p_dkey; /* data cache key */ 107 #endif 108 }; 109 110 /* 111 * proc ops return arrays of augmented proc structures 112 */ 113 struct kinfo_proc { 114 struct proc kp_proc; /* proc structure */ 115 struct eproc { 116 struct proc *e_paddr; /* address of proc */ 117 struct session *e_sess; /* session pointer */ 118 pid_t e_pgid; /* process group id */ 119 short e_jobc; /* job control counter */ 120 dev_t e_tdev; /* controlling tty dev */ 121 pid_t e_tpgid; /* tty process group id */ 122 struct session *e_tsess; /* tty session pointer */ 123 #define WMESGLEN 7 124 char e_wmesg[WMESGLEN+1]; /* wchan message */ 125 segsz_t e_xsize; /* text size */ 126 short e_xrssize; /* text rss */ 127 short e_xccount; /* text references */ 128 short e_xswrss; 129 long e_flag; 130 #define EPROC_CTTY 0x01 /* controlling tty vnode active */ 131 #define EPROC_SLEADER 0x02 /* session leader */ 132 long e_spare[7]; 133 } kp_eproc; 134 }; 135 136 #ifdef KERNEL 137 #define PIDHASH(pid) ((pid) & pidhashmask) 138 extern int pidhashmask; /* in param.c */ 139 extern struct proc *pidhash[]; /* in param.c */ 140 struct proc *pfind(); /* find process by id */ 141 extern struct pgrp *pgrphash[]; /* in param.c */ 142 struct pgrp *pgfind(); /* find process group by id */ 143 struct proc *proc, *procNPROC; /* the proc table itself */ 144 struct proc *freeproc, *zombproc, *allproc; 145 /* lists of procs in various states */ 146 int nproc; 147 148 #define NQS 32 /* 32 run queues */ 149 struct prochd { 150 struct proc *ph_link; /* linked list of running processes */ 151 struct proc *ph_rlink; 152 } qs[NQS]; 153 int whichqs; /* bit mask summarizing non-empty qs's */ 154 155 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p)) 156 #define SESSHOLD(s) ((s)->s_count++) 157 #define SESSRELE(s) { \ 158 if (--(s)->s_count == 0) \ 159 FREE(s, M_SESSION); \ 160 } 161 #endif 162 163 /* stat codes */ 164 #define SSLEEP 1 /* awaiting an event */ 165 #define SWAIT 2 /* (abandoned state) */ 166 #define SRUN 3 /* running */ 167 #define SIDL 4 /* intermediate state in process creation */ 168 #define SZOMB 5 /* intermediate state in process termination */ 169 #define SSTOP 6 /* process being traced */ 170 171 /* flag codes */ 172 #define SLOAD 0x0000001 /* in core */ 173 #define SSYS 0x0000002 /* swapper or pager process */ 174 #define SLOCK 0x0000004 /* process being swapped out */ 175 #define SSWAP 0x0000008 /* save area flag */ 176 #define STRC 0x0000010 /* process is being traced */ 177 #define SWTED 0x0000020 /* another tracing flag */ 178 #define SSINTR 0x0000040 /* sleep is interruptible */ 179 #define SPAGE 0x0000080 /* process in page wait state */ 180 #define SKEEP 0x0000100 /* another flag to prevent swap out */ 181 #define SOMASK 0x0000200 /* restore old mask after taking signal */ 182 #define SWEXIT 0x0000400 /* working on exiting */ 183 #define SPHYSIO 0x0000800 /* doing physical i/o */ 184 #define SVFORK 0x0001000 /* process resulted from vfork() */ 185 #define SVFDONE 0x0002000 /* another vfork flag */ 186 #define SNOVM 0x0004000 /* no vm, parent in a vfork() */ 187 #define SPAGV 0x0008000 /* init data space on demand, from vnode */ 188 #define SSEQL 0x0010000 /* user warned of sequential vm behavior */ 189 #define SUANOM 0x0020000 /* user warned of random vm behavior */ 190 #define STIMO 0x0040000 /* timing out during sleep */ 191 #define SNOCLDSTOP 0x0080000 /* no SIGCHLD when children stop */ 192 #define SCTTY 0x0100000 /* has a controlling terminal */ 193 #define SOWEUPC 0x0200000 /* owe process an addupc() call at next ast */ 194 #define SSEL 0x0400000 /* selecting; wakeup/waiting danger */ 195 #define SEXEC 0x0800000 /* process called exec */ 196 #define SHPUX 0x1000000 /* HP-UX process (HPUXCOMPAT) */ 197 #define SULOCK 0x2000000 /* locked in core after swap error XXX */ 198 #define SPTECHG 0x4000000 /* pte's for process have changed XXX */ 199