| 1 | /*- |
| 2 | * Copyright (c) 1986, 1989, 1991 The Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | * @(#)proc.h 7.28 (Berkeley) 5/30/91 |
| 34 | */ |
| 35 | |
| 36 | #ifndef _PROC_H_ |
| 37 | #define _PROC_H_ |
| 38 | |
| 39 | #include <machine/proc.h> /* machine-dependent proc substruct */ |
| 40 | |
| 41 | /* |
| 42 | * One structure allocated per session. |
| 43 | */ |
| 44 | struct session { |
| 45 | int s_count; /* ref cnt; pgrps in session */ |
| 46 | struct proc *s_leader; /* session leader */ |
| 47 | struct vnode *s_ttyvp; /* vnode of controlling terminal */ |
| 48 | struct tty *s_ttyp; /* controlling terminal */ |
| 49 | char s_login[MAXLOGNAME]; /* setlogin() name */ |
| 50 | }; |
| 51 | |
| 52 | /* |
| 53 | * One structure allocated per process group. |
| 54 | */ |
| 55 | struct pgrp { |
| 56 | struct pgrp *pg_hforw; /* forward link in hash bucket */ |
| 57 | struct proc *pg_mem; /* pointer to pgrp members */ |
| 58 | struct session *pg_session; /* pointer to session */ |
| 59 | pid_t pg_id; /* pgrp id */ |
| 60 | int pg_jobc; /* # procs qualifying pgrp for job control */ |
| 61 | }; |
| 62 | |
| 63 | /* |
| 64 | * Description of a process. |
| 65 | * This structure contains the information needed to manage a thread |
| 66 | * of control, known in UN*X as a process; it has references to substructures |
| 67 | * containing descriptions of things that the process uses, but may share |
| 68 | * with related processes. The process structure and the substructures |
| 69 | * are always addressible except for those marked "(PROC ONLY)" below, |
| 70 | * which might be addressible only on a processor on which the process |
| 71 | * is running. |
| 72 | */ |
| 73 | struct proc { |
| 74 | struct proc *p_link; /* doubly-linked run/sleep queue */ |
| 75 | struct proc *p_rlink; |
| 76 | struct proc *p_nxt; /* linked list of active procs */ |
| 77 | struct proc **p_prev; /* and zombies */ |
| 78 | |
| 79 | /* substructures: */ |
| 80 | struct pcred *p_cred; /* process owner's identity */ |
| 81 | struct filedesc *p_fd; /* ptr to open files structure */ |
| 82 | struct pstats *p_stats; /* accounting/statistics (PROC ONLY) */ |
| 83 | struct plimit *p_limit; /* process limits */ |
| 84 | struct vmspace *p_vmspace; /* address space */ |
| 85 | struct sigacts *p_sigacts; /* signal actions, state (PROC ONLY) */ |
| 86 | |
| 87 | #define p_ucred p_cred->pc_ucred |
| 88 | #define p_rlimit p_limit->pl_rlimit |
| 89 | |
| 90 | int p_flag; |
| 91 | char p_stat; |
| 92 | /* char p_space; */ |
| 93 | |
| 94 | pid_t p_pid; /* unique process id */ |
| 95 | struct proc *p_hash; /* hashed based on p_pid for kill+exit+... */ |
| 96 | struct proc *p_pgrpnxt; /* pointer to next process in process group */ |
| 97 | struct proc *p_pptr; /* pointer to process structure of parent */ |
| 98 | struct proc *p_osptr; /* pointer to older sibling processes */ |
| 99 | |
| 100 | /* The following fields are all zeroed upon creation in fork */ |
| 101 | #define p_startzero p_ysptr |
| 102 | struct proc *p_ysptr; /* pointer to younger siblings */ |
| 103 | struct proc *p_cptr; /* pointer to youngest living child */ |
| 104 | |
| 105 | /* scheduling */ |
| 106 | u_int p_cpu; /* cpu usage for scheduling */ |
| 107 | int p_cpticks; /* ticks of cpu time */ |
| 108 | fixpt_t p_pctcpu; /* %cpu for this process during p_time */ |
| 109 | caddr_t p_wchan; /* event process is awaiting */ |
| 110 | u_int p_time; /* resident/nonresident time for swapping */ |
| 111 | u_int p_slptime; /* time since last block */ |
| 112 | |
| 113 | struct itimerval p_realtimer; /* alarm timer */ |
| 114 | struct timeval p_utime; /* user time */ |
| 115 | struct timeval p_stime; /* system time */ |
| 116 | |
| 117 | int p_traceflag; /* kernel trace points */ |
| 118 | struct vnode *p_tracep;/* trace to vnode */ |
| 119 | |
| 120 | int p_sig; /* signals pending to this process */ |
| 121 | |
| 122 | /* end area that is zeroed on creation */ |
| 123 | #define p_endzero p_startcopy |
| 124 | |
| 125 | /* The following fields are all copied upon creation in fork */ |
| 126 | sigset_t p_sigmask; /* current signal mask */ |
| 127 | #define p_startcopy p_sigmask |
| 128 | sigset_t p_sigignore; /* signals being ignored */ |
| 129 | sigset_t p_sigcatch; /* signals being caught by user */ |
| 130 | |
| 131 | u_char p_pri; /* priority, negative is high */ |
| 132 | u_char p_usrpri; /* user-priority based on p_cpu and p_nice */ |
| 133 | char p_nice; /* nice for cpu usage */ |
| 134 | /* char p_space1; */ |
| 135 | |
| 136 | struct pgrp *p_pgrp; /* pointer to process group */ |
| 137 | char p_comm[MAXCOMLEN+1]; |
| 138 | |
| 139 | /* end area that is copied on creation */ |
| 140 | #define p_endcopy p_wmesg |
| 141 | char *p_wmesg; /* reason for sleep */ |
| 142 | int p_thread; /* id for this "thread" (Mach glue) XXX */ |
| 143 | struct user *p_addr; /* kernel virtual addr of u-area (PROC ONLY) */ |
| 144 | swblk_t p_swaddr; /* disk address of u area when swapped */ |
| 145 | int *p_regs; /* saved registers during syscall/trap */ |
| 146 | struct mdproc p_md; /* any machine-dependent fields */ |
| 147 | |
| 148 | u_short p_xstat; /* Exit status for wait; also stop signal */ |
| 149 | u_short p_dupfd; /* sideways return value from fdopen XXX */ |
| 150 | u_short p_acflag; /* accounting flags */ |
| 151 | /* short p_space2; */ |
| 152 | struct rusage *p_ru; /* exit information XXX */ |
| 153 | |
| 154 | long p_spare[4]; /* tmp spares to avoid shifting eproc */ |
| 155 | }; |
| 156 | |
| 157 | #define p_session p_pgrp->pg_session |
| 158 | #define p_pgid p_pgrp->pg_id |
| 159 | |
| 160 | /* MOVE TO ucred.h? */ |
| 161 | /* |
| 162 | * Shareable process credentials (always resident). |
| 163 | * This includes a reference to the current user credentials |
| 164 | * as well as real and saved ids that may be used to change ids. |
| 165 | */ |
| 166 | struct pcred { |
| 167 | struct ucred *pc_ucred; /* current credentials */ |
| 168 | uid_t p_ruid; /* real user id */ |
| 169 | uid_t p_svuid; /* saved effective user id */ |
| 170 | gid_t p_rgid; /* real group id */ |
| 171 | gid_t p_svgid; /* saved effective group id */ |
| 172 | int p_refcnt; /* number of references */ |
| 173 | }; |
| 174 | |
| 175 | /* stat codes */ |
| 176 | #define SSLEEP 1 /* awaiting an event */ |
| 177 | #define SWAIT 2 /* (abandoned state) */ |
| 178 | #define SRUN 3 /* running */ |
| 179 | #define SIDL 4 /* intermediate state in process creation */ |
| 180 | #define SZOMB 5 /* intermediate state in process termination */ |
| 181 | #define SSTOP 6 /* process being traced */ |
| 182 | |
| 183 | /* flag codes */ |
| 184 | #define SLOAD 0x0000001 /* in core */ |
| 185 | #define SSYS 0x0000002 /* swapper or pager process */ |
| 186 | #define SSINTR 0x0000004 /* sleep is interruptible */ |
| 187 | #define SCTTY 0x0000008 /* has a controlling terminal */ |
| 188 | #define SPPWAIT 0x0000010 /* parent is waiting for child to exec/exit */ |
| 189 | #define SEXEC 0x0000020 /* process called exec */ |
| 190 | #define STIMO 0x0000040 /* timing out during sleep */ |
| 191 | #define SSEL 0x0000080 /* selecting; wakeup/waiting danger */ |
| 192 | #define SWEXIT 0x0000100 /* working on exiting */ |
| 193 | #define SNOCLDSTOP 0x0000200 /* no SIGCHLD when children stop */ |
| 194 | /* the following three should probably be changed into a hold count */ |
| 195 | #define SLOCK 0x0000400 /* process being swapped out */ |
| 196 | #define SKEEP 0x0000800 /* another flag to prevent swap out */ |
| 197 | #define SPHYSIO 0x0001000 /* doing physical i/o */ |
| 198 | #define STRC 0x0004000 /* process is being traced */ |
| 199 | #define SWTED 0x0008000 /* another tracing flag */ |
| 200 | #define SADVLCK 0x0040000 /* process may hold a POSIX advisory lock */ |
| 201 | /* the following should be moved to machine-dependent areas */ |
| 202 | #define SOWEUPC 0x0002000 /* owe process an addupc() call at next ast */ |
| 203 | #ifdef HPUXCOMPAT |
| 204 | #define SHPUX 0x0010000 /* HP-UX process (HPUXCOMPAT) */ |
| 205 | #else |
| 206 | #define SHPUX 0 /* not HP-UX process (HPUXCOMPAT) */ |
| 207 | #endif |
| 208 | /* not currently in use (never set) */ |
| 209 | #define SPAGE 0x0020000 /* process in page wait state */ |
| 210 | |
| 211 | #ifdef KERNEL |
| 212 | /* |
| 213 | * We use process IDs <= PID_MAX; |
| 214 | * PID_MAX + 1 must also fit in a pid_t |
| 215 | * (used to represent "no process group"). |
| 216 | */ |
| 217 | #define PID_MAX 30000 |
| 218 | #define NO_PID 30001 |
| 219 | #define PIDHASH(pid) ((pid) & pidhashmask) |
| 220 | |
| 221 | #define SESS_LEADER(p) ((p)->p_session->s_leader == (p)) |
| 222 | #define SESSHOLD(s) ((s)->s_count++) |
| 223 | #define SESSRELE(s) { \ |
| 224 | if (--(s)->s_count == 0) \ |
| 225 | FREE(s, M_SESSION); \ |
| 226 | } |
| 227 | |
| 228 | extern int pidhashmask; /* in param.c */ |
| 229 | extern struct proc *pidhash[]; /* in param.c */ |
| 230 | struct proc *pfind(); /* find process by id */ |
| 231 | extern struct pgrp *pgrphash[]; /* in param.c */ |
| 232 | struct pgrp *pgfind(); /* find process group by id */ |
| 233 | struct proc *zombproc, *allproc; /* lists of procs in various states */ |
| 234 | extern struct proc proc0; /* process slot for swapper */ |
| 235 | struct proc *initproc, *pageproc; /* process slots for init, pager */ |
| 236 | extern struct proc *curproc; /* current running proc */ |
| 237 | extern int nprocs, maxproc; /* current and max number of procs */ |
| 238 | |
| 239 | #define NQS 32 /* 32 run queues */ |
| 240 | struct prochd { |
| 241 | struct proc *ph_link; /* linked list of running processes */ |
| 242 | struct proc *ph_rlink; |
| 243 | } qs[NQS]; |
| 244 | |
| 245 | int whichqs; /* bit mask summarizing non-empty qs's */ |
| 246 | #endif /* KERNEL */ |
| 247 | |
| 248 | #endif /* !_PROC_H_ */ |