/*- * Copyright (c) 1986, 1989, 1991, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)proc.h 8.15 (Berkeley) 5/19/95 * $FreeBSD: src/sys/sys/proc.h,v 1.99.2.9 2003/06/06 20:21:32 tegge Exp $ * $DragonFly: src/sys/sys/proc.h,v 1.82 2006/06/07 03:02:11 dillon Exp $ */ #ifndef _SYS_PROC_H_ #define _SYS_PROC_H_ #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES) #error "Userland must include sys/user.h instead of sys/proc.h" #else #include /* For struct callout_handle. */ #include #include #include /* For struct rtprio. */ #include #ifndef _KERNEL #include /* For structs itimerval, timeval. */ #endif #include #include /* For struct klist */ #include #include #include #include #ifdef _KERNEL #include #endif #include #include #include /* Machine-dependent proc substruct. */ /* * One structure allocated per session. */ struct session { int s_count; /* Ref cnt; pgrps in session. */ struct proc *s_leader; /* Session leader. */ struct vnode *s_ttyvp; /* Vnode of controlling terminal. */ struct tty *s_ttyp; /* Controlling terminal. */ pid_t s_sid; /* Session ID */ char s_login[roundup(MAXLOGNAME, sizeof(long))]; /* Setlogin() name. */ }; /* * One structure allocated per process group. */ struct pgrp { LIST_ENTRY(pgrp) pg_hash; /* Hash chain. */ LIST_HEAD(, proc) pg_members; /* Pointer to pgrp members. */ struct session *pg_session; /* Pointer to session. */ struct sigiolst pg_sigiolst; /* List of sigio sources. */ pid_t pg_id; /* Pgrp id. */ int pg_jobc; /* # procs qualifying pgrp for job control */ }; struct procsig { sigset_t ps_sigignore; /* Signals being ignored. */ sigset_t ps_sigcatch; /* Signals being caught by user. */ int ps_flag; struct sigacts *ps_sigacts; int ps_refcnt; }; #define PS_NOCLDWAIT 0x0001 /* No zombies if child dies */ #define PS_NOCLDSTOP 0x0002 /* No SIGCHLD when children stop. */ /* * pargs, used to hold a copy of the command line, if it had a sane * length */ struct pargs { u_int ar_ref; /* Reference count */ u_int ar_length; /* Length */ u_char ar_args[0]; /* Arguments */ }; /* * Description of a process. * * This structure contains the information needed to manage a thread of * control, known in UN*X as a process; it has references to substructures * containing descriptions of things that the process uses, but may share * with related processes. The process structure and the substructures * are always addressable except for those marked "(PROC ONLY)" below, * which might be addressable only on a processor on which the process * is running. * * NOTE! The process start time is stored in the thread structure associated * with the process. If the process is a Zombie, then this field will be * inaccessible due to the thread structure being free'd in kern_wait1(). */ struct jail; struct ktrace_node; struct lwp { TAILQ_ENTRY(lwp) lwp_procq; /* run/sleep queue. */ LIST_ENTRY(lwp) lwp_list; /* List of all threads in the proc. */ struct proc *lwp_proc; /* Link to our proc. */ int lwp_tid; /* Our thread id . */ struct pstats *lwp_stats; /* Accounting/statistics (PROC ONLY). */ #ifdef notyet int lwp_flag; /* P_* flags. */ char lwp_stat; /* S* process status. */ #endif #define lwp_startzero lwp_dupfd int lwp_dupfd; /* Sideways return value from fdopen. XXX */ /* * Scheduling. */ sysclock_t lwp_cpticks; /* cpu used in sched clock ticks */ sysclock_t lwp_cpbase; /* Measurement base */ fixpt_t lwp_pctcpu; /* %cpu for this process */ u_int lwp_swtime; /* Time swapped in or out. */ u_int lwp_slptime; /* Time since last blocked. */ int lwp_traceflag; /* Kernel trace points. */ union usched_data lwp_usdata; /* User scheduler specific */ #define lwp_endzero lwp_startcopy #define lwp_startcopy lwp_cpumask cpumask_t lwp_cpumask; sigset_t lwp_siglist; /* Signals arrived but not delivered. */ sigset_t lwp_oldsigmask; /* saved mask from before sigpause */ sigset_t lwp_sigmask; /* Current signal mask. */ stack_t lwp_sigstk; /* sp & on stack state variable */ struct rtprio lwp_rtprio; /* Realtime priority. */ #define lwp_endcopy lwp_md #ifdef notyet struct user *lwp_addr; /* XXX Really struct user? */ #endif struct mdproc lwp_md; /* Any machine-dependent fields. */ struct thread *lwp_thread; /* backpointer to proc's thread */ struct upcall *lwp_upcall; /* REGISTERED USERLAND POINTER! */ }; struct proc { LIST_ENTRY(proc) p_list; /* List of all processes. */ /* substructures: */ struct ucred *p_ucred; /* Process owner's identity. */ struct filedesc *p_fd; /* Ptr to open files structure. */ struct filedesc_to_leader *p_fdtol; /* Ptr to tracking node XXX lwp */ #define p_stats p_lwp.lwp_stats struct plimit *p_limit; /* Process limits. */ void *p_pad0; struct procsig *p_procsig; #define p_sigacts p_procsig->ps_sigacts #define p_sigignore p_procsig->ps_sigignore #define p_sigcatch p_procsig->ps_sigcatch #define p_rlimit p_limit->pl_rlimit int p_flag; /* P_* flags. */ char p_stat; /* S* process status. */ char p_pad1[3]; pid_t p_pid; /* Process identifier. */ LIST_ENTRY(proc) p_hash; /* Hash chain. */ LIST_ENTRY(proc) p_pglist; /* List of processes in pgrp. */ struct proc *p_pptr; /* Pointer to parent process. */ LIST_ENTRY(proc) p_sibling; /* List of sibling processes. */ LIST_HEAD(, proc) p_children; /* Pointer to list of children. */ struct callout p_ithandle; /* for scheduling p_realtimer */ struct varsymset p_varsymset; /* The following fields are all zeroed upon creation in fork. */ #define p_startzero p_oppid pid_t p_oppid; /* Save parent pid during ptrace. XXX */ struct vmspace *p_vmspace; /* Address space. */ #define p_cpticks p_lwp.lwp_cpticks #define p_cpbase p_lwp.lwp_cpbase #define p_pctcpu p_lwp.lwp_pctcpu #define p_swtime p_lwp.lwp_swtime #define p_slptime p_lwp.lwp_slptime struct itimerval p_realtimer; /* Alarm timer. */ struct itimerval p_timer[3]; /* Virtual-time timers. */ int p_traceflag; /* Kernel trace points. */ struct ktrace_node *p_tracenode; /* Trace to vnode. */ sigset_t p_siglist; /* Signals arrived but not delivered. */ struct vnode *p_textvp; /* Vnode of executable. */ #define p_usdata p_lwp.lwp_usdata unsigned int p_stops; /* procfs event bitmask */ unsigned int p_stype; /* procfs stop event type */ char p_step; /* procfs stop *once* flag */ unsigned char p_pfsflags; /* procfs flags */ char p_pad2[2]; /* padding for alignment */ struct sigiolst p_sigiolst; /* list of sigio sources */ int p_sigparent; /* signal to parent on exit */ #define p_oldsigmask p_lwp.lwp_oldsigmask int p_sig; /* for core dump/debugger XXX */ u_long p_code; /* for core dump/debugger XXX */ struct klist p_klist; /* knotes attached to this process */ struct timeval p_start; /* start time for a process */ /* End area that is zeroed on creation. */ #define p_endzero p_startcopy /* The following fields are all copied upon creation in fork. */ #define p_startcopy p_comm #define p_sigmask p_lwp.lwp_sigmask #define p_sigstk p_lwp.lwp_sigstk char p_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */ char p_lock; /* Process lock (prevent swap) count. */ char p_nice; /* Process "nice" value. */ char p_pad3; struct pgrp *p_pgrp; /* Pointer to process group. */ struct sysentvec *p_sysent; /* System call dispatch information. */ struct uprof p_prof; /* Profiling arguments. */ struct rtprio p_rtprio; /* Realtime priority. */ struct pargs *p_args; /* End area that is copied on creation. */ #define p_endcopy p_addr struct user *p_addr; /* Kernel virtual addr of u-area (PROC ONLY) XXX lwp */ #define p_md p_lwp.lwp_md u_short p_xstat; /* Exit status or last stop signal */ u_short p_acflag; /* Accounting flags. */ struct rusage *p_ru; /* Exit information. XXX */ int p_nthreads; /* Number of threads in this process. */ int p_nstopped; /* Number of stopped threads. */ int p_lasttid; /* Last tid used. */ LIST_HEAD(, lwp) p_lwps; /* List of threads in this process. */ void *p_aioinfo; /* ASYNC I/O info */ int p_wakeup; /* thread id XXX lwp */ struct proc *p_peers; /* XXX lwp */ struct proc *p_leader; /* XXX lwp */ void *p_emuldata; /* process-specific emulator state */ #define p_thread p_lwp.lwp_thread struct usched *p_usched; /* Userland scheduling control */ int p_numposixlocks; /* number of POSIX locks */ struct lwp p_lwp; /* Embedded lwp XXX */ struct spinlock p_spin; /* Spinlock for LWP access to proc */ }; #if defined(_KERNEL) #define p_wchan p_thread->td_wchan #define p_wmesg p_thread->td_wmesg #define p_session p_pgrp->pg_session #define p_pgid p_pgrp->pg_id #endif /* * Status values. Please note that p_stat doesn't actually take on * synthesized states. */ #define SIDL 1 /* Process being created by fork. */ #define SRUN 2 /* Currently runnable. */ #define SSLEEP 3 /* Sleeping on an address. */ #define SSTOP 4 /* Synthesized from SSLEEP + P_STOPPED */ #define SZOMB 5 /* Synthesized from P_ZOMBIE for eproc only */ #define STHREAD 6 /* Synthesized for eproc only */ /* These flags are kept in p_flags. */ #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */ #define P_CONTROLT 0x00002 /* Has a controlling terminal. */ #define P_SWAPPEDOUT 0x00004 /* Swapped out of memory */ #define P_BREAKTSLEEP 0x00008 /* Event pending, break tsleep on sigcont */ #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */ #define P_PROFIL 0x00020 /* Has started profiling. */ #define P_SELECT 0x00040 /* Selecting; wakeup/waiting danger. */ #define P_SINTR 0x00080 /* Sleep is interruptible. */ #define P_SUGID 0x00100 /* Had set id privileges since last exec. */ #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */ #define P_STOPPED 0x00400 /* SIGSTOP status */ #define P_TRACED 0x00800 /* Debugged process being traced. */ #define P_WAITED 0x01000 /* SIGSTOP status was returned by wait3/4 */ #define P_WEXIT 0x02000 /* Working on exiting. */ #define P_EXEC 0x04000 /* Process called exec. */ /* Should probably be changed into a hold count. */ /* was P_NOSWAP 0x08000 was: Do not swap upages; p->p_hold */ /* was P_PHYSIO 0x10000 was: Doing physical I/O; use p->p_hold */ #define P_UPCALLPEND 0x20000 /* an upcall is pending */ #define P_SWAPWAIT 0x40000 /* Waiting for a swapin */ #define P_ZOMBIE 0x80000 /* Now in a zombied state */ /* Marked a kernel thread */ #define P_ONRUNQ 0x100000 /* on a user scheduling run queue */ #define P_KTHREADP 0x200000 /* Process is really a kernel thread */ #define P_IDLESWAP 0x400000 /* Swapout was due to idleswap, not load */ #define P_DEADLKTREAT 0x800000 /* lock aquisition - deadlock treatment */ #define P_JAILED 0x1000000 /* Process is in jail */ #define P_OLDMASK 0x2000000 /* need to restore mask before pause */ #define P_ALTSTACK 0x4000000 /* have alternate signal stack */ #define P_INEXEC 0x8000000 /* Process is in execve(). */ #define P_PASSIVE_ACQ 0x10000000 /* Passive acquire cpu (see kern_switch) */ #define P_UPCALLWAIT 0x20000000 /* Wait for upcall or signal */ #define P_XCPU 0x40000000 /* SIGXCPU */ #ifdef _KERNEL #ifdef MALLOC_DECLARE MALLOC_DECLARE(M_SESSION); MALLOC_DECLARE(M_SUBPROC); MALLOC_DECLARE(M_ZOMBIE); MALLOC_DECLARE(M_PARGS); #endif /* flags for suser_xxx() */ #define PRISON_ROOT 0x1 #define NULL_CRED_OKAY 0x2 /* Handy macro to determine if p1 can mangle p2 */ #define PRISON_CHECK(cr1, cr2) \ ((!(cr1)->cr_prison) || (cr1)->cr_prison == (cr2)->cr_prison) /* * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t, * as it is used to represent "no process group". */ #define PID_MAX 99999 #define NO_PID 100000 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p)) /* * STOPEVENT */ extern void stopevent(struct proc*, unsigned int, unsigned int); #define STOPEVENT(p,e,v) \ do { \ if ((p)->p_stops & (e)) { \ stopevent(p,e,v); \ } \ } while (0) /* hold process U-area in memory, normally for ptrace/procfs work */ #define PHOLD(p) (++(p)->p_lock) #define PRELE(p) (--(p)->p_lock) #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash]) extern LIST_HEAD(pidhashhead, proc) *pidhashtbl; extern u_long pidhash; #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash]) extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl; extern u_long pgrphash; #if 0 #ifndef SET_CURPROC #define SET_CURPROC(p) (curproc = (p)) #endif #endif extern struct proc proc0; /* Process slot for swapper. */ extern struct thread thread0; /* Thread slot for swapper. */ extern int hogticks; /* Limit on kernel cpu hogs. */ extern int nprocs, maxproc; /* Current and max number of procs. */ extern int maxprocperuid; /* Max procs per uid. */ extern int sched_quantum; /* Scheduling quantum in ticks */ LIST_HEAD(proclist, proc); extern struct proclist allproc; /* List of all processes. */ extern struct proclist zombproc; /* List of zombie processes. */ extern struct proc *initproc; /* Process slot for init */ extern struct thread *pagethread, *updatethread; /* * Scheduler independant variables. The primary scheduler polling frequency, * the maximum ESTCPU value, and the weighting factor for nice values. A * cpu bound program's estcpu will increase to ESTCPUMAX - 1. */ #define ESTCPUFREQ 50 extern u_long ps_arg_cache_limit; extern int ps_argsopen; extern int ps_showallprocs; struct proc *pfind (pid_t); /* Find process by id. */ struct pgrp *pgfind (pid_t); /* Find process group by id. */ struct proc *zpfind (pid_t); /* Find zombie process by id. */ struct vm_zone; struct globaldata; extern struct vm_zone *proc_zone; int enterpgrp (struct proc *p, pid_t pgid, int mksess); void proc_add_allproc(struct proc *p); void proc_move_allproc_zombie(struct proc *); void proc_remove_zombie(struct proc *); void allproc_scan(int (*callback)(struct proc *, void *), void *data); void zombproc_scan(int (*callback)(struct proc *, void *), void *data); void fixjobc (struct proc *p, struct pgrp *pgrp, int entering); void updatepcpu(struct lwp *, int, int); int inferior (struct proc *p); int leavepgrp (struct proc *p); void sess_hold(struct session *sp); void sess_rele(struct session *sp); void mi_switch (struct proc *p); void procinit (void); void relscurproc(struct proc *curp); int p_trespass (struct ucred *cr1, struct ucred *cr2); void setrunnable (struct proc *); void clrrunnable (struct proc *); void sleep_gdinit (struct globaldata *); int suser (struct thread *td); int suser_proc (struct proc *p); int suser_cred (struct ucred *cred, int flag); void cpu_heavy_switch (struct thread *); void cpu_lwkt_switch (struct thread *); void cpu_proc_exit (void) __dead2; void cpu_thread_exit (void) __dead2; void exit1 (int) __dead2; void cpu_fork (struct proc *, struct proc *, int); void cpu_set_fork_handler (struct proc *, void (*)(void *), void *); void cpu_set_thread_handler(struct thread *td, void (*retfunc)(void), void *func, void *arg); int fork1 (struct lwp *, int, struct proc **); void start_forked_proc (struct lwp *, struct proc *); int trace_req (struct proc *); void cpu_proc_wait (struct proc *); void cpu_thread_wait (struct thread *); int cpu_coredump (struct thread *, struct vnode *, struct ucred *); void setsugid (void); void faultin (struct proc *p); void swapin_request (void); u_int32_t procrunnable (void); #endif /* _KERNEL */ #endif /* _KERNEL || _KERNEL_STRUCTURES */ #endif /* !_SYS_PROC_H_ */