5.4 changes.

[dragonfly.git] / sys / sys / proc.h

/*-
 * 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. 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.
 */
#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 <sys/callout.h>                /* For struct callout. */
#include <sys/filedesc.h>
#include <sys/queue.h>
#include <sys/tree.h>
#include <sys/rtprio.h>                 /* For struct rtprio. */
#include <sys/signal.h>
#include <sys/lock.h>
#include <sys/upmap.h>
#ifndef _KERNEL
#include <sys/time.h>                   /* For structs itimerval, timeval. */
#endif
#include <sys/ucred.h>
#include <sys/event.h>                  /* For struct klist */
#include <sys/eventvar.h>
#include <sys/sysent.h>                 /* For struct sysentvec */
#include <sys/thread.h>
#include <sys/varsym.h>
#include <sys/resourcevar.h>
#ifdef _KERNEL
#include <sys/procctl.h>
#include <sys/globaldata.h>
#endif
#include <sys/systimer.h>
#include <sys/iosched.h>
#include <sys/usched.h>
#include <machine/proc.h>               /* Machine-dependent proc substruct. */
#include <machine/atomic.h>             /* Machine-dependent proc substruct. */
#include <sys/signalvar.h>

struct proc;
struct pgrp;
struct session;
struct lwp;
struct uidcount;
struct procglob;

LIST_HEAD(proclist, proc);
LIST_HEAD(pgrplist, pgrp);
LIST_HEAD(sesslist, session);
LIST_HEAD(lwplist, lwp);

struct lwp_rb_tree;
RB_HEAD(lwp_rb_tree, lwp);
RB_PROTOTYPE2(lwp_rb_tree, lwp, u.lwp_rbnode, rb_lwp_compare, lwpid_t);

/*
 * One structure allocated per session.
 */
struct  session {
        LIST_ENTRY(session) s_list;     /* Hash chain. */
        int     s_count;                /* Ref cnt; pgrps in session. */
        struct  procglob *s_prg;
        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_list;       /* Hash chain. */
        struct proclist 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 */
        u_int   pg_refs;
        struct lwkt_token pg_token;
        struct lock pg_lock;
};

#define PS_NOCLDWAIT    0x0001  /* No zombies if child dies */
#define PS_NOCLDSTOP    0x0002  /* No SIGCHLD when children stop. */
#define PS_CLDSIGIGN    0x0004  /* The SIGCHLD handler is SIG_IGN. */

/*
 * 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 vkernel_proc;
struct vkernel_lwp;
struct vmspace_entry;
struct ktrace_node;
struct sem_undo;

enum lwpstat {
        LSRUN = 1,
        LSSTOP = 2,
        LSSLEEP = 3,
};

enum procstat {
        SIDL = 1,
        SACTIVE = 2,
        SSTOP = 3,
        SZOMB = 4,
        SCORE = 5,
};

struct lwp {
        TAILQ_ENTRY(lwp) lwp_procq;     /* run/sleep queue. */
        union {
            RB_ENTRY(lwp)       lwp_rbnode;     /* RB tree node - lwp in proc */
            LIST_ENTRY(lwp)     lwp_reap_entry; /* reaper list */
        } u;

        struct proc     *lwp_proc;      /* Link to our proc. */
        struct vmspace  *lwp_vmspace;   /* Inherited from p_vmspace */
        struct vkernel_lwp *lwp_vkernel;/* VKernel support, lwp part */

        lwpid_t         lwp_tid;        /* Our thread id, >= 1 */

        u_int           lwp_flags;      /* LWP_*    flags */
        u_int           lwp_mpflags;    /* LWP_MP_* flags */
        enum lwpstat    lwp_stat;       /* LS* lwp status */
        int             lwp_lock;       /* lwp lock (prevent destruct) count */

        int             lwp_dupfd;      /* Sideways return value from fdopen */

        /*
         * The following two fields are marked XXX since (at least) the
         * 4.4BSD-Lite2 import.  I can only guess the reason:  It is ugly.
         * These fields are used to pass the trap code from trapsignal() to
         * postsig(), which gets called later from userret().
         *
         * The correct "fix" for these XXX is to convert our signal system
         * to use signal queues, where each signal can carry its own meta
         * data.
         */
        int             lwp_sig;        /* for core dump/debugger XXX */
        u_long          lwp_code;       /* for core dump/debugger 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_slptime;    /* Time since last blocked. */
        u_int           lwp_rebal_ticks; /* Timestamp sched on current cpu */

        int             lwp_traceflag;  /* Kernel trace points. */

        struct rusage   lwp_ru;         /* stats for this lwp */

        union usched_data lwp_usdata;   /* User scheduler specific */

#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

        struct mdproc   lwp_md;         /* Any machine-dependent fields. */

        struct thread   *lwp_thread;    /* backpointer to proc's thread */
        void            *lwp_unused01;  /* for future fields */
        struct kqueue   lwp_kqueue;     /* for select/poll */
        uint64_t        lwp_kqueue_serial; /* for select/poll */
        struct lwkt_token lwp_token;    /* per-lwp token for signal/state */
        struct spinlock lwp_spin;       /* spinlock for signal handling */
        void            *lwp_reserveds1; /* reserved for lwp_saveusp */
        void            *lwp_reserveds2; /* reserved for lwp_saveupc */
};

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 */
        struct plimit   *p_limit;       /* Process limits. */
        struct pstats   *p_stats;
        u_int           p_mqueue_cnt;   /* Count of open mqueues. */
        long            p_waitgen;      /* wait interlock allows late signal */
        struct sigacts  *p_sigacts;
#define p_sigignore     p_sigacts->ps_sigignore
#define p_sigcatch      p_sigacts->ps_sigcatch
#define p_rlimit        p_limit->pl_rlimit

        int             p_flags;        /* P_* flags. */
        enum procstat   p_stat;         /* S* process status. */
        char            p_advlock_flag; /* replaces P_ADVLOCK */
        char            p_pad1[2];

        pid_t           p_pid;          /* Process identifier. */
        pid_t           p_ppid;         /* Current parent pid */
        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. */
        struct proclist p_children;     /* Pointer to list of children. */
        struct callout  p_ithandle;     /* for scheduling p_realtimer */
        struct varsymset p_varsymset;
        struct iosched_data p_iosdata;  /* Dynamic I/O scheduling data */

        pid_t           p_oppid;        /* Save parent pid during ptrace. XXX */

        struct vmspace  *p_vmspace;     /* Current address space. */

        unsigned int    p_swtime;       /* Time swapped in or out */

        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. */
        struct nchandle p_textnch;      /* namecache handle of executable. */

        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];
        struct          sigiolst p_sigiolst;    /* list of sigio sources */
        int             p_sigparent;    /* signal to parent on exit */
        struct klist    p_klist;        /* knotes attached to this process */

        struct timeval  p_start;        /* start time for a process */

        struct rusage   p_ru;           /* stats for this proc */
        struct rusage   p_cru;          /* sum of stats for reaped children */
        void            *p_unused01;

/* The following fields are all copied upon creation in fork. */
#define p_startcopy     p_comm

        char            p_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */
        char            p_pad3;
        char            p_nice;         /* Process "nice" value. */
        char            p_pad4;
        int             p_osrel;        /* release date for binary ELF note */

        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;
        u_short         p_xstat;        /* Exit status or last stop signal */
        u_short         p_depth;        /* Used to downscale resource limits */

        int             p_ionice;
        void            *p_unused02;
/* End area that is copied on creation. */
#define p_endcopy       p_unused02
        u_short         p_acflag;       /* Accounting flags. */

        int             p_lock;         /* Prevent proc destruction */
        int             p_nthreads;     /* Number of threads in this process. */
        int             p_nstopped;     /* Number of stopped threads. */
        int             p_lasttid;      /* Last tid used. */
        struct lwp_rb_tree p_lwp_tree;  /* RB tree of LWPs for 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 */
        struct usched   *p_usched;      /* Userland scheduling control */
        struct vkernel_proc *p_vkernel; /* VKernel support, proc part */
        struct uidcount *p_uidpcpu;
        void            (*p_userret)(void);/* p: return-to-user hook */

        struct spinlock p_spin;         /* Spinlock for LWP access to proc */
        struct lwkt_token p_token;      /* Token for LWP access to proc */
        struct sem_undo *p_sem_undo;    /* Fast semaphore tracking lookup */
        void            *p_drv_priv;    /* scp linkage (for syscons) */
        void            *p_vmm;
        cpulock_t       p_vmm_cpulock;  /* count cpus in and kickout lock */
        cpumask_t       p_vmm_cpumask;  /* cpus entering or in vmm */
        struct sys_upmap *p_upmap;      /* user RO mappable per-process page */
        forkid_t        p_forkid;       /* unique forkid */
        struct sysreaper *p_reaper;     /* reaper control */
        void            *p_reserveds[3]; /* reserved for future */
};

#define lwp_wchan       lwp_thread->td_wchan
#define lwp_wmesg       lwp_thread->td_wmesg
#define p_session       p_pgrp->pg_session
#define p_pgid          p_pgrp->pg_id

/* These flags are kept in p_flags. */
#define P_UNUSED00      0x00001 /* was: 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_SYSVSEM       0x00008 /* Might have SysV semaphores */
#define P_PPWAIT        0x00010 /* Parent is waiting for child to exec/exit */
#define P_PROFIL        0x00020 /* Has started profiling */
#define P_POSTEXIT      0x00040 /* Prevent procfs from stepping after this pt */
#define P_SCMOUSE       0x00080 /* Process is held by syscons ioctl */
                                /* was: 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_MAYBETHREADED 0x00400 /* might be threaded optimization */
#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 (master exit) */
#define P_EXEC          0x04000 /* Process called exec */
#define P_CONTINUED     0x08000 /* Proc has continued from a stopped state */

#define P_LOWMEMKILL    0x00010000 /* trying to kill due to low memory */
#define P_UNUSED17      0x00020000

#define P_SWAPWAIT      0x00040000 /* Waiting for a swapin */
#define P_UNUSED19      0x00080000 /* was: Now in a zombied state */

/* Marked a kernel thread */
#define P_UNUSED20      0x00100000 /* was: on a user scheduling run queue */
#define P_UNUSED21      0x00200000 /* was: Process is really a kernel thread */
#define P_IDLESWAP      0x00400000 /* Swapout was due to idleswap, not load */

#define P_JAILED        0x01000000 /* Process is in jail */
#define P_SIGVTALRM     0x02000000 /* signal SIGVTALRM pending due to itimer */
#define P_SIGPROF       0x04000000 /* signal SIGPROF pending due to itimer */
#define P_INEXEC        0x08000000 /* Process is in execve(). */
#define P_DIDCHROOT     0x10000000 /* Did at least one chroot */
#define P_UNUSED29      0x20000000
#define P_XCPU          0x40000000 /* SIGXCPU */

#define LWP_ALTSTACK    0x0000001 /* have alternate signal stack */
#define LWP_OLDMASK     0x0000002 /* need to restore mask before pause */
#define LWP_SINTR       0x0000008 /* Sleep is interruptible. */
#define LWP_SELECT      0x0000010 /* Selecting; wakeup/waiting danger. */
#define LWP_UNUSED20    0x0000020
#define LWP_UNUSED40    0x0000040
#define LWP_UNUSED80    0x0000080
#define LWP_PASSIVE_ACQ 0x0000100 /* Passive acquire cpu (see kern_switch) */
#define LWP_PAGING      0x0000200 /* Currently in vm_fault */

/*
 * LWP_MP_WSTOP: When set the thread will stop prior to return to userland
 *            and has been counted in the process stop-threads-count, but
 *            may still be running in kernel-land.
 *
 * LWP_MP_WEXIT: When set the thread has been asked to exit and will not return
 *            to userland.  p_nthreads will not be decremented until the
 *            thread has actually exited.
 */
#define LWP_MP_ONRUNQ   0x0000001 /* on a user scheduling run queue */
#define LWP_MP_WEXIT    0x0000002 /* working on exiting (lwpuserret()) */
#define LWP_MP_WSTOP    0x0000004 /* working on stopping */
#define LWP_MP_ULOAD    0x0000008 /* uload accounting for current cpu */
#define LWP_MP_RRFORCE  0x0000010 /* forced resched due to rrcount */
#define LWP_MP_VNLRU    0x0000020 /* check excessive vnode allocations (lwpuserret()) */

#define LWP_MP_URETMASK (LWP_MP_WEXIT | LWP_MP_VNLRU)

#define FIRST_LWP_IN_PROC(p)            RB_FIRST(lwp_rb_tree, &(p)->p_lwp_tree)
#define FOREACH_LWP_IN_PROC(lp, p)      \
        RB_FOREACH(lp, lwp_rb_tree, &(p)->p_lwp_tree)
#define ONLY_LWP_IN_PROC(p)             _only_lwp_in_proc(p, __func__)

struct procglob {
        struct lwkt_token proc_token;
        struct proclist allproc;        /* locked by proc_token */
        struct pgrplist allpgrp;        /* locked by proc_token */
        struct sesslist allsess;        /* locked by proc_token */
        void    *pad01;                 /* pad for clarity */
} __cachealign;

#ifdef _KERNEL
static inline struct lwp *
_only_lwp_in_proc(struct proc *p, const char *caller)
{
        if (p->p_nthreads != 1) {
                panic("%s: proc %p (pid %d cmd %s) has more than one thread",
                    caller, p, p->p_pid, p->p_comm);
        }
        return RB_ROOT(&p->p_lwp_tree);
}
#endif

/*
 * We use process IDs <= PID_MAX.  NO_PID must also fit in a pid_t and
 * is used to represent "no process group".
 */
#define PID_MAX         999999
#define NO_PID          0x7FFFFFFF

#define SESS_LEADER(p)  ((p)->p_session->s_leader == (p))

#ifdef _KERNEL

#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_SESSION);
MALLOC_DECLARE(M_PROC);
MALLOC_DECLARE(M_LWP);
MALLOC_DECLARE(M_SUBPROC);
MALLOC_DECLARE(M_PARGS);
#endif

/* for priv_check_cred() */
#define NULL_CRED_OKAY  0x2

/*
 * Handy macro to determine if p1 can mangle p2.
 *
 * Must be spin-safe.
 */
#define PRISON_CHECK(cr1, cr2) \
        ((!(cr1)->cr_prison) || (cr1)->cr_prison == (cr2)->cr_prison)

/*
 * 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 in memory, don't destruct, used by ktrace, procfs, sigio,
 * and signaling code (e.g. ksignal()).
 *
 * MPSAFE
 */
#define PHOLD(p)        phold((p))
#define PRELE(p)        prele((p))
#define PHOLDZOMB(p)    pholdzomb((p))
#define PRELEZOMB(p)    prelezomb((p))
#define PSTALL(p, msg, n) \
        do { if ((p)->p_lock > (n)) pstall((p), (msg), (n)); } while (0)

#define STOPLWP(p, lp)                                          \
        (((p)->p_stat == SSTOP || (p)->p_stat == SCORE) &&      \
         ((lp)->lwp_mpflags & LWP_MP_WEXIT) == 0)

/*
 * Hold lwp in memory, don't destruct, normally for ptrace/procfs work
 * atomic ops because they can occur from an IPI.
 * MPSAFE
 */
#define LWPHOLD(lp)     atomic_add_int(&(lp)->lwp_lock, 1)
#define LWPRELE(lp)     atomic_add_int(&(lp)->lwp_lock, -1)

extern struct proc proc0;               /* Process slot for swapper. */
extern struct lwp lwp0;                 /* LWP slot for swapper. */
extern struct thread thread0;           /* Thread slot for swapper. */
extern int nprocs, maxproc;             /* Current and max number of procs. */
extern int maxprocperuid;               /* Max procs per uid. */

extern struct proc *initproc;           /* Process slot for init */
extern struct thread *pagethread;
extern struct thread *emergpager;
extern struct thread *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 w/ref */
struct proc *pfindn (pid_t);    /* Find process by id wo/ref */
struct pgrp *pgfind (pid_t);    /* Find process group by id w/ref */
struct proc *zpfind (pid_t);    /* Find zombie process by id w/ref */
void pgref (struct pgrp *);     /* Ref pgrp preventing disposal */
void pgrel (struct pgrp *);     /* Deref pgrp & dispose on 1->0 trans */

struct globaldata;
struct lwp_params;

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,
                        int segmented);
void    alllwp_scan(int (*callback)(struct lwp *, void *), void *data,
                        int segmented);
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    procinit (void);
void    procinsertinit(struct proc *p);
void    sessinsertinit(struct session *sess);
void    pgrpinsertinit(struct pgrp *pg);
void    relscurproc(struct proc *curp);
int     p_trespass (struct ucred *cr1, struct ucred *cr2);
void    setrunnable (struct lwp *);
void    proc_stop (struct proc *, int);
void    proc_unstop (struct proc *, int);
void    sleep_early_gdinit (struct globaldata *);
void    sleep_gdinit (struct globaldata *);
thread_t cpu_heavy_switch (struct thread *);
thread_t cpu_lwkt_switch (struct thread *);

void    cpu_lwp_exit (void) __dead2;
void    cpu_thread_exit (void) __dead2;
void    lwp_exit (int masterexit, void *waddr) __dead2;
void    lwp_dispose (struct lwp *);
int     killalllwps (int);
void    exit1 (int) __dead2;
void    cpu_fork (struct lwp *, struct lwp *, int);
int     cpu_prepare_lwp(struct lwp *, struct lwp_params *);
void    cpu_set_fork_handler (struct lwp *, void (*)(void *, struct trapframe *), 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_thread_wait (struct thread *);
void    setsugid (void);
void    faultin (struct proc *p);
void    swapin_request (void);
void    phold (struct proc *);
void    prele (struct proc *);
int     pholdzomb (struct proc *);
void    prelezomb (struct proc *);
void    pstall (struct proc *, const char *, int);
void    lwpuserret(struct lwp *);
void    lwpkthreaddeferred(void);
void    proc_usermap(struct proc *p, int invfork);
void    proc_userunmap(struct proc *p);
void    reaper_hold(struct sysreaper *reap);
void    reaper_drop(struct sysreaper *reap);
int     reaper_sigtest(struct proc *sender, struct proc *target, int reaper_ok);
struct sysreaper *reaper_exit(struct proc *p);
void    reaper_init(struct proc *p, struct sysreaper *reap);
struct proc *reaper_get(struct sysreaper *reap);

u_int32_t       procrunnable (void);

#endif  /* _KERNEL */

#endif  /* _KERNEL || _KERNEL_STRUCTURES */
#endif  /* !_SYS_PROC_H_ */