a136efe9b6
pmap_swapin_proc/pmap_swapout_proc functions from the MD pmap code and use a single equivalent MI version. There are other cleanups needed still. While here, use the UMA zone hooks to keep a cache of preinitialized proc structures handy, just like the thread system does. This eliminates one dependency on 'struct proc' being persistent even after being freed. There are some comments about things that can be factored out into ctor/dtor functions if it is worth it. For now they are mostly just doing statistics to get a feel of how it is working.
1247 lines
29 KiB
C
1247 lines
29 KiB
C
/*
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* Copyright (c) 1982, 1986, 1989, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)kern_proc.c 8.7 (Berkeley) 2/14/95
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* $FreeBSD$
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*/
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#include "opt_ktrace.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/sysproto.h>
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#include <sys/kse.h>
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#include <sys/sysctl.h>
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#include <sys/filedesc.h>
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#include <sys/tty.h>
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#include <sys/signalvar.h>
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#include <sys/sx.h>
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#include <sys/user.h>
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#include <sys/jail.h>
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#ifdef KTRACE
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#include <sys/uio.h>
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#include <sys/ktrace.h>
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#endif
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <vm/uma.h>
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#include <machine/critical.h>
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MALLOC_DEFINE(M_PGRP, "pgrp", "process group header");
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MALLOC_DEFINE(M_SESSION, "session", "session header");
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static MALLOC_DEFINE(M_PROC, "proc", "Proc structures");
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MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures");
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static struct proc *dopfind(register pid_t);
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static void doenterpgrp(struct proc *, struct pgrp *);
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static void pgdelete(struct pgrp *);
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static void orphanpg(struct pgrp *pg);
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static void proc_ctor(void *mem, int size, void *arg);
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static void proc_dtor(void *mem, int size, void *arg);
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static void proc_init(void *mem, int size);
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static void proc_fini(void *mem, int size);
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/*
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* Other process lists
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*/
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struct pidhashhead *pidhashtbl;
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u_long pidhash;
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struct pgrphashhead *pgrphashtbl;
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u_long pgrphash;
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struct proclist allproc;
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struct proclist zombproc;
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struct sx allproc_lock;
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struct sx proctree_lock;
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struct mtx pargs_ref_lock;
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uma_zone_t proc_zone;
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uma_zone_t ithread_zone;
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static int active_procs;
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static int cached_procs;
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static int allocated_procs;
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#define RANGEOF(type, start, end) (offsetof(type, end) - offsetof(type, start))
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CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE);
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/*
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* Initialize global process hashing structures.
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*/
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void
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procinit()
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{
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sx_init(&allproc_lock, "allproc");
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sx_init(&proctree_lock, "proctree");
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mtx_init(&pargs_ref_lock, "struct pargs.ref", NULL, MTX_DEF);
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LIST_INIT(&allproc);
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LIST_INIT(&zombproc);
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pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash);
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pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash);
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proc_zone = uma_zcreate("PROC", sizeof (struct proc),
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proc_ctor, proc_dtor, proc_init, proc_fini,
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UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
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uihashinit();
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}
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/*
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* Prepare a proc for use.
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*/
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static void
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proc_ctor(void *mem, int size, void *arg)
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{
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struct proc *p;
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KASSERT((size == sizeof(struct proc)),
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("size mismatch: %d != %d\n", size, (int)sizeof(struct proc)));
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p = (struct proc *)mem;
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#if 0
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/*
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* Maybe move these from process creation, but maybe not.
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* Moving them here takes them away from their "natural" place
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* in the fork process.
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*/
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bzero(&p->p_startzero,
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(unsigned) RANGEOF(struct proc, p_startzero, p_endzero));
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p->p_state = PRS_NEW;
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mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK);
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LIST_INIT(&p->p_children);
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callout_init(&p->p_itcallout, 0);
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#endif
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cached_procs--;
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active_procs++;
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}
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/*
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* Reclaim a proc after use.
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*/
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static void
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proc_dtor(void *mem, int size, void *arg)
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{
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struct proc *p;
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KASSERT((size == sizeof(struct proc)),
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("size mismatch: %d != %d\n", size, (int)sizeof(struct proc)));
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p = (struct proc *)mem;
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/* INVARIANTS checks go here */
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#if 0 /* See comment in proc_ctor about seperating things */
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mtx_destroy(&p->p_mtx);
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#endif
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active_procs--;
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cached_procs++;
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}
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/*
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* Initialize type-stable parts of a proc (when newly created).
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*/
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static void
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proc_init(void *mem, int size)
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{
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struct proc *p;
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KASSERT((size == sizeof(struct proc)),
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("size mismatch: %d != %d\n", size, (int)sizeof(struct proc)));
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p = (struct proc *)mem;
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vm_proc_new(p);
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cached_procs++;
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allocated_procs++;
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}
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/*
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* Tear down type-stable parts of a proc (just before being discarded)
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*/
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static void
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proc_fini(void *mem, int size)
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{
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struct proc *p;
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KASSERT((size == sizeof(struct proc)),
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("size mismatch: %d != %d\n", size, (int)sizeof(struct proc)));
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p = (struct proc *)mem;
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vm_proc_dispose(p);
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cached_procs--;
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allocated_procs--;
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}
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/*
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* KSE is linked onto the idle queue.
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*/
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void
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kse_link(struct kse *ke, struct ksegrp *kg)
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{
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struct proc *p = kg->kg_proc;
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KASSERT((ke->ke_state != KES_ONRUNQ), ("linking suspect kse on run queue"));
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TAILQ_INSERT_HEAD(&kg->kg_kseq, ke, ke_kglist);
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kg->kg_kses++;
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KASSERT((ke->ke_state != KES_IDLE), ("already on idle queue"));
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ke->ke_state = KES_IDLE;
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TAILQ_INSERT_HEAD(&kg->kg_iq, ke, ke_kgrlist);
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kg->kg_idle_kses++;
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ke->ke_proc = p;
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ke->ke_ksegrp = kg;
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ke->ke_thread = NULL;
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ke->ke_oncpu = NOCPU;
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}
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void
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ksegrp_link(struct ksegrp *kg, struct proc *p)
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{
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TAILQ_INIT(&kg->kg_threads);
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TAILQ_INIT(&kg->kg_runq); /* links with td_runq */
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TAILQ_INIT(&kg->kg_slpq); /* links with td_runq */
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TAILQ_INIT(&kg->kg_kseq); /* all kses in ksegrp */
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TAILQ_INIT(&kg->kg_iq); /* all kses in ksegrp */
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kg->kg_proc = p;
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/* the following counters are in the -zero- section and may not need clearing */
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kg->kg_numthreads = 0;
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kg->kg_runnable = 0;
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kg->kg_kses = 0;
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kg->kg_idle_kses = 0;
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kg->kg_runq_kses = 0; /* XXXKSE change name */
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/* link it in now that it's consitant */
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p->p_numksegrps++;
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TAILQ_INSERT_HEAD(&p->p_ksegrps, kg, kg_ksegrp);
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}
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/*
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* for a newly created process,
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* link up a the structure and its initial threads etc.
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*/
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void
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proc_linkup(struct proc *p, struct ksegrp *kg,
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struct kse *ke, struct thread *td)
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{
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TAILQ_INIT(&p->p_ksegrps); /* all ksegrps in proc */
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TAILQ_INIT(&p->p_threads); /* all threads in proc */
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TAILQ_INIT(&p->p_suspended); /* Threads suspended */
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ksegrp_link(kg, p);
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kse_link(ke, kg);
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thread_link(td, kg);
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}
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int
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thread_wakeup(struct thread *td, struct thread_wakeup_args *uap)
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{
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return(ENOSYS);
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}
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int
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kse_exit(struct thread *td, struct kse_exit_args *uap)
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{
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return(ENOSYS);
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}
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int
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kse_yield(struct thread *td, struct kse_yield_args *uap)
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{
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PROC_LOCK(td->td_proc);
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mtx_lock_spin(&sched_lock);
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thread_exit();
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/* NOTREACHED */
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return(0);
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}
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int kse_wakeup(struct thread *td, struct kse_wakeup_args *uap)
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{
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return(ENOSYS);
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}
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/*
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* No new KSEG: first call: use current KSE, don't schedule an upcall
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* All other situations, do alloate a new KSE and schedule an upcall on it.
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*/
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/* struct kse_new_args {
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struct kse_mailbox *mbx;
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int new_grp_flag;
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}; */
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int
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kse_new(struct thread *td, struct kse_new_args *uap)
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{
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struct kse *newkse;
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struct proc *p;
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struct kse_mailbox mbx;
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int err;
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p = td->td_proc;
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if ((err = copyin(uap->mbx, &mbx, sizeof(mbx))))
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return (err);
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PROC_LOCK(p);
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/*
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* If we have no KSE mode set, just set it, and skip KSE and KSEGRP
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* creation. You cannot request a new group with the first one as
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* you are effectively getting one. Instead, go directly to saving
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* the upcall info.
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*/
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if ((td->td_proc->p_flag & P_KSES) || (uap->new_grp_flag)) {
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return (EINVAL); /* XXX */
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/*
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* If newgroup then create the new group.
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* Check we have the resources for this.
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*/
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/* Copy lots of fields from the current KSEGRP. */
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/* Create the new KSE */
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/* Copy lots of fields from the current KSE. */
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} else {
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/*
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* We are switching to KSEs so just
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* use the preallocated ones for this call.
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* XXXKSE if we have to initialise any fields for KSE
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* mode operation, do it here.
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*/
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newkse = td->td_kse;
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}
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/*
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* Fill out the KSE-mode specific fields of the new kse.
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*/
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PROC_UNLOCK(p);
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mtx_lock_spin(&sched_lock);
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mi_switch(); /* Save current registers to PCB. */
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mtx_unlock_spin(&sched_lock);
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newkse->ke_upcall = mbx.kmbx_upcall;
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newkse->ke_stackbase = mbx.kmbx_stackbase;
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newkse->ke_stacksize = mbx.kmbx_stacksize;
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newkse->ke_mailbox = uap->mbx;
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cpu_save_upcall(td, newkse);
|
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/* Note that we are the returning syscall */
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td->td_retval[0] = 0;
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td->td_retval[1] = 0;
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if ((td->td_proc->p_flag & P_KSES) || (uap->new_grp_flag)) {
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thread_schedule_upcall(td, newkse);
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} else {
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/*
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* Don't set this until we are truely ready, because
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* things will start acting differently. Return to the
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* calling code for the first time. Assuming we set up
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* the mailboxes right, all syscalls after this will be
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* asynchronous.
|
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*/
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td->td_proc->p_flag |= P_KSES;
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}
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return (0);
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}
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|
|
/*
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* Is p an inferior of the current process?
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*/
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int
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inferior(p)
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register struct proc *p;
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{
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|
|
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sx_assert(&proctree_lock, SX_LOCKED);
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for (; p != curproc; p = p->p_pptr)
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if (p->p_pid == 0)
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return (0);
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return (1);
|
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}
|
|
|
|
/*
|
|
* Locate a process by number
|
|
*/
|
|
struct proc *
|
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pfind(pid)
|
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register pid_t pid;
|
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{
|
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register struct proc *p;
|
|
|
|
sx_slock(&allproc_lock);
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p = dopfind(pid);
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sx_sunlock(&allproc_lock);
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return (p);
|
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}
|
|
|
|
static struct proc *
|
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dopfind(pid)
|
|
register pid_t pid;
|
|
{
|
|
register struct proc *p;
|
|
|
|
sx_assert(&allproc_lock, SX_LOCKED);
|
|
|
|
LIST_FOREACH(p, PIDHASH(pid), p_hash)
|
|
if (p->p_pid == pid) {
|
|
PROC_LOCK(p);
|
|
break;
|
|
}
|
|
return (p);
|
|
}
|
|
|
|
/*
|
|
* Locate a process group by number.
|
|
* The caller must hold proctree_lock.
|
|
*/
|
|
struct pgrp *
|
|
pgfind(pgid)
|
|
register pid_t pgid;
|
|
{
|
|
register struct pgrp *pgrp;
|
|
|
|
sx_assert(&proctree_lock, SX_LOCKED);
|
|
|
|
LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) {
|
|
if (pgrp->pg_id == pgid) {
|
|
PGRP_LOCK(pgrp);
|
|
return (pgrp);
|
|
}
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Create a new process group.
|
|
* pgid must be equal to the pid of p.
|
|
* Begin a new session if required.
|
|
*/
|
|
int
|
|
enterpgrp(p, pgid, pgrp, sess)
|
|
register struct proc *p;
|
|
pid_t pgid;
|
|
struct pgrp *pgrp;
|
|
struct session *sess;
|
|
{
|
|
struct pgrp *pgrp2;
|
|
|
|
sx_assert(&proctree_lock, SX_XLOCKED);
|
|
|
|
KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL"));
|
|
KASSERT(p->p_pid == pgid,
|
|
("enterpgrp: new pgrp and pid != pgid"));
|
|
|
|
pgrp2 = pgfind(pgid);
|
|
|
|
KASSERT(pgrp2 == NULL,
|
|
("enterpgrp: pgrp with pgid exists"));
|
|
KASSERT(!SESS_LEADER(p),
|
|
("enterpgrp: session leader attempted setpgrp"));
|
|
|
|
mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
|
|
|
|
if (sess != NULL) {
|
|
/*
|
|
* new session
|
|
*/
|
|
mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF);
|
|
PROC_LOCK(p);
|
|
p->p_flag &= ~P_CONTROLT;
|
|
PROC_UNLOCK(p);
|
|
PGRP_LOCK(pgrp);
|
|
sess->s_leader = p;
|
|
sess->s_sid = p->p_pid;
|
|
sess->s_count = 1;
|
|
sess->s_ttyvp = NULL;
|
|
sess->s_ttyp = NULL;
|
|
bcopy(p->p_session->s_login, sess->s_login,
|
|
sizeof(sess->s_login));
|
|
pgrp->pg_session = sess;
|
|
KASSERT(p == curproc,
|
|
("enterpgrp: mksession and p != curproc"));
|
|
} else {
|
|
pgrp->pg_session = p->p_session;
|
|
SESS_LOCK(pgrp->pg_session);
|
|
pgrp->pg_session->s_count++;
|
|
SESS_UNLOCK(pgrp->pg_session);
|
|
PGRP_LOCK(pgrp);
|
|
}
|
|
pgrp->pg_id = pgid;
|
|
LIST_INIT(&pgrp->pg_members);
|
|
|
|
/*
|
|
* As we have an exclusive lock of proctree_lock,
|
|
* this should not deadlock.
|
|
*/
|
|
LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
|
|
pgrp->pg_jobc = 0;
|
|
SLIST_INIT(&pgrp->pg_sigiolst);
|
|
PGRP_UNLOCK(pgrp);
|
|
|
|
doenterpgrp(p, pgrp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Move p to an existing process group
|
|
*/
|
|
int
|
|
enterthispgrp(p, pgrp)
|
|
register struct proc *p;
|
|
struct pgrp *pgrp;
|
|
{
|
|
|
|
sx_assert(&proctree_lock, SX_XLOCKED);
|
|
PROC_LOCK_ASSERT(p, MA_NOTOWNED);
|
|
PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
|
|
PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
|
|
SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
|
|
KASSERT(pgrp->pg_session == p->p_session,
|
|
("%s: pgrp's session %p, p->p_session %p.\n",
|
|
__func__,
|
|
pgrp->pg_session,
|
|
p->p_session));
|
|
KASSERT(pgrp != p->p_pgrp,
|
|
("%s: p belongs to pgrp.", __func__));
|
|
|
|
doenterpgrp(p, pgrp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Move p to a process group
|
|
*/
|
|
static void
|
|
doenterpgrp(p, pgrp)
|
|
struct proc *p;
|
|
struct pgrp *pgrp;
|
|
{
|
|
struct pgrp *savepgrp;
|
|
|
|
sx_assert(&proctree_lock, SX_XLOCKED);
|
|
PROC_LOCK_ASSERT(p, MA_NOTOWNED);
|
|
PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
|
|
PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
|
|
SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
|
|
|
|
savepgrp = p->p_pgrp;
|
|
|
|
/*
|
|
* Adjust eligibility of affected pgrps to participate in job control.
|
|
* Increment eligibility counts before decrementing, otherwise we
|
|
* could reach 0 spuriously during the first call.
|
|
*/
|
|
fixjobc(p, pgrp, 1);
|
|
fixjobc(p, p->p_pgrp, 0);
|
|
|
|
PGRP_LOCK(pgrp);
|
|
PGRP_LOCK(savepgrp);
|
|
PROC_LOCK(p);
|
|
LIST_REMOVE(p, p_pglist);
|
|
p->p_pgrp = pgrp;
|
|
PROC_UNLOCK(p);
|
|
LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist);
|
|
PGRP_UNLOCK(savepgrp);
|
|
PGRP_UNLOCK(pgrp);
|
|
if (LIST_EMPTY(&savepgrp->pg_members))
|
|
pgdelete(savepgrp);
|
|
}
|
|
|
|
/*
|
|
* remove process from process group
|
|
*/
|
|
int
|
|
leavepgrp(p)
|
|
register struct proc *p;
|
|
{
|
|
struct pgrp *savepgrp;
|
|
|
|
sx_assert(&proctree_lock, SX_XLOCKED);
|
|
savepgrp = p->p_pgrp;
|
|
PGRP_LOCK(savepgrp);
|
|
PROC_LOCK(p);
|
|
LIST_REMOVE(p, p_pglist);
|
|
p->p_pgrp = NULL;
|
|
PROC_UNLOCK(p);
|
|
PGRP_UNLOCK(savepgrp);
|
|
if (LIST_EMPTY(&savepgrp->pg_members))
|
|
pgdelete(savepgrp);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* delete a process group
|
|
*/
|
|
static void
|
|
pgdelete(pgrp)
|
|
register struct pgrp *pgrp;
|
|
{
|
|
struct session *savesess;
|
|
|
|
sx_assert(&proctree_lock, SX_XLOCKED);
|
|
PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
|
|
SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
|
|
|
|
/*
|
|
* Reset any sigio structures pointing to us as a result of
|
|
* F_SETOWN with our pgid.
|
|
*/
|
|
funsetownlst(&pgrp->pg_sigiolst);
|
|
|
|
PGRP_LOCK(pgrp);
|
|
if (pgrp->pg_session->s_ttyp != NULL &&
|
|
pgrp->pg_session->s_ttyp->t_pgrp == pgrp)
|
|
pgrp->pg_session->s_ttyp->t_pgrp = NULL;
|
|
LIST_REMOVE(pgrp, pg_hash);
|
|
savesess = pgrp->pg_session;
|
|
SESS_LOCK(savesess);
|
|
savesess->s_count--;
|
|
SESS_UNLOCK(savesess);
|
|
PGRP_UNLOCK(pgrp);
|
|
if (savesess->s_count == 0) {
|
|
mtx_destroy(&savesess->s_mtx);
|
|
FREE(pgrp->pg_session, M_SESSION);
|
|
}
|
|
mtx_destroy(&pgrp->pg_mtx);
|
|
FREE(pgrp, M_PGRP);
|
|
}
|
|
|
|
/*
|
|
* Adjust pgrp jobc counters when specified process changes process group.
|
|
* We count the number of processes in each process group that "qualify"
|
|
* the group for terminal job control (those with a parent in a different
|
|
* process group of the same session). If that count reaches zero, the
|
|
* process group becomes orphaned. Check both the specified process'
|
|
* process group and that of its children.
|
|
* entering == 0 => p is leaving specified group.
|
|
* entering == 1 => p is entering specified group.
|
|
*/
|
|
void
|
|
fixjobc(p, pgrp, entering)
|
|
register struct proc *p;
|
|
register struct pgrp *pgrp;
|
|
int entering;
|
|
{
|
|
register struct pgrp *hispgrp;
|
|
register struct session *mysession;
|
|
|
|
sx_assert(&proctree_lock, SX_LOCKED);
|
|
PROC_LOCK_ASSERT(p, MA_NOTOWNED);
|
|
PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
|
|
SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
|
|
|
|
/*
|
|
* Check p's parent to see whether p qualifies its own process
|
|
* group; if so, adjust count for p's process group.
|
|
*/
|
|
mysession = pgrp->pg_session;
|
|
if ((hispgrp = p->p_pptr->p_pgrp) != pgrp &&
|
|
hispgrp->pg_session == mysession) {
|
|
PGRP_LOCK(pgrp);
|
|
if (entering)
|
|
pgrp->pg_jobc++;
|
|
else {
|
|
--pgrp->pg_jobc;
|
|
if (pgrp->pg_jobc == 0)
|
|
orphanpg(pgrp);
|
|
}
|
|
PGRP_UNLOCK(pgrp);
|
|
}
|
|
|
|
/*
|
|
* Check this process' children to see whether they qualify
|
|
* their process groups; if so, adjust counts for children's
|
|
* process groups.
|
|
*/
|
|
LIST_FOREACH(p, &p->p_children, p_sibling) {
|
|
if ((hispgrp = p->p_pgrp) != pgrp &&
|
|
hispgrp->pg_session == mysession &&
|
|
p->p_state != PRS_ZOMBIE) {
|
|
PGRP_LOCK(hispgrp);
|
|
if (entering)
|
|
hispgrp->pg_jobc++;
|
|
else {
|
|
--hispgrp->pg_jobc;
|
|
if (hispgrp->pg_jobc == 0)
|
|
orphanpg(hispgrp);
|
|
}
|
|
PGRP_UNLOCK(hispgrp);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* A process group has become orphaned;
|
|
* if there are any stopped processes in the group,
|
|
* hang-up all process in that group.
|
|
*/
|
|
static void
|
|
orphanpg(pg)
|
|
struct pgrp *pg;
|
|
{
|
|
register struct proc *p;
|
|
|
|
PGRP_LOCK_ASSERT(pg, MA_OWNED);
|
|
|
|
mtx_lock_spin(&sched_lock);
|
|
LIST_FOREACH(p, &pg->pg_members, p_pglist) {
|
|
if (P_SHOULDSTOP(p)) {
|
|
mtx_unlock_spin(&sched_lock);
|
|
LIST_FOREACH(p, &pg->pg_members, p_pglist) {
|
|
PROC_LOCK(p);
|
|
psignal(p, SIGHUP);
|
|
psignal(p, SIGCONT);
|
|
PROC_UNLOCK(p);
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
mtx_unlock_spin(&sched_lock);
|
|
}
|
|
|
|
#include "opt_ddb.h"
|
|
#ifdef DDB
|
|
#include <ddb/ddb.h>
|
|
|
|
DB_SHOW_COMMAND(pgrpdump, pgrpdump)
|
|
{
|
|
register struct pgrp *pgrp;
|
|
register struct proc *p;
|
|
register int i;
|
|
|
|
for (i = 0; i <= pgrphash; i++) {
|
|
if (!LIST_EMPTY(&pgrphashtbl[i])) {
|
|
printf("\tindx %d\n", i);
|
|
LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) {
|
|
printf(
|
|
"\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n",
|
|
(void *)pgrp, (long)pgrp->pg_id,
|
|
(void *)pgrp->pg_session,
|
|
pgrp->pg_session->s_count,
|
|
(void *)LIST_FIRST(&pgrp->pg_members));
|
|
LIST_FOREACH(p, &pgrp->pg_members, p_pglist) {
|
|
printf("\t\tpid %ld addr %p pgrp %p\n",
|
|
(long)p->p_pid, (void *)p,
|
|
(void *)p->p_pgrp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif /* DDB */
|
|
|
|
/*
|
|
* Fill in an kinfo_proc structure for the specified process.
|
|
* Must be called with the target process locked.
|
|
*/
|
|
void
|
|
fill_kinfo_proc(p, kp)
|
|
struct proc *p;
|
|
struct kinfo_proc *kp;
|
|
{
|
|
struct thread *td;
|
|
struct tty *tp;
|
|
struct session *sp;
|
|
struct timeval tv;
|
|
|
|
bzero(kp, sizeof(*kp));
|
|
|
|
kp->ki_structsize = sizeof(*kp);
|
|
kp->ki_paddr = p;
|
|
PROC_LOCK_ASSERT(p, MA_OWNED);
|
|
kp->ki_addr =/* p->p_addr; */0; /* XXXKSE */
|
|
kp->ki_args = p->p_args;
|
|
kp->ki_textvp = p->p_textvp;
|
|
#ifdef KTRACE
|
|
kp->ki_tracep = p->p_tracep;
|
|
mtx_lock(&ktrace_mtx);
|
|
kp->ki_traceflag = p->p_traceflag;
|
|
mtx_unlock(&ktrace_mtx);
|
|
#endif
|
|
kp->ki_fd = p->p_fd;
|
|
kp->ki_vmspace = p->p_vmspace;
|
|
if (p->p_ucred) {
|
|
kp->ki_uid = p->p_ucred->cr_uid;
|
|
kp->ki_ruid = p->p_ucred->cr_ruid;
|
|
kp->ki_svuid = p->p_ucred->cr_svuid;
|
|
/* XXX bde doesn't like KI_NGROUPS */
|
|
kp->ki_ngroups = min(p->p_ucred->cr_ngroups, KI_NGROUPS);
|
|
bcopy(p->p_ucred->cr_groups, kp->ki_groups,
|
|
kp->ki_ngroups * sizeof(gid_t));
|
|
kp->ki_rgid = p->p_ucred->cr_rgid;
|
|
kp->ki_svgid = p->p_ucred->cr_svgid;
|
|
}
|
|
if (p->p_procsig) {
|
|
kp->ki_sigignore = p->p_procsig->ps_sigignore;
|
|
kp->ki_sigcatch = p->p_procsig->ps_sigcatch;
|
|
}
|
|
mtx_lock_spin(&sched_lock);
|
|
if (p->p_state != PRS_NEW &&
|
|
p->p_state != PRS_ZOMBIE &&
|
|
p->p_vmspace != NULL) {
|
|
struct vmspace *vm = p->p_vmspace;
|
|
|
|
kp->ki_size = vm->vm_map.size;
|
|
kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/
|
|
if (p->p_sflag & PS_INMEM)
|
|
kp->ki_rssize += UAREA_PAGES;
|
|
FOREACH_THREAD_IN_PROC(p, td) /* XXXKSE: thread swapout check */
|
|
kp->ki_rssize += KSTACK_PAGES;
|
|
kp->ki_swrss = vm->vm_swrss;
|
|
kp->ki_tsize = vm->vm_tsize;
|
|
kp->ki_dsize = vm->vm_dsize;
|
|
kp->ki_ssize = vm->vm_ssize;
|
|
}
|
|
if ((p->p_sflag & PS_INMEM) && p->p_stats) {
|
|
kp->ki_start = p->p_stats->p_start;
|
|
kp->ki_rusage = p->p_stats->p_ru;
|
|
kp->ki_childtime.tv_sec = p->p_stats->p_cru.ru_utime.tv_sec +
|
|
p->p_stats->p_cru.ru_stime.tv_sec;
|
|
kp->ki_childtime.tv_usec = p->p_stats->p_cru.ru_utime.tv_usec +
|
|
p->p_stats->p_cru.ru_stime.tv_usec;
|
|
}
|
|
if (p->p_state != PRS_ZOMBIE) {
|
|
td = FIRST_THREAD_IN_PROC(p);
|
|
if (!(p->p_flag & P_KSES)) {
|
|
if (td->td_wmesg != NULL) {
|
|
strncpy(kp->ki_wmesg, td->td_wmesg,
|
|
sizeof(kp->ki_wmesg) - 1);
|
|
}
|
|
if (td->td_state == TDS_MTX) {
|
|
kp->ki_kiflag |= KI_MTXBLOCK;
|
|
strncpy(kp->ki_mtxname, td->td_mtxname,
|
|
sizeof(kp->ki_mtxname) - 1);
|
|
}
|
|
}
|
|
|
|
if (p->p_state == PRS_NORMAL) { /* XXXKSE very aproximate */
|
|
if ((td->td_state == TDS_RUNQ) ||
|
|
(td->td_state == TDS_RUNNING)) {
|
|
kp->ki_stat = SRUN;
|
|
} else if (td->td_state == TDS_SLP) {
|
|
kp->ki_stat = SSLEEP;
|
|
} else if (P_SHOULDSTOP(p)) {
|
|
kp->ki_stat = SSTOP;
|
|
} else if (td->td_state == TDS_MTX) {
|
|
kp->ki_stat = SMTX;
|
|
} else {
|
|
kp->ki_stat = SWAIT;
|
|
}
|
|
} else {
|
|
kp->ki_stat = SIDL;
|
|
}
|
|
|
|
kp->ki_sflag = p->p_sflag;
|
|
kp->ki_swtime = p->p_swtime;
|
|
kp->ki_pid = p->p_pid;
|
|
/* vvv XXXKSE */
|
|
if (!(p->p_flag & P_KSES)) {
|
|
bintime2timeval(&p->p_runtime, &tv);
|
|
kp->ki_runtime = tv.tv_sec * (u_int64_t)1000000 + tv.tv_usec;
|
|
kp->ki_pctcpu = p->p_kse.ke_pctcpu;
|
|
kp->ki_estcpu = p->p_ksegrp.kg_estcpu;
|
|
kp->ki_slptime = p->p_ksegrp.kg_slptime;
|
|
kp->ki_wchan = td->td_wchan;
|
|
kp->ki_pri.pri_level = td->td_priority;
|
|
kp->ki_pri.pri_user = p->p_ksegrp.kg_user_pri;
|
|
kp->ki_pri.pri_class = p->p_ksegrp.kg_pri_class;
|
|
kp->ki_pri.pri_native = td->td_base_pri;
|
|
kp->ki_nice = p->p_ksegrp.kg_nice;
|
|
kp->ki_rqindex = p->p_kse.ke_rqindex;
|
|
kp->ki_oncpu = p->p_kse.ke_oncpu;
|
|
kp->ki_lastcpu = td->td_lastcpu;
|
|
kp->ki_tdflags = td->td_flags;
|
|
kp->ki_pcb = td->td_pcb;
|
|
kp->ki_kstack = (void *)td->td_kstack;
|
|
} else {
|
|
kp->ki_oncpu = -1;
|
|
kp->ki_lastcpu = -1;
|
|
kp->ki_tdflags = -1;
|
|
/* All the reast are 0 */
|
|
}
|
|
} else {
|
|
kp->ki_stat = SZOMB;
|
|
}
|
|
/* ^^^ XXXKSE */
|
|
mtx_unlock_spin(&sched_lock);
|
|
sp = NULL;
|
|
tp = NULL;
|
|
if (p->p_pgrp) {
|
|
kp->ki_pgid = p->p_pgrp->pg_id;
|
|
kp->ki_jobc = p->p_pgrp->pg_jobc;
|
|
sp = p->p_pgrp->pg_session;
|
|
|
|
if (sp != NULL) {
|
|
kp->ki_sid = sp->s_sid;
|
|
SESS_LOCK(sp);
|
|
strncpy(kp->ki_login, sp->s_login,
|
|
sizeof(kp->ki_login) - 1);
|
|
if (sp->s_ttyvp)
|
|
kp->ki_kiflag |= KI_CTTY;
|
|
if (SESS_LEADER(p))
|
|
kp->ki_kiflag |= KI_SLEADER;
|
|
tp = sp->s_ttyp;
|
|
SESS_UNLOCK(sp);
|
|
}
|
|
}
|
|
if ((p->p_flag & P_CONTROLT) && tp != NULL) {
|
|
kp->ki_tdev = dev2udev(tp->t_dev);
|
|
kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
|
|
if (tp->t_session)
|
|
kp->ki_tsid = tp->t_session->s_sid;
|
|
} else
|
|
kp->ki_tdev = NOUDEV;
|
|
if (p->p_comm[0] != '\0') {
|
|
strncpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm) - 1);
|
|
strncpy(kp->ki_ocomm, p->p_comm, sizeof(kp->ki_ocomm) - 1);
|
|
}
|
|
kp->ki_siglist = p->p_siglist;
|
|
kp->ki_sigmask = p->p_sigmask;
|
|
kp->ki_xstat = p->p_xstat;
|
|
kp->ki_acflag = p->p_acflag;
|
|
kp->ki_flag = p->p_flag;
|
|
/* If jailed(p->p_ucred), emulate the old P_JAILED flag. */
|
|
if (jailed(p->p_ucred))
|
|
kp->ki_flag |= P_JAILED;
|
|
kp->ki_lock = p->p_lock;
|
|
if (p->p_pptr)
|
|
kp->ki_ppid = p->p_pptr->p_pid;
|
|
}
|
|
|
|
/*
|
|
* Locate a zombie process by number
|
|
*/
|
|
struct proc *
|
|
zpfind(pid_t pid)
|
|
{
|
|
struct proc *p;
|
|
|
|
sx_slock(&allproc_lock);
|
|
LIST_FOREACH(p, &zombproc, p_list)
|
|
if (p->p_pid == pid) {
|
|
PROC_LOCK(p);
|
|
break;
|
|
}
|
|
sx_sunlock(&allproc_lock);
|
|
return (p);
|
|
}
|
|
|
|
|
|
/*
|
|
* Must be called with the process locked and will return with it unlocked.
|
|
*/
|
|
static int
|
|
sysctl_out_proc(struct proc *p, struct sysctl_req *req, int doingzomb)
|
|
{
|
|
struct kinfo_proc kinfo_proc;
|
|
int error;
|
|
struct proc *np;
|
|
pid_t pid = p->p_pid;
|
|
|
|
PROC_LOCK_ASSERT(p, MA_OWNED);
|
|
fill_kinfo_proc(p, &kinfo_proc);
|
|
PROC_UNLOCK(p);
|
|
error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc, sizeof(kinfo_proc));
|
|
if (error)
|
|
return (error);
|
|
if (doingzomb)
|
|
np = zpfind(pid);
|
|
else {
|
|
if (pid == 0)
|
|
return (0);
|
|
np = pfind(pid);
|
|
}
|
|
if (np == NULL)
|
|
return EAGAIN;
|
|
if (np != p) {
|
|
PROC_UNLOCK(np);
|
|
return EAGAIN;
|
|
}
|
|
PROC_UNLOCK(np);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sysctl_kern_proc(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int *name = (int*) arg1;
|
|
u_int namelen = arg2;
|
|
struct proc *p;
|
|
int doingzomb;
|
|
int error = 0;
|
|
|
|
if (oidp->oid_number == KERN_PROC_PID) {
|
|
if (namelen != 1)
|
|
return (EINVAL);
|
|
p = pfind((pid_t)name[0]);
|
|
if (!p)
|
|
return (0);
|
|
if (p_cansee(curthread, p)) {
|
|
PROC_UNLOCK(p);
|
|
return (0);
|
|
}
|
|
error = sysctl_out_proc(p, req, 0);
|
|
return (error);
|
|
}
|
|
if (oidp->oid_number == KERN_PROC_ALL && !namelen)
|
|
;
|
|
else if (oidp->oid_number != KERN_PROC_ALL && namelen == 1)
|
|
;
|
|
else
|
|
return (EINVAL);
|
|
|
|
if (!req->oldptr) {
|
|
/* overestimate by 5 procs */
|
|
error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
sx_slock(&allproc_lock);
|
|
for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) {
|
|
if (!doingzomb)
|
|
p = LIST_FIRST(&allproc);
|
|
else
|
|
p = LIST_FIRST(&zombproc);
|
|
for (; p != 0; p = LIST_NEXT(p, p_list)) {
|
|
PROC_LOCK(p);
|
|
/*
|
|
* Show a user only appropriate processes.
|
|
*/
|
|
if (p_cansee(curthread, p)) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
/*
|
|
* Skip embryonic processes.
|
|
*/
|
|
if (p->p_state == PRS_NEW) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
/*
|
|
* TODO - make more efficient (see notes below).
|
|
* do by session.
|
|
*/
|
|
switch (oidp->oid_number) {
|
|
|
|
case KERN_PROC_PGRP:
|
|
/* could do this by traversing pgrp */
|
|
if (p->p_pgrp == NULL ||
|
|
p->p_pgrp->pg_id != (pid_t)name[0]) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
break;
|
|
|
|
case KERN_PROC_TTY:
|
|
if ((p->p_flag & P_CONTROLT) == 0 ||
|
|
p->p_session == NULL) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
SESS_LOCK(p->p_session);
|
|
if (p->p_session->s_ttyp == NULL ||
|
|
dev2udev(p->p_session->s_ttyp->t_dev) !=
|
|
(udev_t)name[0]) {
|
|
SESS_UNLOCK(p->p_session);
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
SESS_UNLOCK(p->p_session);
|
|
break;
|
|
|
|
case KERN_PROC_UID:
|
|
if (p->p_ucred == NULL ||
|
|
p->p_ucred->cr_uid != (uid_t)name[0]) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
break;
|
|
|
|
case KERN_PROC_RUID:
|
|
if (p->p_ucred == NULL ||
|
|
p->p_ucred->cr_ruid != (uid_t)name[0]) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
break;
|
|
}
|
|
|
|
error = sysctl_out_proc(p, req, doingzomb);
|
|
if (error) {
|
|
sx_sunlock(&allproc_lock);
|
|
return (error);
|
|
}
|
|
}
|
|
}
|
|
sx_sunlock(&allproc_lock);
|
|
return (0);
|
|
}
|
|
|
|
struct pargs *
|
|
pargs_alloc(int len)
|
|
{
|
|
struct pargs *pa;
|
|
|
|
MALLOC(pa, struct pargs *, sizeof(struct pargs) + len, M_PARGS,
|
|
M_WAITOK);
|
|
pa->ar_ref = 1;
|
|
pa->ar_length = len;
|
|
return (pa);
|
|
}
|
|
|
|
void
|
|
pargs_free(struct pargs *pa)
|
|
{
|
|
|
|
FREE(pa, M_PARGS);
|
|
}
|
|
|
|
void
|
|
pargs_hold(struct pargs *pa)
|
|
{
|
|
|
|
if (pa == NULL)
|
|
return;
|
|
PARGS_LOCK(pa);
|
|
pa->ar_ref++;
|
|
PARGS_UNLOCK(pa);
|
|
}
|
|
|
|
void
|
|
pargs_drop(struct pargs *pa)
|
|
{
|
|
|
|
if (pa == NULL)
|
|
return;
|
|
PARGS_LOCK(pa);
|
|
if (--pa->ar_ref == 0) {
|
|
PARGS_UNLOCK(pa);
|
|
pargs_free(pa);
|
|
} else
|
|
PARGS_UNLOCK(pa);
|
|
}
|
|
|
|
/*
|
|
* This sysctl allows a process to retrieve the argument list or process
|
|
* title for another process without groping around in the address space
|
|
* of the other process. It also allow a process to set its own "process
|
|
* title to a string of its own choice.
|
|
*/
|
|
static int
|
|
sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int *name = (int*) arg1;
|
|
u_int namelen = arg2;
|
|
struct proc *p;
|
|
struct pargs *pa;
|
|
int error = 0;
|
|
|
|
if (namelen != 1)
|
|
return (EINVAL);
|
|
|
|
p = pfind((pid_t)name[0]);
|
|
if (!p)
|
|
return (0);
|
|
|
|
if ((!ps_argsopen) && p_cansee(curthread, p)) {
|
|
PROC_UNLOCK(p);
|
|
return (0);
|
|
}
|
|
PROC_UNLOCK(p);
|
|
|
|
if (req->newptr && curproc != p)
|
|
return (EPERM);
|
|
|
|
PROC_LOCK(p);
|
|
pa = p->p_args;
|
|
pargs_hold(pa);
|
|
PROC_UNLOCK(p);
|
|
if (req->oldptr && pa != NULL) {
|
|
error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length);
|
|
}
|
|
pargs_drop(pa);
|
|
if (req->newptr == NULL)
|
|
return (error);
|
|
|
|
PROC_LOCK(p);
|
|
pa = p->p_args;
|
|
p->p_args = NULL;
|
|
PROC_UNLOCK(p);
|
|
pargs_drop(pa);
|
|
|
|
if (req->newlen + sizeof(struct pargs) > ps_arg_cache_limit)
|
|
return (error);
|
|
|
|
pa = pargs_alloc(req->newlen);
|
|
error = SYSCTL_IN(req, pa->ar_args, req->newlen);
|
|
if (!error) {
|
|
PROC_LOCK(p);
|
|
p->p_args = pa;
|
|
PROC_UNLOCK(p);
|
|
} else
|
|
pargs_free(pa);
|
|
return (error);
|
|
}
|
|
|
|
SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table");
|
|
|
|
SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT,
|
|
0, 0, sysctl_kern_proc, "S,proc", "Return entire process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args, CTLFLAG_RW | CTLFLAG_ANYBODY,
|
|
sysctl_kern_proc_args, "Process argument list");
|
|
|
|
SYSCTL_INT(_kern_proc, OID_AUTO, active, CTLFLAG_RD,
|
|
&active_procs, 0, "Number of active procs in system.");
|
|
|
|
SYSCTL_INT(_kern_proc, OID_AUTO, cached, CTLFLAG_RD,
|
|
&cached_procs, 0, "Number of procs in proc cache.");
|
|
|
|
SYSCTL_INT(_kern_proc, OID_AUTO, allocated, CTLFLAG_RD,
|
|
&allocated_procs, 0, "Number of procs in zone.");
|