a7d72265c4
used as an address value. Then all comparisons should be done unsigned and not signed. Fix it with a typecast of u_quad_t. Error can be demonstrated with the current bash in port, do a ulimit -s unlimited and the machine hangs. bash delivers through an internal error a large negative value for the stacksize, the comparison saw this smaller than MAXSSIZ and then tried to expand the stack to this size.
561 lines
13 KiB
C
561 lines
13 KiB
C
/*-
|
|
* Copyright (c) 1982, 1986, 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.
|
|
*
|
|
* @(#)kern_resource.c 8.5 (Berkeley) 1/21/94
|
|
* $Id: kern_resource.c,v 1.7 1994/10/10 01:00:46 phk Exp $
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/file.h>
|
|
#include <sys/resourcevar.h>
|
|
#include <sys/malloc.h>
|
|
#include <sys/proc.h>
|
|
|
|
#include <vm/vm.h>
|
|
|
|
int donice __P((struct proc *, struct proc *, int));
|
|
int dosetrlimit __P((struct proc *, u_int, struct rlimit *));
|
|
|
|
/*
|
|
* Resource controls and accounting.
|
|
*/
|
|
|
|
struct getpriority_args {
|
|
int which;
|
|
int who;
|
|
};
|
|
int
|
|
getpriority(curp, uap, retval)
|
|
struct proc *curp;
|
|
register struct getpriority_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct proc *p;
|
|
register int low = PRIO_MAX + 1;
|
|
|
|
switch (uap->which) {
|
|
|
|
case PRIO_PROCESS:
|
|
if (uap->who == 0)
|
|
p = curp;
|
|
else
|
|
p = pfind(uap->who);
|
|
if (p == 0)
|
|
break;
|
|
low = p->p_nice;
|
|
break;
|
|
|
|
case PRIO_PGRP: {
|
|
register struct pgrp *pg;
|
|
|
|
if (uap->who == 0)
|
|
pg = curp->p_pgrp;
|
|
else if ((pg = pgfind(uap->who)) == NULL)
|
|
break;
|
|
for (p = pg->pg_mem; p != NULL; p = p->p_pgrpnxt) {
|
|
if (p->p_nice < low)
|
|
low = p->p_nice;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PRIO_USER:
|
|
if (uap->who == 0)
|
|
uap->who = curp->p_ucred->cr_uid;
|
|
for (p = (struct proc *)allproc; p != NULL; p = p->p_next) {
|
|
if (p->p_ucred->cr_uid == uap->who &&
|
|
p->p_nice < low)
|
|
low = p->p_nice;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
if (low == PRIO_MAX + 1)
|
|
return (ESRCH);
|
|
*retval = low;
|
|
return (0);
|
|
}
|
|
|
|
struct setpriority_args {
|
|
int which;
|
|
int who;
|
|
int prio;
|
|
};
|
|
/* ARGSUSED */
|
|
int
|
|
setpriority(curp, uap, retval)
|
|
struct proc *curp;
|
|
register struct setpriority_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct proc *p;
|
|
int found = 0, error = 0;
|
|
|
|
switch (uap->which) {
|
|
|
|
case PRIO_PROCESS:
|
|
if (uap->who == 0)
|
|
p = curp;
|
|
else
|
|
p = pfind(uap->who);
|
|
if (p == 0)
|
|
break;
|
|
error = donice(curp, p, uap->prio);
|
|
found++;
|
|
break;
|
|
|
|
case PRIO_PGRP: {
|
|
register struct pgrp *pg;
|
|
|
|
if (uap->who == 0)
|
|
pg = curp->p_pgrp;
|
|
else if ((pg = pgfind(uap->who)) == NULL)
|
|
break;
|
|
for (p = pg->pg_mem; p != NULL; p = p->p_pgrpnxt) {
|
|
error = donice(curp, p, uap->prio);
|
|
found++;
|
|
}
|
|
break;
|
|
}
|
|
|
|
case PRIO_USER:
|
|
if (uap->who == 0)
|
|
uap->who = curp->p_ucred->cr_uid;
|
|
for (p = (struct proc *)allproc; p != NULL; p = p->p_next)
|
|
if (p->p_ucred->cr_uid == uap->who) {
|
|
error = donice(curp, p, uap->prio);
|
|
found++;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
if (found == 0)
|
|
return (ESRCH);
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
donice(curp, chgp, n)
|
|
register struct proc *curp, *chgp;
|
|
register int n;
|
|
{
|
|
register struct pcred *pcred = curp->p_cred;
|
|
|
|
if (pcred->pc_ucred->cr_uid && pcred->p_ruid &&
|
|
pcred->pc_ucred->cr_uid != chgp->p_ucred->cr_uid &&
|
|
pcred->p_ruid != chgp->p_ucred->cr_uid)
|
|
return (EPERM);
|
|
if (n > PRIO_MAX)
|
|
n = PRIO_MAX;
|
|
if (n < PRIO_MIN)
|
|
n = PRIO_MIN;
|
|
if (n < chgp->p_nice && suser(pcred->pc_ucred, &curp->p_acflag))
|
|
return (EACCES);
|
|
chgp->p_nice = n;
|
|
(void)resetpriority(chgp);
|
|
return (0);
|
|
}
|
|
|
|
/* rtprio system call */
|
|
struct rtprio_args {
|
|
int function;
|
|
pid_t pid;
|
|
struct rtprio *rtprio;
|
|
};
|
|
|
|
/*
|
|
* Set realtime priority
|
|
*/
|
|
|
|
/* ARGSUSED */
|
|
int
|
|
rtprio(curp, uap, retval)
|
|
struct proc *curp;
|
|
register struct rtprio_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct proc *p;
|
|
register struct pcred *pcred = curp->p_cred;
|
|
struct rtprio rtp;
|
|
int error;
|
|
|
|
error = copyin(uap->rtprio, &rtp, sizeof(struct rtprio));
|
|
if (error)
|
|
return (error);
|
|
|
|
if (uap->pid == 0)
|
|
p = curp;
|
|
else
|
|
p = pfind(uap->pid);
|
|
|
|
if (p == 0)
|
|
return (ESRCH);
|
|
|
|
switch (uap->function) {
|
|
case RTP_LOOKUP:
|
|
return (copyout(&p->p_rtprio, uap->rtprio, sizeof(struct rtprio)));
|
|
case RTP_SET:
|
|
if (pcred->pc_ucred->cr_uid && pcred->p_ruid &&
|
|
pcred->pc_ucred->cr_uid != p->p_ucred->cr_uid &&
|
|
pcred->p_ruid != p->p_ucred->cr_uid)
|
|
return (EPERM);
|
|
/* disallow setting rtprio in most cases if not superuser */
|
|
if (suser(pcred->pc_ucred, &curp->p_acflag)) {
|
|
/* can't set someone else's */
|
|
if (uap->pid)
|
|
return (EPERM);
|
|
/* can't set realtime priority */
|
|
if (rtp.type == RTP_PRIO_REALTIME)
|
|
return (EPERM);
|
|
}
|
|
switch (rtp.type) {
|
|
case RTP_PRIO_REALTIME:
|
|
case RTP_PRIO_NORMAL:
|
|
case RTP_PRIO_IDLE:
|
|
if (rtp.prio > RTP_PRIO_MAX)
|
|
return (EINVAL);
|
|
p->p_rtprio = rtp;
|
|
return (0);
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
}
|
|
|
|
#if defined(COMPAT_43) || defined(COMPAT_SUNOS)
|
|
struct setrlimit_args {
|
|
u_int which;
|
|
struct orlimit *lim;
|
|
};
|
|
/* ARGSUSED */
|
|
int
|
|
osetrlimit(p, uap, retval)
|
|
struct proc *p;
|
|
register struct setrlimit_args *uap;
|
|
int *retval;
|
|
{
|
|
struct orlimit olim;
|
|
struct rlimit lim;
|
|
int error;
|
|
|
|
if ((error =
|
|
copyin((caddr_t)uap->lim, (caddr_t)&olim, sizeof(struct orlimit))))
|
|
return (error);
|
|
lim.rlim_cur = olim.rlim_cur;
|
|
lim.rlim_max = olim.rlim_max;
|
|
return (dosetrlimit(p, uap->which, &lim));
|
|
}
|
|
|
|
struct getrlimit_args {
|
|
u_int which;
|
|
struct orlimit *rlp;
|
|
};
|
|
/* ARGSUSED */
|
|
int
|
|
ogetrlimit(p, uap, retval)
|
|
struct proc *p;
|
|
register struct getrlimit_args *uap;
|
|
int *retval;
|
|
{
|
|
struct orlimit olim;
|
|
|
|
if (uap->which >= RLIM_NLIMITS)
|
|
return (EINVAL);
|
|
olim.rlim_cur = p->p_rlimit[uap->which].rlim_cur;
|
|
if (olim.rlim_cur == -1)
|
|
olim.rlim_cur = 0x7fffffff;
|
|
olim.rlim_max = p->p_rlimit[uap->which].rlim_max;
|
|
if (olim.rlim_max == -1)
|
|
olim.rlim_max = 0x7fffffff;
|
|
return (copyout((caddr_t)&olim, (caddr_t)uap->rlp, sizeof(olim)));
|
|
}
|
|
#endif /* COMPAT_43 || COMPAT_SUNOS */
|
|
|
|
struct __setrlimit_args {
|
|
u_int which;
|
|
struct rlimit *lim;
|
|
};
|
|
/* ARGSUSED */
|
|
int
|
|
setrlimit(p, uap, retval)
|
|
struct proc *p;
|
|
register struct __setrlimit_args *uap;
|
|
int *retval;
|
|
{
|
|
struct rlimit alim;
|
|
int error;
|
|
|
|
if ((error =
|
|
copyin((caddr_t)uap->lim, (caddr_t)&alim, sizeof (struct rlimit))))
|
|
return (error);
|
|
return (dosetrlimit(p, uap->which, &alim));
|
|
}
|
|
|
|
int
|
|
dosetrlimit(p, which, limp)
|
|
struct proc *p;
|
|
u_int which;
|
|
struct rlimit *limp;
|
|
{
|
|
register struct rlimit *alimp;
|
|
int error;
|
|
|
|
if (which >= RLIM_NLIMITS)
|
|
return (EINVAL);
|
|
alimp = &p->p_rlimit[which];
|
|
if (limp->rlim_cur > alimp->rlim_max ||
|
|
limp->rlim_max > alimp->rlim_max)
|
|
if ((error = suser(p->p_ucred, &p->p_acflag)))
|
|
return (error);
|
|
if (limp->rlim_cur > limp->rlim_max)
|
|
limp->rlim_cur = limp->rlim_max;
|
|
if (p->p_limit->p_refcnt > 1 &&
|
|
(p->p_limit->p_lflags & PL_SHAREMOD) == 0) {
|
|
p->p_limit->p_refcnt--;
|
|
p->p_limit = limcopy(p->p_limit);
|
|
alimp = &p->p_rlimit[which];
|
|
}
|
|
|
|
switch (which) {
|
|
|
|
case RLIMIT_DATA:
|
|
if ((u_quad_t) limp->rlim_cur > MAXDSIZ)
|
|
limp->rlim_cur = MAXDSIZ;
|
|
if ((u_quad_t) limp->rlim_max > MAXDSIZ)
|
|
limp->rlim_max = MAXDSIZ;
|
|
break;
|
|
|
|
case RLIMIT_STACK:
|
|
if ((u_quad_t) limp->rlim_cur > MAXSSIZ)
|
|
limp->rlim_cur = MAXSSIZ;
|
|
if ((u_quad_t) limp->rlim_max > MAXSSIZ)
|
|
limp->rlim_max = MAXSSIZ;
|
|
/*
|
|
* Stack is allocated to the max at exec time with only
|
|
* "rlim_cur" bytes accessible. If stack limit is going
|
|
* up make more accessible, if going down make inaccessible.
|
|
*/
|
|
if (limp->rlim_cur != alimp->rlim_cur) {
|
|
vm_offset_t addr;
|
|
vm_size_t size;
|
|
vm_prot_t prot;
|
|
|
|
if ((u_quad_t) limp->rlim_cur > alimp->rlim_cur) {
|
|
prot = VM_PROT_ALL;
|
|
size = limp->rlim_cur - alimp->rlim_cur;
|
|
addr = USRSTACK - limp->rlim_cur;
|
|
} else {
|
|
prot = VM_PROT_NONE;
|
|
size = alimp->rlim_cur - limp->rlim_cur;
|
|
addr = USRSTACK - alimp->rlim_cur;
|
|
}
|
|
addr = trunc_page(addr);
|
|
size = round_page(size);
|
|
(void) vm_map_protect(&p->p_vmspace->vm_map,
|
|
addr, addr+size, prot, FALSE);
|
|
}
|
|
break;
|
|
|
|
case RLIMIT_NOFILE:
|
|
if (limp->rlim_cur > maxfiles)
|
|
limp->rlim_cur = maxfiles;
|
|
if (limp->rlim_max > maxfiles)
|
|
limp->rlim_max = maxfiles;
|
|
break;
|
|
|
|
case RLIMIT_NPROC:
|
|
if (limp->rlim_cur > maxproc)
|
|
limp->rlim_cur = maxproc;
|
|
if (limp->rlim_max > maxproc)
|
|
limp->rlim_max = maxproc;
|
|
break;
|
|
}
|
|
*alimp = *limp;
|
|
return (0);
|
|
}
|
|
|
|
struct __getrlimit_args {
|
|
u_int which;
|
|
struct rlimit *rlp;
|
|
};
|
|
/* ARGSUSED */
|
|
int
|
|
getrlimit(p, uap, retval)
|
|
struct proc *p;
|
|
register struct __getrlimit_args *uap;
|
|
int *retval;
|
|
{
|
|
|
|
if (uap->which >= RLIM_NLIMITS)
|
|
return (EINVAL);
|
|
return (copyout((caddr_t)&p->p_rlimit[uap->which], (caddr_t)uap->rlp,
|
|
sizeof (struct rlimit)));
|
|
}
|
|
|
|
/*
|
|
* Transform the running time and tick information in proc p into user,
|
|
* system, and interrupt time usage.
|
|
*/
|
|
void
|
|
calcru(p, up, sp, ip)
|
|
register struct proc *p;
|
|
register struct timeval *up;
|
|
register struct timeval *sp;
|
|
register struct timeval *ip;
|
|
{
|
|
register u_quad_t u, st, ut, it, tot;
|
|
register u_long sec, usec;
|
|
register int s;
|
|
struct timeval tv;
|
|
|
|
s = splstatclock();
|
|
st = p->p_sticks;
|
|
ut = p->p_uticks;
|
|
it = p->p_iticks;
|
|
splx(s);
|
|
|
|
tot = st + ut + it;
|
|
if (tot == 0) {
|
|
up->tv_sec = up->tv_usec = 0;
|
|
sp->tv_sec = sp->tv_usec = 0;
|
|
if (ip != NULL)
|
|
ip->tv_sec = ip->tv_usec = 0;
|
|
return;
|
|
}
|
|
|
|
sec = p->p_rtime.tv_sec;
|
|
usec = p->p_rtime.tv_usec;
|
|
if (p == curproc) {
|
|
/*
|
|
* Adjust for the current time slice. This is actually fairly
|
|
* important since the error here is on the order of a time
|
|
* quantum, which is much greater than the sampling error.
|
|
*/
|
|
microtime(&tv);
|
|
sec += tv.tv_sec - runtime.tv_sec;
|
|
usec += tv.tv_usec - runtime.tv_usec;
|
|
}
|
|
u = sec * 1000000 + usec;
|
|
st = (u * st) / tot;
|
|
sp->tv_sec = st / 1000000;
|
|
sp->tv_usec = st % 1000000;
|
|
ut = (u * ut) / tot;
|
|
up->tv_sec = ut / 1000000;
|
|
up->tv_usec = ut % 1000000;
|
|
if (ip != NULL) {
|
|
it = (u * it) / tot;
|
|
ip->tv_sec = it / 1000000;
|
|
ip->tv_usec = it % 1000000;
|
|
}
|
|
}
|
|
|
|
struct getrusage_args {
|
|
int who;
|
|
struct rusage *rusage;
|
|
};
|
|
/* ARGSUSED */
|
|
int
|
|
getrusage(p, uap, retval)
|
|
register struct proc *p;
|
|
register struct getrusage_args *uap;
|
|
int *retval;
|
|
{
|
|
register struct rusage *rup;
|
|
|
|
switch (uap->who) {
|
|
|
|
case RUSAGE_SELF:
|
|
rup = &p->p_stats->p_ru;
|
|
calcru(p, &rup->ru_utime, &rup->ru_stime, NULL);
|
|
break;
|
|
|
|
case RUSAGE_CHILDREN:
|
|
rup = &p->p_stats->p_cru;
|
|
break;
|
|
|
|
default:
|
|
return (EINVAL);
|
|
}
|
|
return (copyout((caddr_t)rup, (caddr_t)uap->rusage,
|
|
sizeof (struct rusage)));
|
|
}
|
|
|
|
void
|
|
ruadd(ru, ru2)
|
|
register struct rusage *ru, *ru2;
|
|
{
|
|
register long *ip, *ip2;
|
|
register int i;
|
|
|
|
timevaladd(&ru->ru_utime, &ru2->ru_utime);
|
|
timevaladd(&ru->ru_stime, &ru2->ru_stime);
|
|
if (ru->ru_maxrss < ru2->ru_maxrss)
|
|
ru->ru_maxrss = ru2->ru_maxrss;
|
|
ip = &ru->ru_first; ip2 = &ru2->ru_first;
|
|
for (i = &ru->ru_last - &ru->ru_first; i >= 0; i--)
|
|
*ip++ += *ip2++;
|
|
}
|
|
|
|
/*
|
|
* Make a copy of the plimit structure.
|
|
* We share these structures copy-on-write after fork,
|
|
* and copy when a limit is changed.
|
|
*/
|
|
struct plimit *
|
|
limcopy(lim)
|
|
struct plimit *lim;
|
|
{
|
|
register struct plimit *copy;
|
|
|
|
MALLOC(copy, struct plimit *, sizeof(struct plimit),
|
|
M_SUBPROC, M_WAITOK);
|
|
bcopy(lim->pl_rlimit, copy->pl_rlimit,
|
|
sizeof(struct rlimit) * RLIM_NLIMITS);
|
|
copy->p_lflags = 0;
|
|
copy->p_refcnt = 1;
|
|
return (copy);
|
|
}
|