Implement maxprocperuid and maxfilesperproc. They are tunable
via sysctl(8). The initial value of maxprocperuid is maxproc-1, that of maxfilesperproc is maxfiles (untill maxfile will disappear) Now it is at least possible to prohibit one user opening maxfiles -Guido Submitted by: Obtained from:
This commit is contained in:
Guido van Rooij
parent
95104c63d5
commit
e6373c9ec0
@ -30,7 +30,7 @@
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.\" SUCH DAMAGE.
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.\"
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.\" From: @(#)sysctl.8 8.1 (Berkeley) 6/6/93
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.\" $Id: sysctl.8,v 1.4 1994/10/18 03:41:16 ache Exp $
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.\" $Id: sysctl.8,v 1.5 1995/02/16 00:28:40 wollman Exp $
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.\"
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.Dd September 23, 1994
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.Dt SYSCTL 8
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@ -107,7 +107,9 @@ privilege can change the value.
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.It kern.version string no
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.It kern.maxvnodes integer yes
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.It kern.maxproc integer yes
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.It kern.maxprocperuid integer yes
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.It kern.maxfiles integer yes
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.It kern.maxfilesperproc integer yes
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.It kern.argmax integer no
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.It kern.securelevel integer raise only
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.It kern.hostname string yes
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@ -36,7 +36,7 @@
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* SUCH DAMAGE.
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*
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* @(#)param.c 8.2 (Berkeley) 1/21/94
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* $Id: param.c,v 1.6 1995/01/12 03:38:12 davidg Exp $
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* $Id: param.c,v 1.7 1995/02/16 11:29:19 joerg Exp $
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*/
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#include <sys/param.h>
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@ -82,7 +82,9 @@ int tickadj = 30000 / (60 * HZ); /* can adjust 30ms in 60s */
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struct timezone tz = { TIMEZONE, DST };
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#define NPROC (20 + 16 * MAXUSERS)
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int maxproc = NPROC; /* maximum # of processes */
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int maxprocperuid = NPROC-1; /* maximum # of processes per user */
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int maxfiles = NPROC*2; /* system wide open files limit */
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int maxfilesperproc = NPROC*2; /* system wide open files limit */
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int ncallout = 16 + NPROC; /* maximum # of timer events */
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int nmbclusters = NMBCLUSTERS;
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int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */
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@ -36,7 +36,7 @@
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* SUCH DAMAGE.
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*
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* @(#)kern_descrip.c 8.6 (Berkeley) 4/19/94
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* $Id: kern_descrip.c,v 1.6 1994/10/02 17:35:11 phk Exp $
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* $Id: kern_descrip.c,v 1.7 1994/12/12 12:27:39 bde Exp $
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*/
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#include <sys/param.h>
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@ -78,7 +78,7 @@ getdtablesize(p, uap, retval)
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int *retval;
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{
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*retval = min((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, maxfiles);
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*retval = min((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, maxfilesperproc);
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return (0);
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}
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@ -103,7 +103,7 @@ dup2(p, uap, retval)
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if (old >= fdp->fd_nfiles ||
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fdp->fd_ofiles[old] == NULL ||
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new >= p->p_rlimit[RLIMIT_NOFILE].rlim_cur ||
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new >= maxfiles)
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new >= maxfilesperproc)
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return (EBADF);
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if (old == new) {
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*retval = new;
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@ -191,7 +191,7 @@ fcntl(p, uap, retval)
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case F_DUPFD:
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newmin = uap->arg;
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if (newmin >= p->p_rlimit[RLIMIT_NOFILE].rlim_cur ||
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newmin >= maxfiles)
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newmin >= maxfilesperproc)
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return (EINVAL);
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if ((error = fdalloc(p, newmin, &i)))
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return (error);
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@ -507,7 +507,7 @@ fdalloc(p, want, result)
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* of want or fd_freefile. If that fails, consider
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* expanding the ofile array.
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*/
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lim = min((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, maxfiles);
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lim = min((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, maxfilesperproc);
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for (;;) {
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last = min(fdp->fd_nfiles, lim);
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if ((i = want) < fdp->fd_freefile)
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@ -569,7 +569,7 @@ fdavail(p, n)
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register struct file **fpp;
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register int i, lim;
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lim = min((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, maxfiles);
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lim = min((int)p->p_rlimit[RLIMIT_NOFILE].rlim_cur, maxfilesperproc);
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if ((i = lim - fdp->fd_nfiles) > 0 && (n -= i) <= 0)
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return (1);
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fpp = &fdp->fd_ofiles[fdp->fd_freefile];
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@ -36,7 +36,7 @@
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* SUCH DAMAGE.
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*
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* @(#)kern_resource.c 8.5 (Berkeley) 1/21/94
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* $Id: kern_resource.c,v 1.9 1994/12/02 23:00:40 ats Exp $
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* $Id: kern_resource.c,v 1.10 1994/12/06 22:53:37 bde Exp $
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*/
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#include <sys/param.h>
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@ -409,17 +409,17 @@ dosetrlimit(p, which, limp)
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break;
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case RLIMIT_NOFILE:
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if (limp->rlim_cur > maxfiles)
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limp->rlim_cur = maxfiles;
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if (limp->rlim_max > maxfiles)
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limp->rlim_max = maxfiles;
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if (limp->rlim_cur > maxfilesperproc)
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limp->rlim_cur = maxfilesperproc;
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if (limp->rlim_max > maxfilesperproc)
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limp->rlim_max = maxfilesperproc;
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break;
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case RLIMIT_NPROC:
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if (limp->rlim_cur > maxproc)
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limp->rlim_cur = maxproc;
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if (limp->rlim_max > maxproc)
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limp->rlim_max = maxproc;
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if (limp->rlim_cur > maxprocperuid)
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limp->rlim_cur = maxprocperuid;
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if (limp->rlim_max > maxprocperuid)
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limp->rlim_max = maxprocperuid;
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break;
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}
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*alimp = *limp;
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* @(#)kern_sysctl.c 8.4 (Berkeley) 4/14/94
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* $Id: kern_sysctl.c,v 1.20 1994/12/18 13:56:50 guido Exp $
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* $Id: kern_sysctl.c,v 1.21 1994/12/28 06:15:08 davidg Exp $
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*/
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/*
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@ -217,8 +217,12 @@ kern_sysctl(name, namelen, oldp, oldlenp, newp, newlen, p)
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return(sysctl_int(oldp, oldlenp, newp, newlen, &desiredvnodes));
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case KERN_MAXPROC:
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return (sysctl_int(oldp, oldlenp, newp, newlen, &maxproc));
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case KERN_MAXPROCPERUID:
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return (sysctl_int(oldp, oldlenp, newp, newlen, &maxprocperuid));
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case KERN_MAXFILES:
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return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfiles));
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case KERN_MAXFILESPERPROC:
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return (sysctl_int(oldp, oldlenp, newp, newlen, &maxfilesperproc));
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case KERN_UPDATEINTERVAL:
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/*
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* NB: this simple-minded approach only works because
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@ -36,7 +36,7 @@
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* SUCH DAMAGE.
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*
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* @(#)param.c 8.2 (Berkeley) 1/21/94
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* $Id: param.c,v 1.6 1995/01/12 03:38:12 davidg Exp $
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* $Id: param.c,v 1.7 1995/02/16 11:29:19 joerg Exp $
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*/
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#include <sys/param.h>
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@ -82,7 +82,9 @@ int tickadj = 30000 / (60 * HZ); /* can adjust 30ms in 60s */
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struct timezone tz = { TIMEZONE, DST };
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#define NPROC (20 + 16 * MAXUSERS)
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int maxproc = NPROC; /* maximum # of processes */
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int maxprocperuid = NPROC-1; /* maximum # of processes per user */
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int maxfiles = NPROC*2; /* system wide open files limit */
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int maxfilesperproc = NPROC*2; /* system wide open files limit */
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int ncallout = 16 + NPROC; /* maximum # of timer events */
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int nmbclusters = NMBCLUSTERS;
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int fscale = FSCALE; /* kernel uses `FSCALE', user uses `fscale' */
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@ -31,7 +31,7 @@
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* SUCH DAMAGE.
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*
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* @(#)file.h 8.1 (Berkeley) 6/2/93
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* $Id: file.h,v 1.2 1994/08/02 07:52:58 davidg Exp $
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* $Id: file.h,v 1.3 1994/08/21 04:41:45 paul Exp $
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*/
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#ifndef _SYS_FILE_H_
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@ -75,6 +75,7 @@ struct file {
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extern struct file *filehead; /* head of list of open files */
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extern int maxfiles; /* kernel limit on number of open files */
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extern int maxfilesperproc; /* per process limit on number of open files */
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extern int nfiles; /* actual number of open files */
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#endif /* KERNEL */
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@ -34,7 +34,7 @@
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* SUCH DAMAGE.
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*
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* @(#)sysctl.h 8.1 (Berkeley) 6/2/93
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* $Id: sysctl.h,v 1.18 1994/10/16 03:53:00 wollman Exp $
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* $Id: sysctl.h,v 1.19 1994/11/14 13:59:09 bde Exp $
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*/
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#ifndef _SYS_SYSCTL_H_
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@ -133,7 +133,9 @@ struct ctlname {
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#define KERN_OSRELDATE 24 /* int: OS release date */
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#define KERN_NTP_PLL 25 /* node: NTP PLL control */
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#define KERN_BOOTFILE 26 /* string: name of booted kernel */
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#define KERN_MAXID 27 /* number of valid kern ids */
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#define KERN_MAXFILESPERPROC 27 /* int: max open files per proc */
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#define KERN_MAXPROCPERUID 28 /* int: max processes per uid */
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#define KERN_MAXID 29 /* number of valid kern ids */
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#define CTL_KERN_NAMES { \
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{ 0, 0 }, \
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@ -163,6 +165,8 @@ struct ctlname {
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{ "osreldate", CTLTYPE_INT }, \
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{ "ntp_pll", CTLTYPE_NODE }, \
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{ "bootfile", CTLTYPE_STRING }, \
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{ "maxfilesperproc", CTLTYPE_INT }, \
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{ "maxprocperuid", CTLTYPE_INT }, \
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}
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/*
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@ -30,7 +30,7 @@
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.\" SUCH DAMAGE.
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.\"
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.\" From: @(#)sysctl.8 8.1 (Berkeley) 6/6/93
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.\" $Id: sysctl.8,v 1.4 1994/10/18 03:41:16 ache Exp $
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.\" $Id: sysctl.8,v 1.5 1995/02/16 00:28:40 wollman Exp $
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.\"
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.Dd September 23, 1994
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.Dt SYSCTL 8
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@ -107,7 +107,9 @@ privilege can change the value.
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.It kern.version string no
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.It kern.maxvnodes integer yes
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.It kern.maxproc integer yes
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.It kern.maxprocperuid integer yes
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.It kern.maxfiles integer yes
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.It kern.maxfilesperproc integer yes
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.It kern.argmax integer no
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.It kern.securelevel integer raise only
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.It kern.hostname string yes
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