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[unix-history] / usr / src / sys / kern / kern_resource.c
diff --git a/usr/src/sys/kern/kern_resource.c b/usr/src/sys/kern/kern_resource.c
index bbe6284..9f748f2 100644 (file)
--- a/usr/src/sys/kern/kern_resource.c
+++ b/usr/src/sys/kern/kern_resource.c
@@ -1,173 +1,329 @@
-/*     kern_resource.c 4.10    82/07/24        */
+/*     kern_resource.c 4.18    82/12/17        */
 
 #include "../h/param.h"
 #include "../h/systm.h"
 
 #include "../h/param.h"
 #include "../h/systm.h"
-#include "../h/acct.h"
 #include "../h/dir.h"
 #include "../h/user.h"
 #include "../h/inode.h"
 #include "../h/proc.h"
 #include "../h/seg.h"
 #include "../h/fs.h"
 #include "../h/dir.h"
 #include "../h/user.h"
 #include "../h/inode.h"
 #include "../h/proc.h"
 #include "../h/seg.h"
 #include "../h/fs.h"
-
-struct inode *acctp;
-struct inode *savacctp;
-
-long   acctlow = 2;            /* stop accounting when < 2% data space left */
-long   accthigh = 4;           /* resume when space risen to > 4% */
+#include "../h/uio.h"
+#include "../h/vm.h"
 
 /*
 
 /*
- * Perform process accounting functions.
+ * Resource controls and accounting.
  */
  */
-sysacct()
+
+getpriority()
 {
 {
-       register struct inode *ip;
        register struct a {
        register struct a {
-               char    *fname;
-       } *uap;
-
-       uap = (struct a *)u.u_ap;
-       if (suser()) {
-               if (savacctp) {
-                       acctp = savacctp;
-                       savacctp = NULL;
+               int     which;
+               int     who;
+       } *uap = (struct a *)u.u_ap;
+       register struct proc *p;
+
+       u.u_r.r_val1 = NZERO+20;
+       u.u_error = ESRCH;
+       switch (uap->which) {
+
+       case PRIO_PROCESS:
+               if (uap->who == 0)
+                       p = u.u_procp;
+               else
+                       p = pfind(uap->who);
+               if (p == 0)
+                       return;
+               u.u_r.r_val1 = u.u_procp->p_nice;
+               u.u_error = 0;
+               break;
+
+       case PRIO_PGRP:
+               if (uap->who == 0)
+                       uap->who = u.u_procp->p_pgrp;
+               for (p = proc; p < procNPROC; p++) {
+                       if (p->p_stat == NULL)
+                               continue;
+                       if (p->p_pgrp == uap->who &&
+                           p->p_nice < u.u_r.r_val1) {
+                               u.u_r.r_val1 = p->p_nice;
+                               u.u_error = 0;
+                       }
                }
                }
-               if (uap->fname==NULL) {
-                       if (ip = acctp) {
-                               irele(ip);
-                               acctp = NULL;
+               break;
+
+       case PRIO_USER:
+               if (uap->who == 0)
+                       uap->who = u.u_uid;
+               for (p = proc; p < procNPROC; p++) {
+                       if (p->p_stat == NULL)
+                               continue;
+                       if (p->p_uid == uap->who &&
+                           p->p_nice < u.u_r.r_val1) {
+                               u.u_r.r_val1 = p->p_nice;
+                               u.u_error = 0;
                        }
                        }
-                       return;
                }
                }
-               ip = namei(uchar, 0, 1);
-               if(ip == NULL)
-                       return;
-               if((ip->i_mode & IFMT) != IFREG) {
-                       u.u_error = EACCES;
-                       iput(ip);
+               break;
+
+       default:
+               u.u_error = EINVAL;
+               break;
+       }
+       u.u_r.r_val1 -= NZERO;
+}
+
+setpriority()
+{
+       register struct a {
+               int     which;
+               int     who;
+               int     prio;
+       } *uap = (struct a *)u.u_ap;
+       register struct proc *p;
+
+       u.u_error = ESRCH;
+       switch (uap->which) {
+
+       case PRIO_PROCESS:
+               if (uap->who == 0)
+                       p = u.u_procp;
+               else
+                       p = pfind(uap->who);
+               if (p == 0)
                        return;
                        return;
-               }
-               if (acctp && (acctp->i_number != ip->i_number ||
-                   acctp->i_dev != ip->i_dev))
-                       irele(acctp);
-               acctp = ip;
-               iunlock(ip);
+               donice(p, uap->prio);
+               break;
+
+       case PRIO_PGRP:
+               if (uap->who == 0)
+                       uap->who = u.u_procp->p_pgrp;
+               for (p = proc; p < procNPROC; p++)
+                       if (p->p_pgrp == uap->who)
+                               donice(p, uap->prio);
+               break;
+
+       case PRIO_USER:
+               if (uap->who == 0)
+                       uap->who = u.u_uid;
+               for (p = proc; p < procNPROC; p++)
+                       if (p->p_uid == uap->who)
+                               donice(p, uap->prio);
+               break;
+
+       default:
+               u.u_error = EINVAL;
+               break;
        }
 }
 
        }
 }
 
-struct acct acctbuf;
-/*
- * On exit, write a record on the accounting file.
- */
-acct()
+donice(p, n)
+       register struct proc *p;
+       register int n;
 {
 {
-       register i;
-       register struct inode *ip;
-       off_t siz;
-       register struct acct *ap = &acctbuf;
-
-       if (savacctp && savacctp->i_fs->fs_cstotal.cs_nbfree >
-           accthigh * savacctp->i_fs->fs_dsize / 100) {
-               acctp = savacctp;
-               savacctp = NULL;
-               printf("Accounting resumed\n");
+
+       if (u.u_uid && u.u_ruid &&
+           u.u_uid != p->p_uid && u.u_ruid != p->p_uid) {
+               u.u_error = EACCES;
+               return;
+       }
+       n += NZERO;
+       if (n >= 2*NZERO)
+               n = 2*NZERO - 1;
+       if (n < 0)
+               n = 0;
+       if (n < p->p_nice && !suser()) {
+               u.u_error = EACCES;
+               return;
        }
        }
-       if ((ip=acctp)==NULL)
+       p->p_nice = n;
+       (void) setpri(p);
+       if (u.u_error == ESRCH)
+               u.u_error = 0;
+}
+
+setrlimit()
+{
+       register struct a {
+               u_int   which;
+               struct  rlimit *lim;
+       } *uap = (struct a *)u.u_ap;
+       struct rlimit alim;
+       register struct rlimit *alimp;
+
+       if (uap->which >= RLIM_NLIMITS) {
+               u.u_error = EINVAL;
                return;
                return;
-       if (acctp->i_fs->fs_cstotal.cs_nbfree <
-           acctlow * acctp->i_fs->fs_dsize / 100) {
-               savacctp = acctp;
-               acctp = NULL;
-               printf("Accounting suspended\n");
+       }
+       alimp = &u.u_rlimit[uap->which];
+       if (copyin((caddr_t)uap->lim, (caddr_t)&alim, sizeof (struct rlimit))) {
+               u.u_error = EFAULT;
                return;
        }
                return;
        }
-       ilock(ip);
-       for (i=0; i<sizeof(ap->ac_comm); i++)
-               ap->ac_comm[i] = u.u_comm[i];
-       ap->ac_utime = compress((long)u.u_vm.vm_utime);
-       ap->ac_stime = compress((long)u.u_vm.vm_stime);
-       ap->ac_etime = compress((long)(time - u.u_start));
-       ap->ac_btime = u.u_start;
-       ap->ac_uid = u.u_ruid;
-       ap->ac_gid = u.u_rgid;
-       ap->ac_mem = 0;
-       if (i = u.u_vm.vm_utime + u.u_vm.vm_stime)
-               ap->ac_mem = (u.u_vm.vm_ixrss + u.u_vm.vm_idsrss) / i;
-       ap->ac_io = compress((long)(u.u_vm.vm_inblk + u.u_vm.vm_oublk));
-       if (u.u_ttyp)
-               ap->ac_tty = u.u_ttyd;
-       else
-               ap->ac_tty = NODEV;
-       ap->ac_flag = u.u_acflag;
-       siz = ip->i_size;
-       u.u_offset = siz;
-       u.u_base = (caddr_t)ap;
-       u.u_count = sizeof(acctbuf);
-       u.u_segflg = 1;
-       u.u_error = 0;
-       writei(ip);
-       if(u.u_error)
-               ip->i_size = siz;
-       iunlock(ip);
+       if (alim.rlim_cur > alimp->rlim_max || alim.rlim_max > alimp->rlim_max)
+               if (!suser())
+                       return;
+       switch (uap->which) {
+
+       case RLIMIT_DATA:
+               if (alim.rlim_cur > ctob(MAXDSIZ))
+                       alim.rlim_cur = ctob(MAXDSIZ);
+               break;
+
+       case RLIMIT_STACK:
+               if (alim.rlim_cur > ctob(MAXSSIZ))
+                       alim.rlim_cur = ctob(MAXSSIZ);
+               break;
+       }
+       *alimp = alim;
+       if (uap->which == RLIMIT_RSS)
+               u.u_procp->p_maxrss = alim.rlim_cur/NBPG;
 }
 
 }
 
-/*
- * Produce a pseudo-floating point representation
- * with 3 bits base-8 exponent, 13 bits fraction.
- */
-compress(t)
-register long t;
+getrlimit()
 {
 {
-       register exp = 0, round = 0;
+       register struct a {
+               u_int   which;
+               struct  rlimit *rlp;
+       } *uap = (struct a *)u.u_ap;
 
 
-       while (t >= 8192) {
-               exp++;
-               round = t&04;
-               t >>= 3;
+       if (uap->which >= RLIM_NLIMITS) {
+               u.u_error = EINVAL;
+               return;
        }
        }
-       if (round) {
-               t++;
-               if (t >= 8192) {
-                       t >>= 3;
-                       exp++;
-               }
+       if (copyout((caddr_t)&u.u_rlimit[uap->which], (caddr_t)uap->rlp,
+           sizeof (struct rlimit))) {
+               u.u_error = EFAULT;
+               return;
        }
        }
-       return((exp<<13) + t);
 }
 
 }
 
-vtimes()
+getrusage()
 {
        register struct a {
 {
        register struct a {
-               struct  vtimes *par_vm;
-               struct  vtimes *ch_vm;
+               int     who;
+               struct  rusage *rusage;
        } *uap = (struct a *)u.u_ap;
        } *uap = (struct a *)u.u_ap;
+       register struct rusage *rup;
+
+       switch (uap->who) {
 
 
-       if (uap->par_vm == 0)
-               goto onlych;
-       if (copyout((caddr_t)&u.u_vm, (caddr_t)uap->par_vm,
-           sizeof(struct vtimes)) < 0)
+       case RUSAGE_SELF:
+               rup = &u.u_ru;
+               break;
+
+       case RUSAGE_CHILDREN:
+               rup = &u.u_cru;
+               break;
+
+       default:
+               u.u_error = EINVAL;
+               return;
+       }
+       if (copyout((caddr_t)rup, (caddr_t)uap->rusage,
+           sizeof (struct rusage))) {
                u.u_error = EFAULT;
                u.u_error = EFAULT;
-onlych:
-       if (uap->ch_vm == 0)
                return;
                return;
-       if (copyout((caddr_t)&u.u_cvm, (caddr_t)uap->ch_vm,
-           sizeof(struct vtimes)) < 0)
+       }
+}
+
+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++;
+}
+
+#ifndef NOCOMPAT
+onice()
+{
+       register struct a {
+               int     niceness;
+       } *uap = (struct a *)u.u_ap;
+       register struct proc *p = u.u_procp;
+
+       donice(p, (p->p_nice-NZERO)+uap->niceness);
+}
+
+#include "../h/times.h"
+
+otimes()
+{
+       register struct a {
+               struct  tms *tmsb;
+       } *uap = (struct a *)u.u_ap;
+       struct tms atms;
+
+       atms.tms_utime = scale60(&u.u_ru.ru_utime);
+       atms.tms_stime = scale60(&u.u_ru.ru_stime);
+       atms.tms_cutime = scale60(&u.u_cru.ru_utime);
+       atms.tms_cstime = scale60(&u.u_cru.ru_stime);
+       if (copyout((caddr_t)&atms, (caddr_t)uap->tmsb, sizeof (atms))) {
                u.u_error = EFAULT;
                u.u_error = EFAULT;
+               return;
+       }
+}
+
+scale60(tvp)
+       register struct timeval *tvp;
+{
+
+       return (tvp->tv_sec * 60 + tvp->tv_usec / 16667);
+}
+
+#include "../h/vtimes.h"
+
+ovtimes()
+{
+       register struct a {
+               struct  vtimes *par;
+               struct  vtimes *chi;
+       } *uap = (struct a *)u.u_ap;
+       struct vtimes avt;
+
+       if (uap->par) {
+               getvtimes(&u.u_ru, &avt);
+               if (copyout((caddr_t)&avt, (caddr_t)uap->par, sizeof (avt))) {
+                       u.u_error = EFAULT;
+                       return;
+               }
+       }
+       if (uap->chi) {
+               getvtimes(&u.u_cru, &avt);
+               if (copyout((caddr_t)&avt, (caddr_t)uap->chi, sizeof (avt))) {
+                       u.u_error = EFAULT;
+                       return;
+               }
+       }
+}
+
+getvtimes(aru, avt)
+       register struct rusage *aru;
+       register struct vtimes *avt;
+{
+
+       avt->vm_utime = scale60(&aru->ru_utime);
+       avt->vm_stime = scale60(&aru->ru_stime);
+       avt->vm_idsrss = ((aru->ru_idrss+aru->ru_isrss) / hz) * 60;
+       avt->vm_ixrss = aru->ru_ixrss / hz * 60;
+       avt->vm_maxrss = aru->ru_maxrss;
+       avt->vm_majflt = aru->ru_majflt;
+       avt->vm_minflt = aru->ru_minflt;
+       avt->vm_nswap = aru->ru_nswap;
+       avt->vm_inblk = aru->ru_inblock;
+       avt->vm_oublk = aru->ru_oublock;
 }
 
 }
 
-vmsadd(vp, wp)
-       register struct vtimes *vp, *wp;
+ovlimit()
 {
 
 {
 
-       vp->vm_utime += wp->vm_utime;
-       vp->vm_stime += wp->vm_stime;
-       vp->vm_nswap += wp->vm_nswap;
-       vp->vm_idsrss += wp->vm_idsrss;
-       vp->vm_ixrss += wp->vm_ixrss;
-       if (vp->vm_maxrss < wp->vm_maxrss)
-               vp->vm_maxrss = wp->vm_maxrss;
-       vp->vm_majflt += wp->vm_majflt;
-       vp->vm_minflt += wp->vm_minflt;
-       vp->vm_inblk += wp->vm_inblk;
-       vp->vm_oublk += wp->vm_oublk;
+       u.u_error = EACCES;
 }
 }
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.