The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/resourcevar.h

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    1 /*
    2  * Copyright (c) 1991, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)resourcevar.h       8.4 (Berkeley) 1/9/95
   34  * $FreeBSD$
   35  */
   36 
   37 #ifndef _SYS_RESOURCEVAR_H_
   38 #define _SYS_RESOURCEVAR_H_
   39 
   40 #include <sys/resource.h>
   41 #include <sys/queue.h>
   42 
   43 /*
   44  * Kernel per-process accounting / statistics
   45  * (not necessarily resident except when running).
   46  */
   47 struct pstats {
   48 #define pstat_startzero p_ru
   49         struct  rusage p_ru;            /* stats for this proc */
   50         struct  rusage p_cru;           /* sum of stats for reaped children */
   51         struct  itimerval p_timer[3];   /* virtual-time timers */
   52 #define pstat_endzero   pstat_startcopy
   53 
   54 #define pstat_startcopy p_prof
   55         struct uprof {                  /* profile arguments */
   56                 caddr_t pr_base;        /* buffer base */
   57                 u_long  pr_size;        /* buffer size */
   58                 u_long  pr_off;         /* pc offset */
   59                 u_long  pr_scale;       /* pc scaling */
   60                 u_long  pr_addr;        /* temp storage for addr until AST */
   61                 u_long  pr_ticks;       /* temp storage for ticks until AST */
   62         } p_prof;
   63 #define pstat_endcopy   p_start
   64         struct  timeval p_start;        /* starting time */
   65 };
   66 
   67 /*
   68  * Kernel shareable process resource limits.  Because this structure
   69  * is moderately large but changes infrequently, it is normally
   70  * shared copy-on-write after forks.  If a group of processes
   71  * ("threads") share modifications, the PL_SHAREMOD flag is set,
   72  * and a copy must be made for the child of a new fork that isn't
   73  * sharing modifications to the limits.
   74  */
   75 struct plimit {
   76         struct  rlimit pl_rlimit[RLIM_NLIMITS];
   77 #define PL_SHAREMOD     0x01            /* modifications are shared */
   78         int     p_lflags;
   79         int     p_refcnt;               /* number of references */
   80         rlim_t  p_cpulimit;             /* current cpu limit in usec */
   81 };
   82 
   83 /*
   84  * Per uid resource consumption
   85  */
   86 struct uidinfo {
   87         LIST_ENTRY(uidinfo) ui_hash;
   88         rlim_t  ui_sbsize;              /* socket buffer space consumed */
   89         long    ui_proccnt;             /* number of processes */
   90         uid_t   ui_uid;                 /* uid */
   91         u_short ui_ref;                 /* reference count */
   92 };
   93 
   94 #ifdef _KERNEL
   95 #define uihold(uip)     (uip)->ui_ref++
   96 struct proc;
   97 
   98 void     addupc_intr __P((struct proc *p, u_long pc, u_int ticks));
   99 void     addupc_task __P((struct proc *p, u_long pc, u_int ticks));
  100 void     calcru __P((struct proc *p, struct timeval *up, struct timeval *sp,
  101             struct timeval *ip));
  102 int      chgproccnt __P((struct uidinfo *uip, int diff, int max));
  103 int      chgsbsize __P((struct uidinfo *uip, u_long *hiwat, u_long to,
  104             rlim_t max));
  105 int      fuswintr __P((void *base));
  106 struct plimit
  107         *limcopy __P((struct plimit *lim));
  108 void     ruadd __P((struct rusage *ru, struct rusage *ru2));
  109 int      suswintr __P((void *base, int word));
  110 struct uidinfo
  111         *uifind __P((uid_t uid));
  112 int      uifree __P((struct uidinfo *uip));
  113 void    uihashinit __P((void));
  114 #endif
  115 
  116 #endif  /* !_SYS_RESOURCEVAR_H_ */

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