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: releng/5.0/sys/sys/resourcevar.h 104719 2002-10-09 17:17:24Z jhb $
   35  */
   36 
   37 #ifndef _SYS_RESOURCEVAR_H_
   38 #define _SYS_RESOURCEVAR_H_
   39 
   40 #include <sys/resource.h>
   41 #include <sys/queue.h>
   42 #ifdef _KERNEL
   43 #include <sys/_lock.h>
   44 #include <sys/_mutex.h>
   45 #endif
   46 
   47 /*
   48  * Kernel per-process accounting / statistics
   49  * (not necessarily resident except when running).
   50  */
   51 struct pstats {
   52 #define pstat_startzero p_ru
   53         struct  rusage p_ru;            /* stats for this proc */
   54         struct  rusage p_cru;           /* sum of stats for reaped children */
   55 #define pstat_endzero   pstat_startcopy
   56 
   57 #define pstat_startcopy p_timer
   58         struct  itimerval p_timer[3];   /* virtual-time timers */
   59 
   60         struct uprof {                  /* profile arguments */
   61                 caddr_t pr_base;        /* buffer base */
   62                 u_long  pr_size;        /* buffer size */
   63                 u_long  pr_off;         /* pc offset */
   64                 u_long  pr_scale;       /* pc scaling */
   65                 u_long  pr_addr;        /* temp storage for addr until AST */
   66                 u_int   pr_ticks;       /* temp storage for ticks until AST */
   67         } p_prof;
   68 #define pstat_endcopy   p_start
   69         struct  timeval p_start;        /* starting time */
   70 };
   71 
   72 /*
   73  * Kernel shareable process resource limits.  Because this structure
   74  * is moderately large but changes infrequently, it is normally
   75  * shared copy-on-write after forks.  If a group of processes
   76  * ("threads") share modifications, the PL_SHAREMOD flag is set,
   77  * and a copy must be made for the child of a new fork that isn't
   78  * sharing modifications to the limits.
   79  */
   80 struct plimit {
   81         struct  rlimit pl_rlimit[RLIM_NLIMITS];
   82 #define PL_SHAREMOD     0x01            /* modifications are shared */
   83         int     p_lflags;
   84         int     p_refcnt;               /* number of references */
   85 };
   86 
   87 #ifdef _KERNEL
   88 
   89 /*
   90  * Per uid resource consumption
   91  */
   92 struct uidinfo {
   93         LIST_ENTRY(uidinfo) ui_hash;
   94         rlim_t  ui_sbsize;              /* socket buffer space consumed */
   95         long    ui_proccnt;             /* number of processes */
   96         uid_t   ui_uid;                 /* uid */
   97         u_short ui_ref;                 /* reference count */
   98         struct mtx      *ui_mtxp;       /* protect all counts/limits */
   99 };
  100 
  101 #define UIDINFO_LOCK(ui)        mtx_lock((ui)->ui_mtxp)
  102 #define UIDINFO_UNLOCK(ui)      mtx_unlock((ui)->ui_mtxp)
  103 
  104 struct thread;
  105 struct kse;
  106 struct proc;
  107 
  108 void     addupc_intr(struct kse *ke, uintptr_t pc, u_int ticks);
  109 void     addupc_task(struct kse *ke, uintptr_t pc, u_int ticks);
  110 void     calcru(struct proc *p, struct timeval *up, struct timeval *sp,
  111             struct timeval *ip);
  112 int      chgproccnt(struct uidinfo *uip, int diff, int max);
  113 int      chgsbsize(struct uidinfo *uip, u_int *hiwat, u_int to,
  114             rlim_t max);
  115 int      fuswintr(void *base);
  116 struct plimit
  117         *limcopy(struct plimit *lim);
  118 void     ruadd(struct rusage *ru, struct rusage *ru2);
  119 int      suswintr(void *base, int word);
  120 struct uidinfo
  121         *uifind(uid_t uid);
  122 void     uihold(struct uidinfo *uip);
  123 void     uifree(struct uidinfo *uip);
  124 void    uihashinit(void);
  125 #endif
  126 
  127 #endif  /* !_SYS_RESOURCEVAR_H_ */

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