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/5.2/sys/sys/resourcevar.h 121636 2003-10-28 20:46:23Z 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         struct  itimerval p_timer[3];   /* virtual-time timers */
   56 #define pstat_endzero   pstat_startcopy
   57 
   58 #define pstat_startcopy p_prof
   59         struct uprof {                  /* profile arguments */
   60                 caddr_t pr_base;        /* buffer base */
   61                 u_long  pr_size;        /* buffer size */
   62                 u_long  pr_off;         /* pc offset */
   63                 u_long  pr_scale;       /* pc scaling */
   64                 u_long  pr_addr;        /* temp storage for addr until AST */
   65                 u_int   pr_ticks;       /* temp storage for ticks until AST */
   66         } p_prof;
   67 #define pstat_endcopy   p_start
   68         struct  timeval p_start;        /* starting time */
   69 };
   70 
   71 /*
   72  * Kernel shareable process resource limits.  Because this structure
   73  * is moderately large but changes infrequently, it is normally
   74  * shared copy-on-write after forks.
   75  */
   76 struct plimit {
   77         struct  rlimit pl_rlimit[RLIM_NLIMITS];
   78         int     p_refcnt;               /* number of references */
   79 };
   80 
   81 #ifdef _KERNEL
   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_int   ui_ref;                 /* reference count */
   92         struct mtx      *ui_mtxp;       /* protect all counts/limits */
   93 };
   94 
   95 #define UIDINFO_LOCK(ui)        mtx_lock((ui)->ui_mtxp)
   96 #define UIDINFO_UNLOCK(ui)      mtx_unlock((ui)->ui_mtxp)
   97 
   98 struct thread;
   99 struct kse;
  100 struct proc;
  101 
  102 void     addupc_intr(struct thread *td, uintptr_t pc, u_int ticks);
  103 void     addupc_task(struct thread *td, uintptr_t pc, u_int ticks);
  104 void     calcru(struct proc *p, struct timeval *up, struct timeval *sp,
  105             struct timeval *ip);
  106 int      chgproccnt(struct uidinfo *uip, int diff, int max);
  107 int      chgsbsize(struct uidinfo *uip, u_int *hiwat, u_int to,
  108             rlim_t max);
  109 int      fuswintr(void *base);
  110 struct plimit
  111         *limcopy(struct plimit *lim);
  112 void     ruadd(struct rusage *ru, struct rusage *ru2);
  113 int      suswintr(void *base, int word);
  114 struct uidinfo
  115         *uifind(uid_t uid);
  116 void     uihold(struct uidinfo *uip);
  117 void     uifree(struct uidinfo *uip);
  118 void    uihashinit(void);
  119 #endif
  120 
  121 #endif  /* !_SYS_RESOURCEVAR_H_ */

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