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

     /*
      * Copyright (c) 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)resourcevar.h       8.4 (Berkeley) 1/9/95
     * $FreeBSD: src/sys/sys/resourcevar.h,v 1.16.2.1 2000/09/07 19:13:55 truckman Exp $
     * $DragonFly: src/sys/sys/resourcevar.h,v 1.16 2008/05/08 01:26:01 dillon Exp $
     */
    
    #ifndef _SYS_RESOURCEVAR_H_
    #define _SYS_RESOURCEVAR_H_
    
    #ifndef _SYS_TYPES_H_
    #include <sys/types.h>
    #endif
    #ifndef _SYS_RESOURCE_H_
    #include <sys/resource.h>
    #endif
    #ifndef _SYS_QUEUE_H_
    #include <sys/queue.h>
    #endif
    #ifndef _SYS_VARSYM_H_
    #include <sys/varsym.h>
    #endif
    #ifndef _SYS_TIME_H_
    #include <sys/time.h>
    #endif
    #ifndef _SYS_SPINLOCK_H_
    #include <sys/spinlock.h>
    #endif
    
    struct uprof {                  /* profile arguments */
            caddr_t pr_base;        /* buffer base */
            u_long  pr_size;        /* buffer size */
            u_long  pr_off;         /* pc offset */
            u_long  pr_scale;       /* pc scaling */
            u_long  pr_addr;        /* temp storage for addr until AST */
            u_long  pr_ticks;       /* temp storage for ticks until AST */
    };
    
    #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
    
    /*
     * For krateprintf()
     */
    struct krate {
            int freq;
            int ticks;
            int count;
    };
    
    /*
     * Kernel shareable process resource limits.  Because this structure
     * is moderately large but changes infrequently, it is normally
     * shared copy-on-write after forks.
     *
     * Threaded programs force p_exclusive (set it to 2) to prevent the
     * proc->p_limit pointer from changing out from under threaded access.
     */
    struct plimit {
            struct  rlimit pl_rlimit[RLIM_NLIMITS];
            int     p_refcnt;               /* number of references */
            int     p_exclusive;            /* exclusive to proc due to lwp's */
            rlim_t  p_cpulimit;             /* current cpu limit in usec */
            struct spinlock p_spin;
    };
    
    #define PLIMIT_TESTCPU_OK       0
    #define PLIMIT_TESTCPU_XCPU     1
    #define PLIMIT_TESTCPU_KILL     2
    
   /*
    * Per uid resource consumption
    */
   struct uidinfo {
           /*
            * Protects access to ui_sbsize, ui_proccnt, ui_posixlocks
            */
           struct spinlock ui_lock;
           LIST_ENTRY(uidinfo) ui_hash;
           rlim_t  ui_sbsize;              /* socket buffer space consumed */
           long    ui_proccnt;             /* number of processes */
           uid_t   ui_uid;                 /* uid */
           int     ui_ref;                 /* reference count */
           int     ui_posixlocks;          /* number of POSIX locks */
           int     ui_openfiles;           /* number of open files */
           struct varsymset ui_varsymset;  /* variant symlinks */
   };
   
   #endif
   
   #ifdef _KERNEL
   
   struct proc;
   struct lwp;
   
   void    addupc_intr (struct proc *p, u_long pc, u_int ticks);
   void    addupc_task (struct proc *p, u_long pc, u_int ticks);
   void    calcru (struct lwp *lp, struct timeval *up, struct timeval *sp);
   void    calcru_proc (struct proc *p, struct rusage *ru);
   int     chgproccnt (struct uidinfo *uip, int diff, int max);
   int     chgsbsize (struct uidinfo *uip, u_long *hiwat, u_long to, rlim_t max);
   void    ruadd (struct rusage *ru, struct rusage *ru2);
   struct uidinfo *uifind (uid_t uid);
   void    uihold (struct uidinfo *uip);
   void    uidrop (struct uidinfo *uip);
   void    uireplace (struct uidinfo **puip, struct uidinfo *nuip);
   void    uihashinit (void);
   
   void plimit_init0(struct plimit *);
   struct plimit *plimit_fork(struct proc *);
   void plimit_lwp_fork(struct proc *);
   int plimit_testcpulimit(struct plimit *, u_int64_t);
   void plimit_modify(struct proc *, int, struct rlimit *);
   void plimit_free(struct proc *);
   
   #endif
   
   #endif  /* !_SYS_RESOURCEVAR_H_ */

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