resourcevar.h revision 170472
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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)resourcevar.h 8.4 (Berkeley) 1/9/95 30 * $FreeBSD: head/sys/sys/resourcevar.h 170472 2007-06-09 21:48:44Z attilio $ 31 */ 32 33#ifndef _SYS_RESOURCEVAR_H_ 34#define _SYS_RESOURCEVAR_H_ 35 36#include <sys/resource.h> 37#include <sys/queue.h> 38#ifdef _KERNEL 39#include <sys/_lock.h> 40#include <sys/_mutex.h> 41#endif 42 43/* 44 * Kernel per-process accounting / statistics 45 * (not necessarily resident except when running). 46 * 47 * Locking key: 48 * b - created at fork, never changes 49 * c - locked by proc mtx 50 * j - locked by proc slock 51 * k - only accessed by curthread 52 */ 53struct pstats { 54#define pstat_startzero p_cru 55 struct rusage p_cru; /* Stats for reaped children. */ 56 struct itimerval p_timer[3]; /* (j) Virtual-time timers. */ 57#define pstat_endzero pstat_startcopy 58 59#define pstat_startcopy p_prof 60 struct uprof { /* Profile arguments. */ 61 caddr_t pr_base; /* (c + j) Buffer base. */ 62 u_long pr_size; /* (c + j) Buffer size. */ 63 u_long pr_off; /* (c + j) PC offset. */ 64 u_long pr_scale; /* (c + j) PC scaling. */ 65 } p_prof; 66#define pstat_endcopy p_start 67 struct timeval p_start; /* (b) Starting time. */ 68}; 69 70#ifdef _KERNEL 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. 76 */ 77struct plimit { 78 struct rlimit pl_rlimit[RLIM_NLIMITS]; 79 int pl_refcnt; /* number of references */ 80}; 81 82/*- 83 * Per uid resource consumption 84 * 85 * Locking guide: 86 * (a) Constant from inception 87 * (b) Locked by ui_mtxp 88 * (c) Locked by global uihashtbl_mtx 89 */ 90struct uidinfo { 91 LIST_ENTRY(uidinfo) ui_hash; /* (c) hash chain of uidinfos */ 92 rlim_t ui_sbsize; /* (b) socket buffer space consumed */ 93 long ui_proccnt; /* (b) number of processes */ 94 uid_t ui_uid; /* (a) uid */ 95 u_int ui_ref; /* (b) reference count */ 96 struct mtx *ui_mtxp; /* protect all counts/limits */ 97}; 98 99#define UIDINFO_LOCK(ui) mtx_lock((ui)->ui_mtxp) 100#define UIDINFO_UNLOCK(ui) mtx_unlock((ui)->ui_mtxp) 101 102struct proc; 103struct rusage_ext; 104struct thread; 105 106void addupc_intr(struct thread *td, uintfptr_t pc, u_int ticks); 107void addupc_task(struct thread *td, uintfptr_t pc, u_int ticks); 108void calccru(struct proc *p, struct timeval *up, struct timeval *sp); 109void calcru(struct proc *p, struct timeval *up, struct timeval *sp); 110int chgproccnt(struct uidinfo *uip, int diff, int maxval); 111int chgsbsize(struct uidinfo *uip, u_int *hiwat, u_int to, 112 rlim_t maxval); 113int fuswintr(void *base); 114struct plimit 115 *lim_alloc(void); 116void lim_copy(struct plimit *dst, struct plimit *src); 117rlim_t lim_cur(struct proc *p, int which); 118void lim_fork(struct proc *p1, struct proc *p2); 119void lim_free(struct plimit *limp); 120struct plimit 121 *lim_hold(struct plimit *limp); 122rlim_t lim_max(struct proc *p, int which); 123void lim_rlimit(struct proc *p, int which, struct rlimit *rlp); 124void ruadd(struct rusage *ru, struct rusage_ext *rux, struct rusage *ru2, 125 struct rusage_ext *rux2); 126void rucollect(struct rusage *ru, struct rusage *ru2); 127void rufetch(struct proc *p, struct rusage *ru); 128void rufetchcalc(struct proc *p, struct rusage *ru, struct timeval *up, 129 struct timeval *sp); 130void ruxagg(struct rusage_ext *rux, struct thread *td); 131int suswintr(void *base, int word); 132struct uidinfo 133 *uifind(uid_t uid); 134void uifree(struct uidinfo *uip); 135void uihashinit(void); 136void uihold(struct uidinfo *uip); 137 138#endif /* _KERNEL */ 139#endif /* !_SYS_RESOURCEVAR_H_ */ 140