resourcevar.h revision 290861
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 290861 2015-11-15 12:50:14Z trasz $ 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 * k - only accessed by curthread 51 * w - locked by proc itim lock 52 * w2 - locked by proc prof lock 53 */ 54struct pstats { 55#define pstat_startzero p_cru 56 struct rusage p_cru; /* Stats for reaped children. */ 57 struct itimerval p_timer[3]; /* (w) Virtual-time timers. */ 58#define pstat_endzero pstat_startcopy 59 60#define pstat_startcopy p_prof 61 struct uprof { /* Profile arguments. */ 62 caddr_t pr_base; /* (c + w2) Buffer base. */ 63 u_long pr_size; /* (c + w2) Buffer size. */ 64 u_long pr_off; /* (c + w2) PC offset. */ 65 u_long pr_scale; /* (c + w2) PC scaling. */ 66 } p_prof; 67#define pstat_endcopy p_start 68 struct timeval p_start; /* (b) Starting time. */ 69}; 70 71#ifdef _KERNEL 72 73/* 74 * Kernel shareable process resource limits. Because this structure 75 * is moderately large but changes infrequently, it is normally 76 * shared copy-on-write after forks. 77 */ 78struct plimit { 79 struct rlimit pl_rlimit[RLIM_NLIMITS]; 80 int pl_refcnt; /* number of references */ 81}; 82 83struct racct; 84 85/*- 86 * Per uid resource consumption. This structure is used to track 87 * the total resource consumption (process count, socket buffer size, 88 * etc) for the uid and impose limits. 89 * 90 * Locking guide: 91 * (a) Constant from inception 92 * (b) Lockless, updated using atomics 93 * (c) Locked by global uihashtbl_lock 94 * (d) Locked by the ui_vmsize_mtx 95 */ 96struct uidinfo { 97 LIST_ENTRY(uidinfo) ui_hash; /* (c) hash chain of uidinfos */ 98 struct mtx ui_vmsize_mtx; 99 vm_ooffset_t ui_vmsize; /* (d) swap reservation by uid */ 100 long ui_sbsize; /* (b) socket buffer space consumed */ 101 long ui_proccnt; /* (b) number of processes */ 102 long ui_ptscnt; /* (b) number of pseudo-terminals */ 103 long ui_kqcnt; /* (b) number of kqueues */ 104 uid_t ui_uid; /* (a) uid */ 105 u_int ui_ref; /* (b) reference count */ 106#ifdef RACCT 107 struct racct *ui_racct; /* (a) resource accounting */ 108#endif 109}; 110 111#define UIDINFO_VMSIZE_LOCK(ui) mtx_lock(&((ui)->ui_vmsize_mtx)) 112#define UIDINFO_VMSIZE_UNLOCK(ui) mtx_unlock(&((ui)->ui_vmsize_mtx)) 113 114struct proc; 115struct rusage_ext; 116struct thread; 117 118void addupc_intr(struct thread *td, uintfptr_t pc, u_int ticks); 119void addupc_task(struct thread *td, uintfptr_t pc, u_int ticks); 120void calccru(struct proc *p, struct timeval *up, struct timeval *sp); 121void calcru(struct proc *p, struct timeval *up, struct timeval *sp); 122int chgkqcnt(struct uidinfo *uip, int diff, rlim_t max); 123int chgproccnt(struct uidinfo *uip, int diff, rlim_t maxval); 124int chgsbsize(struct uidinfo *uip, u_int *hiwat, u_int to, 125 rlim_t maxval); 126int chgptscnt(struct uidinfo *uip, int diff, rlim_t maxval); 127int fuswintr(void *base); 128int kern_proc_setrlimit(struct thread *td, struct proc *p, u_int which, 129 struct rlimit *limp); 130struct plimit 131 *lim_alloc(void); 132void lim_copy(struct plimit *dst, struct plimit *src); 133rlim_t lim_cur(struct thread *td, int which); 134rlim_t lim_cur_proc(struct proc *p, int which); 135void lim_fork(struct proc *p1, struct proc *p2); 136void lim_free(struct plimit *limp); 137struct plimit 138 *lim_hold(struct plimit *limp); 139rlim_t lim_max(struct thread *td, int which); 140rlim_t lim_max_proc(struct proc *p, int which); 141void lim_rlimit(struct thread *td, int which, struct rlimit *rlp); 142void lim_rlimit_proc(struct proc *p, int which, struct rlimit *rlp); 143void ruadd(struct rusage *ru, struct rusage_ext *rux, struct rusage *ru2, 144 struct rusage_ext *rux2); 145void rucollect(struct rusage *ru, struct rusage *ru2); 146void rufetch(struct proc *p, struct rusage *ru); 147void rufetchcalc(struct proc *p, struct rusage *ru, struct timeval *up, 148 struct timeval *sp); 149void rufetchtd(struct thread *td, struct rusage *ru); 150void ruxagg(struct proc *p, struct thread *td); 151int suswintr(void *base, int word); 152struct uidinfo 153 *uifind(uid_t uid); 154void uifree(struct uidinfo *uip); 155void uihashinit(void); 156void uihold(struct uidinfo *uip); 157#ifdef RACCT 158void ui_racct_foreach(void (*callback)(struct racct *racct, 159 void *arg2, void *arg3), void (*pre)(void), void (*post)(void), 160 void *arg2, void *arg3); 161#endif 162 163#endif /* _KERNEL */ 164#endif /* !_SYS_RESOURCEVAR_H_ */ 165