/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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. 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
* $FreeBSD$
*/
#ifndef _SYS_RESOURCEVAR_H_
#define _SYS_RESOURCEVAR_H_
#include <sys/resource.h>
#include <sys/queue.h>
#ifdef _KERNEL
#include <sys/_lock.h>
#include <sys/_mutex.h>
#endif
/*
* Kernel per-process accounting / statistics
* (not necessarily resident except when running).
*
* Locking key:
* b - created at fork, never changes
* c - locked by proc mtx
* k - only accessed by curthread
* w - locked by proc itim lock
* w2 - locked by proc prof lock
*/
struct pstats {
#define pstat_startzero p_cru
struct rusage p_cru; /* Stats for reaped children. */
struct itimerval p_timer[3]; /* (w) Virtual-time timers. */
#define pstat_endzero pstat_startcopy
#define pstat_startcopy p_prof
struct uprof { /* Profile arguments. */
caddr_t pr_base; /* (c + w2) Buffer base. */
u_long pr_size; /* (c + w2) Buffer size. */
u_long pr_off; /* (c + w2) PC offset. */
u_long pr_scale; /* (c + w2) PC scaling. */
} p_prof;
#define pstat_endcopy p_start
struct timeval p_start; /* (b) Starting time. */
};
#ifdef _KERNEL
/*
* Kernel shareable process resource limits. Because this structure
* is moderately large but changes infrequently, it is normally
* shared copy-on-write after forks.
*/
struct plimit {
struct rlimit pl_rlimit[RLIM_NLIMITS];
int pl_refcnt; /* number of references */
};
struct racct;
/*-
* Per uid resource consumption. This structure is used to track
* the total resource consumption (process count, socket buffer size,
* etc) for the uid and impose limits.
*
* Locking guide:
* (a) Constant from inception
* (b) Lockless, updated using atomics
* (c) Locked by global uihashtbl_lock
*/
struct uidinfo {
LIST_ENTRY(uidinfo) ui_hash; /* (c) hash chain of uidinfos */
u_long ui_vmsize; /* (b) pages of swap reservation by uid */
long ui_sbsize; /* (b) socket buffer space consumed */
long ui_proccnt; /* (b) number of processes */
long ui_ptscnt; /* (b) number of pseudo-terminals */
long ui_kqcnt; /* (b) number of kqueues */
long ui_umtxcnt; /* (b) number of shared umtxs */
uid_t ui_uid; /* (a) uid */
u_int ui_ref; /* (b) reference count */
#ifdef RACCT
struct racct *ui_racct; /* (a) resource accounting */
#endif
};
struct proc;
struct rusage_ext;
struct thread;
void addupc_intr(struct thread *td, uintfptr_t pc, u_int ticks);
void addupc_task(struct thread *td, uintfptr_t pc, u_int ticks);
void calccru(struct proc *p, struct timeval *up, struct timeval *sp);
void calcru(struct proc *p, struct timeval *up, struct timeval *sp);
int chgkqcnt(struct uidinfo *uip, int diff, rlim_t max);
int chgproccnt(struct uidinfo *uip, int diff, rlim_t maxval);
int chgsbsize(struct uidinfo *uip, u_int *hiwat, u_int to,
rlim_t maxval);
int chgptscnt(struct uidinfo *uip, int diff, rlim_t maxval);
int chgumtxcnt(struct uidinfo *uip, int diff, rlim_t maxval);
int kern_proc_setrlimit(struct thread *td, struct proc *p, u_int which,
struct rlimit *limp);
struct plimit
*lim_alloc(void);
void lim_copy(struct plimit *dst, struct plimit *src);
rlim_t lim_cur(struct thread *td, int which);
#define lim_cur(td, which) ({ \
rlim_t _rlim; \
struct thread *_td = (td); \
int _which = (which); \
if (__builtin_constant_p(which) && which != RLIMIT_DATA && \
which != RLIMIT_STACK && which != RLIMIT_VMEM) { \
_rlim = td->td_limit->pl_rlimit[which].rlim_cur; \
} else { \
_rlim = lim_cur(_td, _which); \
} \
_rlim; \
})
rlim_t lim_cur_proc(struct proc *p, int which);
void lim_fork(struct proc *p1, struct proc *p2);
void lim_free(struct plimit *limp);
void lim_freen(struct plimit *limp, int n);
struct plimit
*lim_hold(struct plimit *limp);
rlim_t lim_max(struct thread *td, int which);
rlim_t lim_max_proc(struct proc *p, int which);
void lim_rlimit(struct thread *td, int which, struct rlimit *rlp);
void lim_rlimit_proc(struct proc *p, int which, struct rlimit *rlp);
void ruadd(struct rusage *ru, struct rusage_ext *rux, struct rusage *ru2,
struct rusage_ext *rux2);
void rucollect(struct rusage *ru, struct rusage *ru2);
void rufetch(struct proc *p, struct rusage *ru);
void rufetchcalc(struct proc *p, struct rusage *ru, struct timeval *up,
struct timeval *sp);
void rufetchtd(struct thread *td, struct rusage *ru);
void ruxagg(struct proc *p, struct thread *td);
void ruxagg_locked(struct proc *p, struct thread *td);
struct uidinfo
*uifind(uid_t uid);
void uifree(struct uidinfo *uip);
void uihashinit(void);
void uihold(struct uidinfo *uip);
#ifdef RACCT
void ui_racct_foreach(void (*callback)(struct racct *racct,
void *arg2, void *arg3), void (*pre)(void), void (*post)(void),
void *arg2, void *arg3);
#endif
#endif /* _KERNEL */
#endif /* !_SYS_RESOURCEVAR_H_ */
