resourcevar.h revision 150633 
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 150633 2005-09-27 18:07:05Z jhb $
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 sched_lock mtx
51 *      k - only accessed by curthread
52 */
53struct pstats {
54#define	pstat_startzero	p_ru
55	struct	rusage p_ru;		/* Stats for this process. */
56	struct	rusage p_cru;		/* Stats for reaped children. */
57	struct	itimerval p_timer[3];	/* (j) 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 + j) Buffer base. */
63		u_long	pr_size;	/* (c + j) Buffer size. */
64		u_long	pr_off;		/* (c + j) PC offset. */
65		u_long	pr_scale;	/* (c + j) 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
83/*-
84 * Per uid resource consumption
85 *
86 * Locking guide:
87 * (a) Constant from inception
88 * (b) Locked by ui_mtxp
89 * (c) Locked by global uihashtbl_mtx
90 */
91struct uidinfo {
92	LIST_ENTRY(uidinfo) ui_hash;	/* (c) hash chain of uidinfos */
93	rlim_t	ui_sbsize;		/* (b) socket buffer space consumed */
94	long	ui_proccnt;		/* (b) number of processes */
95	uid_t	ui_uid;			/* (a) uid */
96	u_int	ui_ref;			/* (b) reference count */
97	struct mtx *ui_mtxp;		/* protect all counts/limits */
98};
99
100#define	UIDINFO_LOCK(ui)	mtx_lock((ui)->ui_mtxp)
101#define	UIDINFO_UNLOCK(ui)	mtx_unlock((ui)->ui_mtxp)
102
103struct proc;
104struct rusage_ext;
105struct thread;
106
107void	 addupc_intr(struct thread *td, uintptr_t pc, u_int ticks);
108void	 addupc_task(struct thread *td, uintptr_t pc, u_int ticks);
109void	 calccru(struct proc *p, struct timeval *up, struct timeval *sp);
110void	 calcru(struct proc *p, struct timeval *up, struct timeval *sp);
111int	 chgproccnt(struct uidinfo *uip, int diff, int maxval);
112int	 chgsbsize(struct uidinfo *uip, u_int *hiwat, u_int to,
113	    rlim_t maxval);
114int	 fuswintr(void *base);
115struct plimit
116	*lim_alloc(void);
117void	 lim_copy(struct plimit *dst, struct plimit *src);
118rlim_t	 lim_cur(struct proc *p, int which);
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);
126int	 suswintr(void *base, int word);
127struct uidinfo
128	*uifind(uid_t uid);
129void	 uifree(struct uidinfo *uip);
130void	 uihashinit(void);
131void	 uihold(struct uidinfo *uip);
132
133#endif /* _KERNEL */
134#endif /* !_SYS_RESOURCEVAR_H_ */
135