resourcevar.h revision 125454 
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 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	@(#)resourcevar.h	8.4 (Berkeley) 1/9/95
34 * $FreeBSD: head/sys/sys/resourcevar.h 125454 2004-02-04 21:52:57Z jhb $
35 */
36
37#ifndef	_SYS_RESOURCEVAR_H_
38#define	_SYS_RESOURCEVAR_H_
39
40#include <sys/resource.h>
41#include <sys/queue.h>
42#ifdef _KERNEL
43#include <sys/_lock.h>
44#include <sys/_mutex.h>
45#endif
46
47/*
48 * Kernel per-process accounting / statistics
49 * (not necessarily resident except when running).
50 */
51struct pstats {
52#define	pstat_startzero	p_ru
53	struct	rusage p_ru;		/* stats for this proc */
54	struct	rusage p_cru;		/* sum of stats for reaped children */
55	struct	itimerval p_timer[3];	/* virtual-time timers */
56#define	pstat_endzero	pstat_startcopy
57
58#define	pstat_startcopy	p_prof
59	struct uprof {			/* profile arguments */
60		caddr_t	pr_base;	/* buffer base */
61		u_long	pr_size;	/* buffer size */
62		u_long	pr_off;		/* pc offset */
63		u_long	pr_scale;	/* pc scaling */
64		u_long	pr_addr;	/* temp storage for addr until AST */
65		u_int	pr_ticks;	/* temp storage for ticks until AST */
66	} p_prof;
67#define	pstat_endcopy	p_start
68	struct	timeval p_start;	/* starting time */
69};
70
71/*
72 * Kernel shareable process resource limits.  Because this structure
73 * is moderately large but changes infrequently, it is normally
74 * shared copy-on-write after forks.
75 */
76struct plimit {
77	struct	rlimit pl_rlimit[RLIM_NLIMITS];
78	int	pl_refcnt;		/* number of references */
79	struct	mtx pl_mtx;
80};
81
82#ifdef _KERNEL
83
84/*
85 * Lock order for operations involving the plimit lock:
86 *      filedesc  <important to avoid deadlocks in the descriptor code>
87 *      proc
88 *      plimit
89 */
90#define LIM_LOCK(lim)		mtx_lock(&(lim)->pl_mtx)
91#define LIM_UNLOCK(lim)		mtx_unlock(&(lim)->pl_mtx)
92#define LIM_LOCK_ASSERT(lim, f)	mtx_assert(&(lim)->pl_mtx, (f))
93
94/*
95 * Per uid resource consumption
96 */
97struct uidinfo {
98	LIST_ENTRY(uidinfo) ui_hash;
99	rlim_t	ui_sbsize;		/* socket buffer space consumed */
100	long	ui_proccnt;		/* number of processes */
101	uid_t	ui_uid;			/* uid */
102	u_int	ui_ref;			/* reference count */
103	struct mtx	*ui_mtxp;	/* protect all counts/limits */
104};
105
106#define	UIDINFO_LOCK(ui)	mtx_lock((ui)->ui_mtxp)
107#define	UIDINFO_UNLOCK(ui)	mtx_unlock((ui)->ui_mtxp)
108
109struct thread;
110struct kse;
111struct proc;
112
113void	 addupc_intr(struct thread *td, uintptr_t pc, u_int ticks);
114void	 addupc_task(struct thread *td, uintptr_t pc, u_int ticks);
115void	 calcru(struct proc *p, struct timeval *up, struct timeval *sp,
116	    struct timeval *ip);
117int	 chgproccnt(struct uidinfo *uip, int diff, int max);
118int	 chgsbsize(struct uidinfo *uip, u_int *hiwat, u_int to,
119	    rlim_t max);
120int	 fuswintr(void *base);
121rlim_t	 lim_cur(struct proc *p, int which);
122rlim_t	 lim_max(struct proc *p, int which);
123void	 lim_rlimit(struct proc *p, int which, struct rlimit *rlp);
124void	 lim_copy(struct plimit *dst, struct plimit *src);
125void	 lim_free(struct plimit *limp);
126struct plimit
127	*lim_alloc(void);
128struct plimit
129	*lim_hold(struct plimit *limp);
130void	 ruadd(struct rusage *ru, struct rusage *ru2);
131int	 suswintr(void *base, int word);
132struct uidinfo
133	*uifind(uid_t uid);
134void	 uihold(struct uidinfo *uip);
135void	 uifree(struct uidinfo *uip);
136void	uihashinit(void);
137#endif
138
139#endif	/* !_SYS_RESOURCEVAR_H_ */
140