FreeBSD/Linux Kernel Cross Reference
sys/sys/resourcevar.h
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: src/sys/sys/resourcevar.h,v 1.45.2.3 2005/03/01 09:30:19 obrien Exp $
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 */
53 struct 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 */
78 struct plimit {
79 struct rlimit pl_rlimit[RLIM_NLIMITS];
80 int pl_refcnt; /* number of references */
81 struct mtx *pl_mtx;
82 };
83
84 #define LIM_LOCK(lim) mtx_lock((lim)->pl_mtx)
85 #define LIM_UNLOCK(lim) mtx_unlock((lim)->pl_mtx)
86 #define LIM_LOCK_ASSERT(lim, f) mtx_assert((lim)->pl_mtx, (f))
87
88 /*-
89 * Per uid resource consumption
90 *
91 * Locking guide:
92 * (a) Constant from inception
93 * (b) Locked by ui_mtxp
94 * (c) Locked by global uihashtbl_mtx
95 */
96 struct uidinfo {
97 LIST_ENTRY(uidinfo) ui_hash; /* (c) hash chain of uidinfos */
98 rlim_t ui_sbsize; /* (b) socket buffer space consumed */
99 long ui_proccnt; /* (b) number of processes */
100 uid_t ui_uid; /* (a) uid */
101 u_int ui_ref; /* (b) reference count */
102 struct mtx *ui_mtxp; /* protect all counts/limits */
103 };
104
105 #define UIDINFO_LOCK(ui) mtx_lock((ui)->ui_mtxp)
106 #define UIDINFO_UNLOCK(ui) mtx_unlock((ui)->ui_mtxp)
107
108 struct proc;
109 struct thread;
110
111 void addupc_intr(struct thread *td, uintptr_t pc, u_int ticks);
112 void addupc_task(struct thread *td, uintptr_t pc, u_int ticks);
113 void calcru(struct proc *p, struct timeval *up, struct timeval *sp,
114 struct timeval *ip);
115 int chgproccnt(struct uidinfo *uip, int diff, int maxval);
116 int chgsbsize(struct uidinfo *uip, u_int *hiwat, u_int to,
117 rlim_t maxval);
118 int fuswintr(void *base);
119 struct plimit
120 *lim_alloc(void);
121 void lim_copy(struct plimit *dst, struct plimit *src);
122 rlim_t lim_cur(struct proc *p, int which);
123 void lim_free(struct plimit *limp);
124 struct plimit
125 *lim_hold(struct plimit *limp);
126 rlim_t lim_max(struct proc *p, int which);
127 void lim_rlimit(struct proc *p, int which, struct rlimit *rlp);
128 void ruadd(struct rusage *ru, struct rusage *ru2);
129 int suswintr(void *base, int word);
130 struct uidinfo
131 *uifind(uid_t uid);
132 void uifree(struct uidinfo *uip);
133 void uihashinit(void);
134 void uihold(struct uidinfo *uip);
135
136 #endif /* _KERNEL */
137 #endif /* !_SYS_RESOURCEVAR_H_ */
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