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 * 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: src/sys/sys/resourcevar.h,v 1.16.2.1 2000/09/07 19:13:55 truckman Exp $
35 * $DragonFly: src/sys/sys/resourcevar.h,v 1.16 2008/05/08 01:26:01 dillon Exp $
36 */
37
38 #ifndef _SYS_RESOURCEVAR_H_
39 #define _SYS_RESOURCEVAR_H_
40
41 #ifndef _SYS_TYPES_H_
42 #include <sys/types.h>
43 #endif
44 #ifndef _SYS_RESOURCE_H_
45 #include <sys/resource.h>
46 #endif
47 #ifndef _SYS_QUEUE_H_
48 #include <sys/queue.h>
49 #endif
50 #ifndef _SYS_VARSYM_H_
51 #include <sys/varsym.h>
52 #endif
53 #ifndef _SYS_TIME_H_
54 #include <sys/time.h>
55 #endif
56 #ifndef _SYS_SPINLOCK_H_
57 #include <sys/spinlock.h>
58 #endif
59
60 struct uprof { /* profile arguments */
61 caddr_t pr_base; /* buffer base */
62 u_long pr_size; /* buffer size */
63 u_long pr_off; /* pc offset */
64 u_long pr_scale; /* pc scaling */
65 u_long pr_addr; /* temp storage for addr until AST */
66 u_long pr_ticks; /* temp storage for ticks until AST */
67 };
68
69 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
70
71 /*
72 * For krateprintf()
73 */
74 struct krate {
75 int freq;
76 int ticks;
77 int count;
78 };
79
80 /*
81 * Kernel shareable process resource limits. Because this structure
82 * is moderately large but changes infrequently, it is normally
83 * shared copy-on-write after forks.
84 *
85 * Threaded programs force p_exclusive (set it to 2) to prevent the
86 * proc->p_limit pointer from changing out from under threaded access.
87 */
88 struct plimit {
89 struct rlimit pl_rlimit[RLIM_NLIMITS];
90 int p_refcnt; /* number of references */
91 int p_exclusive; /* exclusive to proc due to lwp's */
92 rlim_t p_cpulimit; /* current cpu limit in usec */
93 struct spinlock p_spin;
94 };
95
96 #define PLIMIT_TESTCPU_OK 0
97 #define PLIMIT_TESTCPU_XCPU 1
98 #define PLIMIT_TESTCPU_KILL 2
99
100 /*
101 * Per uid resource consumption
102 */
103 struct uidinfo {
104 /*
105 * Protects access to ui_sbsize, ui_proccnt, ui_posixlocks
106 */
107 struct spinlock ui_lock;
108 LIST_ENTRY(uidinfo) ui_hash;
109 rlim_t ui_sbsize; /* socket buffer space consumed */
110 long ui_proccnt; /* number of processes */
111 uid_t ui_uid; /* uid */
112 int ui_ref; /* reference count */
113 int ui_posixlocks; /* number of POSIX locks */
114 int ui_openfiles; /* number of open files */
115 struct varsymset ui_varsymset; /* variant symlinks */
116 };
117
118 #endif
119
120 #ifdef _KERNEL
121
122 struct proc;
123 struct lwp;
124
125 void addupc_intr (struct proc *p, u_long pc, u_int ticks);
126 void addupc_task (struct proc *p, u_long pc, u_int ticks);
127 void calcru (struct lwp *lp, struct timeval *up, struct timeval *sp);
128 void calcru_proc (struct proc *p, struct rusage *ru);
129 int chgproccnt (struct uidinfo *uip, int diff, int max);
130 int chgsbsize (struct uidinfo *uip, u_long *hiwat, u_long to, rlim_t max);
131 void ruadd (struct rusage *ru, struct rusage *ru2);
132 struct uidinfo *uifind (uid_t uid);
133 void uihold (struct uidinfo *uip);
134 void uidrop (struct uidinfo *uip);
135 void uireplace (struct uidinfo **puip, struct uidinfo *nuip);
136 void uihashinit (void);
137
138 void plimit_init0(struct plimit *);
139 struct plimit *plimit_fork(struct proc *);
140 void plimit_lwp_fork(struct proc *);
141 int plimit_testcpulimit(struct plimit *, u_int64_t);
142 void plimit_modify(struct proc *, int, struct rlimit *);
143 void plimit_free(struct proc *);
144
145 #endif
146
147 #endif /* !_SYS_RESOURCEVAR_H_ */
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