2 * Copyright (c) 1991, 1993
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29 * @(#)resourcevar.h 8.4 (Berkeley) 1/9/95
30 * $FreeBSD: src/sys/sys/resourcevar.h,v 1.16.2.1 2000/09/07 19:13:55 truckman Exp $
31 * $DragonFly: src/sys/sys/resourcevar.h,v 1.16 2008/05/08 01:26:01 dillon Exp $
34 #ifndef _SYS_RESOURCEVAR_H_
35 #define _SYS_RESOURCEVAR_H_
38 #include <sys/types.h>
40 #ifndef _SYS_RESOURCE_H_
41 #include <sys/resource.h>
44 #include <sys/queue.h>
46 #ifndef _SYS_VARSYM_H_
47 #include <sys/varsym.h>
52 #ifndef _SYS_SPINLOCK_H_
53 #include <sys/spinlock.h>
56 struct uprof { /* profile arguments */
57 caddr_t pr_base; /* buffer base */
58 u_long pr_size; /* buffer size */
59 u_long pr_off; /* pc offset */
60 u_long pr_scale; /* pc scaling */
61 u_long pr_addr; /* temp storage for addr until AST */
62 u_long pr_ticks; /* temp storage for ticks until AST */
65 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES)
77 * Kernel shareable process resource limits. Because this structure
78 * is moderately large but changes infrequently, it is normally
79 * shared copy-on-write after forks.
81 * Threaded programs cache p_limit in the thread structure, allowing
82 * lockless read access.
84 * p_refcnt can change often, don't force cache mastership changes for
85 * the rest of the (usually read only) data structure. Place p_refcnt
86 * in its own cache line. The rest of the structure is stable as long
87 * as the caller has a ref.
90 struct rlimit pl_rlimit[RLIM_NLIMITS];
91 rlim_t p_cpulimit; /* current cpu limit in usec */
93 struct spinlock p_spin; /* protect modifications */
94 uint32_t p_refcnt; /* refs & exclusivity */
98 #define PLIMITF_EXCLUSIVE 0x80000000U
99 #define PLIMITF_MASK 0x7FFFFFFFU
101 #define PLIMIT_TESTCPU_OK 0
102 #define PLIMIT_TESTCPU_XCPU 1
103 #define PLIMIT_TESTCPU_KILL 2
106 * Per uid resource consumption
110 * Protects access to ui_sbsize, ui_proccnt, ui_posixlocks
112 struct spinlock ui_lock; /* not currently used (FUTURE) */
113 LIST_ENTRY(uidinfo) ui_hash;
114 rlim_t ui_sbsize; /* socket buffer space consumed */
115 long ui_proccnt; /* number of processes */
116 uid_t ui_uid; /* uid */
117 int ui_ref; /* reference count */
118 int ui_posixlocks; /* number of POSIX locks */
119 int ui_openfiles; /* number of open files */
120 struct varsymset ui_varsymset; /* variant symlinks */
130 void addupc_intr (struct proc *p, u_long pc, u_int ticks);
131 void addupc_task (struct proc *p, u_long pc, u_int ticks);
132 void calcru (struct lwp *lp, struct timeval *up, struct timeval *sp);
133 void calcru_proc (struct proc *p, struct rusage *ru);
134 int chgproccnt (struct uidinfo *uip, int diff, int max);
135 int chgsbsize (struct uidinfo *uip, u_long *hiwat, u_long to, rlim_t max);
136 void ruadd (struct rusage *ru, struct rusage *ru2);
137 struct uidinfo *uifind (uid_t uid);
138 struct uidinfo *uicreate(uid_t uid);
139 void uihold (struct uidinfo *uip);
140 void uidrop (struct uidinfo *uip);
141 void uireplace (struct uidinfo **puip, struct uidinfo *nuip);
142 void uihashinit (void);
144 void plimit_init0(struct plimit *);
145 struct plimit *plimit_fork(struct proc *);
146 u_int64_t plimit_getadjvalue(int i);
147 void plimit_lwp_fork(struct proc *);
148 int plimit_testcpulimit(struct proc *, u_int64_t);
149 void plimit_modify(struct proc *, int, struct rlimit *);
150 void plimit_free(struct plimit *);
154 #endif /* !_SYS_RESOURCEVAR_H_ */