2 * Copyright (c) 1991, 1993
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6 * modification, are permitted provided that the following conditions
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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-cpu tracking structure attached to uidinfo. These counts are only
107 * synchronized with the uidinfo rollup fields at +/-32. Resource limits
108 * only check against the ui_posixlocks and ui_openfiles so some slop
109 * is possible (checking against the pcpu structures would be cause cache
117 #define PUP_LIMIT 32 /* +/-32 rollup */
120 * Per uid resource consumption
122 * There typically aren't too many uidinfo's, so shove the ref count
123 * out of the way with a __cachealign.
127 * Protects access to ui_sbsize, ui_proccnt, ui_posixlocks
129 LIST_ENTRY(uidinfo
) ui_hash
;
130 rlim_t ui_sbsize
; /* socket buffer space consumed */
131 long ui_proccnt
; /* number of processes */
132 uid_t ui_uid
; /* uid */
133 int ui_posixlocks
; /* (rollup) number of POSIX locks */
134 int ui_openfiles
; /* (rollup) number of open files */
135 struct varsymset ui_varsymset
; /* variant symlinks */
136 struct uidcount
*ui_pcpu
;
138 struct spinlock ui_lock
;/* not currently used (FUTURE) */
139 int ui_ref
; /* reference count */
150 void addupc_intr (struct proc
*p
, u_long pc
, u_int ticks
);
151 void addupc_task (struct proc
*p
, u_long pc
, u_int ticks
);
152 void calcru (struct lwp
*lp
, struct timeval
*up
, struct timeval
*sp
);
153 void calcru_proc (struct proc
*p
, struct rusage
*ru
);
154 int chgproccnt (struct uidinfo
*uip
, int diff
, int max
);
155 int chgsbsize (struct uidinfo
*uip
, u_long
*hiwat
, u_long to
, rlim_t max
);
156 void ruadd (struct rusage
*ru
, struct rusage
*ru2
);
157 struct uidinfo
*uifind (uid_t uid
);
158 struct uidinfo
*uicreate(uid_t uid
);
159 void uihold (struct uidinfo
*uip
);
160 void uidrop (struct uidinfo
*uip
);
161 void uireplace (struct uidinfo
**puip
, struct uidinfo
*nuip
);
162 void uihashinit (void);
164 void plimit_init0(struct plimit
*);
165 struct plimit
*plimit_fork(struct proc
*);
166 u_int64_t
plimit_getadjvalue(int i
);
167 void plimit_lwp_fork(struct proc
*);
168 int plimit_testcpulimit(struct proc
*, u_int64_t
);
169 void plimit_modify(struct proc
*, int, struct rlimit
*);
170 void plimit_free(struct plimit
*);
174 #endif /* !_SYS_RESOURCEVAR_H_ */