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. 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 1.16.2.1 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 $ 32 */ 33 34 #ifndef _SYS_RESOURCEVAR_H_ 35 #define _SYS_RESOURCEVAR_H_ 36 37 #ifndef _SYS_TYPES_H_ 38 #include <sys/types.h> 39 #endif 40 #ifndef _SYS_RESOURCE_H_ 41 #include <sys/resource.h> 42 #endif 43 #ifndef _SYS_QUEUE_H_ 44 #include <sys/queue.h> 45 #endif 46 #ifndef _SYS_VARSYM_H_ 47 #include <sys/varsym.h> 48 #endif 49 #ifndef _SYS_TIME_H_ 50 #include <sys/time.h> 51 #endif 52 #ifndef _SYS_SPINLOCK_H_ 53 #include <sys/spinlock.h> 54 #endif 55 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 */ 63 }; 64 65 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 66 67 /* 68 * For krateprintf() 69 */ 70 struct krate { 71 int freq; 72 int ticks; 73 int count; 74 }; 75 76 /* 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. 80 * 81 * Threaded programs cache p_limit in the thread structure, allowing 82 * lockless read access. 83 * 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. 88 */ 89 struct plimit { 90 struct rlimit pl_rlimit[RLIM_NLIMITS]; 91 rlim_t p_cpulimit; /* current cpu limit in usec */ 92 struct { 93 struct spinlock p_spin; /* protect modifications */ 94 uint32_t p_refcnt; /* refs & exclusivity */ 95 } __cachealign; 96 } __cachealign; 97 98 #define PLIMITF_EXCLUSIVE 0x80000000U 99 #define PLIMITF_MASK 0x7FFFFFFFU 100 101 #define PLIMIT_TESTCPU_OK 0 102 #define PLIMIT_TESTCPU_XCPU 1 103 #define PLIMIT_TESTCPU_KILL 2 104 105 /* 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 110 * line ping-ponging) 111 */ 112 struct uidcount { 113 int pu_posixlocks; 114 int pu_openfiles; 115 } __cachealign; 116 117 #define PUP_LIMIT 32 /* +/-32 rollup */ 118 119 /* 120 * Per uid resource consumption 121 * 122 * There typically aren't too many uidinfo's, so shove the ref count 123 * out of the way with a __cachealign. 124 */ 125 struct uidinfo { 126 /* 127 * Protects access to ui_sbsize, ui_proccnt, ui_posixlocks 128 */ 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; 137 struct { 138 struct spinlock ui_lock;/* not currently used (FUTURE) */ 139 int ui_ref; /* reference count */ 140 } __cachealign; 141 }; 142 143 #endif 144 145 #ifdef _KERNEL 146 147 struct proc; 148 struct lwp; 149 150 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); 163 164 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 *); 171 172 #endif 173 174 #endif /* !_SYS_RESOURCEVAR_H_ */ 175