1 /*- 2 * Copyright (c) 2010 The FreeBSD Foundation 3 * All rights reserved. 4 * 5 * This software was developed by Edward Tomasz Napierala under sponsorship 6 * from the FreeBSD Foundation. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 * $FreeBSD: stable/10/sys/sys/racct.h 299616 2016-05-13 08:17:42Z ngie $ 30 */ 31 32 /* 33 * Resource accounting. 34 */ 35 36 #ifndef _RACCT_H_ 37 #define _RACCT_H_ 38 39 #include <sys/cdefs.h> 40 #include <sys/queue.h> 41 #include <sys/types.h> 42 43 struct proc; 44 struct rctl_rule_link; 45 struct ucred; 46 47 /* 48 * Resources. 49 */ 50 #define RACCT_UNDEFINED -1 51 #define RACCT_CPU 0 52 #define RACCT_DATA 1 53 #define RACCT_STACK 2 54 #define RACCT_CORE 3 55 #define RACCT_RSS 4 56 #define RACCT_MEMLOCK 5 57 #define RACCT_NPROC 6 58 #define RACCT_NOFILE 7 59 #define RACCT_VMEM 8 60 #define RACCT_NPTS 9 61 #define RACCT_SWAP 10 62 #define RACCT_NTHR 11 63 #define RACCT_MSGQQUEUED 12 64 #define RACCT_MSGQSIZE 13 65 #define RACCT_NMSGQ 14 66 #define RACCT_NSEM 15 67 #define RACCT_NSEMOP 16 68 #define RACCT_NSHM 17 69 #define RACCT_SHMSIZE 18 70 #define RACCT_WALLCLOCK 19 71 #define RACCT_PCTCPU 20 72 #define RACCT_MAX RACCT_PCTCPU 73 74 /* 75 * Resource properties. 76 */ 77 #define RACCT_IN_MILLIONS 0x01 78 #define RACCT_RECLAIMABLE 0x02 79 #define RACCT_INHERITABLE 0x04 80 #define RACCT_DENIABLE 0x08 81 #define RACCT_SLOPPY 0x10 82 #define RACCT_DECAYING 0x20 83 84 extern int racct_types[]; 85 extern int racct_enable; 86 87 #define ASSERT_RACCT_ENABLED() KASSERT(racct_enable, \ 88 ("%s called with !racct_enable", __func__)) 89 90 /* 91 * Amount stored in c_resources[] is 10**6 times bigger than what's 92 * visible to the userland. It gets fixed up when retrieving resource 93 * usage or adding rules. 94 */ 95 #define RACCT_IS_IN_MILLIONS(X) \ 96 ((X) != RACCT_UNDEFINED && (racct_types[(X)] & RACCT_IN_MILLIONS) != 0) 97 98 /* 99 * Resource usage can drop, as opposed to only grow. When the process 100 * terminates, its resource usage is freed from the respective 101 * per-credential racct containers. 102 */ 103 #define RACCT_IS_RECLAIMABLE(X) (racct_types[X] & RACCT_RECLAIMABLE) 104 105 /* 106 * Children inherit resource usage. 107 */ 108 #define RACCT_IS_INHERITABLE(X) (racct_types[X] & RACCT_INHERITABLE) 109 110 /* 111 * racct_{add,set}(9) can actually return an error and not update resource 112 * usage counters. Note that even when resource is not deniable, allocating 113 * resource might cause signals to be sent by RCTL code. 114 */ 115 #define RACCT_IS_DENIABLE(X) (racct_types[X] & RACCT_DENIABLE) 116 117 /* 118 * Per-process resource usage information makes no sense, but per-credential 119 * one does. This kind of resources are usually allocated for process, but 120 * freed using credentials. 121 */ 122 #define RACCT_IS_SLOPPY(X) (racct_types[X] & RACCT_SLOPPY) 123 124 /* 125 * When a process terminates, its resource usage is not automatically 126 * subtracted from per-credential racct containers. Instead, the resource 127 * usage of per-credential racct containers decays in time. 128 * Resource usage can olso drop for such resource. 129 * So far, the only such resource is RACCT_PCTCPU. 130 */ 131 #define RACCT_IS_DECAYING(X) (racct_types[X] & RACCT_DECAYING) 132 133 /* 134 * Resource usage can drop, as opposed to only grow. 135 */ 136 #define RACCT_CAN_DROP(X) (RACCT_IS_RECLAIMABLE(X) | RACCT_IS_DECAYING(X)) 137 138 /* 139 * The 'racct' structure defines resource consumption for a particular 140 * subject, such as process or jail. 141 * 142 * This structure must be filled with zeroes initially. 143 */ 144 struct racct { 145 int64_t r_resources[RACCT_MAX + 1]; 146 LIST_HEAD(, rctl_rule_link) r_rule_links; 147 }; 148 149 int racct_add(struct proc *p, int resource, uint64_t amount); 150 void racct_add_cred(struct ucred *cred, int resource, uint64_t amount); 151 void racct_add_force(struct proc *p, int resource, uint64_t amount); 152 int racct_set(struct proc *p, int resource, uint64_t amount); 153 void racct_set_force(struct proc *p, int resource, uint64_t amount); 154 void racct_sub(struct proc *p, int resource, uint64_t amount); 155 void racct_sub_cred(struct ucred *cred, int resource, uint64_t amount); 156 uint64_t racct_get_limit(struct proc *p, int resource); 157 uint64_t racct_get_available(struct proc *p, int resource); 158 159 void racct_create(struct racct **racctp); 160 void racct_destroy(struct racct **racctp); 161 162 int racct_proc_fork(struct proc *parent, struct proc *child); 163 void racct_proc_fork_done(struct proc *child); 164 void racct_proc_exit(struct proc *p); 165 166 void racct_proc_ucred_changed(struct proc *p, struct ucred *oldcred, 167 struct ucred *newcred); 168 void racct_move(struct racct *dest, struct racct *src); 169 170 #endif /* !_RACCT_H_ */ 171