The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/sys/rctl.h

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    1 /*-
    2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
    3  *
    4  * Copyright (c) 2010 The FreeBSD Foundation
    5  * All rights reserved.
    6  *
    7  * This software was developed by Edward Tomasz Napierala under sponsorship
    8  * from the FreeBSD Foundation.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  * $FreeBSD: stable/12/sys/sys/rctl.h 326256 2017-11-27 15:01:59Z pfg $
   32  */
   33 
   34 /*
   35  * Resource Limits.
   36  */
   37 
   38 #ifndef _RCTL_H_
   39 #define _RCTL_H_
   40 
   41 #include <sys/cdefs.h>
   42 #include <sys/queue.h>
   43 #include <sys/types.h>
   44 #include <sys/_task.h>
   45 
   46 struct proc;
   47 struct uidinfo;
   48 struct loginclass;
   49 struct prison_racct;
   50 struct ucred;
   51 struct rctl_rule_link;
   52 
   53 #ifdef _KERNEL
   54 
   55 /*
   56  * Rules describe an action to be taken when conditions defined
   57  * in the rule are met.  There is no global list of rules; instead,
   58  * rules are linked to by the racct structures for all the subjects
   59  * they apply to - for example, a rule of type "user" is linked to the
   60  * appropriate struct uidinfo, and to all the processes of that user.
   61  *
   62  * 'rr_refcount' is equal to the number of rctl_rule_link structures
   63  * pointing to the rule.
   64  *
   65  * This structure must never change after being added, via rctl_rule_link
   66  * structures, to subjects.  In order to change a rule, add a new rule
   67  * and remove the previous one.
   68  */
   69 struct rctl_rule {
   70         int             rr_subject_type;
   71         union {
   72                 struct proc             *rs_proc;
   73                 struct uidinfo          *rs_uip;
   74                 struct loginclass       *rs_loginclass;
   75                 struct prison_racct     *rs_prison_racct;
   76         } rr_subject;
   77         int             rr_per;
   78         int             rr_resource;
   79         int             rr_action;
   80         int64_t         rr_amount;
   81         u_int           rr_refcount;
   82         struct task     rr_task;
   83 };
   84 
   85 /*
   86  * Allowed values for rr_subject_type and rr_per fields.
   87  */
   88 #define RCTL_SUBJECT_TYPE_UNDEFINED     -1
   89 #define RCTL_SUBJECT_TYPE_PROCESS       0x0000
   90 #define RCTL_SUBJECT_TYPE_USER          0x0001
   91 #define RCTL_SUBJECT_TYPE_LOGINCLASS    0x0003
   92 #define RCTL_SUBJECT_TYPE_JAIL          0x0004
   93 #define RCTL_SUBJECT_TYPE_MAX           RCTL_SUBJECT_TYPE_JAIL
   94 
   95 /*
   96  * Allowed values for rr_action field.
   97  */
   98 #define RCTL_ACTION_UNDEFINED           -1
   99 #define RCTL_ACTION_SIGHUP              SIGHUP
  100 #define RCTL_ACTION_SIGINT              SIGINT
  101 #define RCTL_ACTION_SIGQUIT             SIGQUIT
  102 #define RCTL_ACTION_SIGILL              SIGILL
  103 #define RCTL_ACTION_SIGTRAP             SIGTRAP
  104 #define RCTL_ACTION_SIGABRT             SIGABRT
  105 #define RCTL_ACTION_SIGEMT              SIGEMT
  106 #define RCTL_ACTION_SIGFPE              SIGFPE
  107 #define RCTL_ACTION_SIGKILL             SIGKILL
  108 #define RCTL_ACTION_SIGBUS              SIGBUS
  109 #define RCTL_ACTION_SIGSEGV             SIGSEGV
  110 #define RCTL_ACTION_SIGSYS              SIGSYS
  111 #define RCTL_ACTION_SIGPIPE             SIGPIPE
  112 #define RCTL_ACTION_SIGALRM             SIGALRM
  113 #define RCTL_ACTION_SIGTERM             SIGTERM
  114 #define RCTL_ACTION_SIGURG              SIGURG
  115 #define RCTL_ACTION_SIGSTOP             SIGSTOP
  116 #define RCTL_ACTION_SIGTSTP             SIGTSTP
  117 #define RCTL_ACTION_SIGCHLD             SIGCHLD
  118 #define RCTL_ACTION_SIGTTIN             SIGTTIN
  119 #define RCTL_ACTION_SIGTTOU             SIGTTOU
  120 #define RCTL_ACTION_SIGIO               SIGIO
  121 #define RCTL_ACTION_SIGXCPU             SIGXCPU
  122 #define RCTL_ACTION_SIGXFSZ             SIGXFSZ
  123 #define RCTL_ACTION_SIGVTALRM           SIGVTALRM
  124 #define RCTL_ACTION_SIGPROF             SIGPROF
  125 #define RCTL_ACTION_SIGWINCH            SIGWINCH
  126 #define RCTL_ACTION_SIGINFO             SIGINFO
  127 #define RCTL_ACTION_SIGUSR1             SIGUSR1
  128 #define RCTL_ACTION_SIGUSR2             SIGUSR2
  129 #define RCTL_ACTION_SIGTHR              SIGTHR
  130 #define RCTL_ACTION_SIGNAL_MAX          RCTL_ACTION_SIGTHR
  131 #define RCTL_ACTION_DENY                (RCTL_ACTION_SIGNAL_MAX + 1)
  132 #define RCTL_ACTION_LOG                 (RCTL_ACTION_SIGNAL_MAX + 2)
  133 #define RCTL_ACTION_DEVCTL              (RCTL_ACTION_SIGNAL_MAX + 3)
  134 #define RCTL_ACTION_THROTTLE            (RCTL_ACTION_SIGNAL_MAX + 4)
  135 #define RCTL_ACTION_MAX                 RCTL_ACTION_THROTTLE
  136 
  137 #define RCTL_AMOUNT_UNDEFINED           -1
  138 
  139 struct rctl_rule *rctl_rule_alloc(int flags);
  140 struct rctl_rule *rctl_rule_duplicate(const struct rctl_rule *rule, int flags);
  141 void    rctl_rule_acquire(struct rctl_rule *rule);
  142 void    rctl_rule_release(struct rctl_rule *rule);
  143 int     rctl_rule_add(struct rctl_rule *rule);
  144 int     rctl_rule_remove(struct rctl_rule *filter);
  145 int     rctl_enforce(struct proc *p, int resource, uint64_t amount);
  146 void    rctl_throttle_decay(struct racct *racct, int resource);
  147 int64_t rctl_pcpu_available(const struct proc *p);
  148 uint64_t rctl_get_limit(struct proc *p, int resource);
  149 uint64_t rctl_get_available(struct proc *p, int resource);
  150 const char *rctl_resource_name(int resource);
  151 void    rctl_proc_ucred_changed(struct proc *p, struct ucred *newcred);
  152 int     rctl_proc_fork(struct proc *parent, struct proc *child);
  153 void    rctl_racct_release(struct racct *racct);
  154 #else /* !_KERNEL */
  155 
  156 /*
  157  * Syscall interface.
  158  */
  159 __BEGIN_DECLS
  160 int     rctl_get_racct(const char *inbufp, size_t inbuflen, char *outbufp,
  161             size_t outbuflen);
  162 int     rctl_get_rules(const char *inbufp, size_t inbuflen, char *outbufp,
  163             size_t outbuflen);
  164 int     rctl_get_limits(const char *inbufp, size_t inbuflen, char *outbufp,
  165             size_t outbuflen);
  166 int     rctl_add_rule(const char *inbufp, size_t inbuflen, char *outbufp,
  167             size_t outbuflen);
  168 int     rctl_remove_rule(const char *inbufp, size_t inbuflen, char *outbufp,
  169             size_t outbuflen);
  170 __END_DECLS
  171 
  172 #endif /* !_KERNEL */
  173 
  174 #endif /* !_RCTL_H_ */

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