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

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