9110db818a
user. Kqueue now saves the ucred of the allocating thread, to correctly decrement the counter on close. Under some specific and not real-world use scenario for kqueue, it is possible for the kqueues to consume memory proportional to the square of the number of the filedescriptors available to the process. Limit allows administrator to prevent the abuse. This is kernel-mode side of the change, with the user-mode enabling commit following. Reported and tested by: pho Discussed with: jmg Sponsored by: The FreeBSD Foundation MFC after: 2 weeks
186 lines
5.1 KiB
C
186 lines
5.1 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)resource.h 8.4 (Berkeley) 1/9/95
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* $FreeBSD$
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*/
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#ifndef _SYS_RESOURCE_H_
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#define _SYS_RESOURCE_H_
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#include <sys/cdefs.h>
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#include <sys/_timeval.h>
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#include <sys/_types.h>
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/*
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* Process priority specifications to get/setpriority.
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*/
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#define PRIO_MIN -20
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#define PRIO_MAX 20
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#define PRIO_PROCESS 0
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#define PRIO_PGRP 1
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#define PRIO_USER 2
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/*
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* Resource utilization information.
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*
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* All fields are only modified by curthread and
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* no locks are required to read.
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*/
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#define RUSAGE_SELF 0
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#define RUSAGE_CHILDREN -1
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#define RUSAGE_THREAD 1
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struct rusage {
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struct timeval ru_utime; /* user time used */
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struct timeval ru_stime; /* system time used */
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long ru_maxrss; /* max resident set size */
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#define ru_first ru_ixrss
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long ru_ixrss; /* integral shared memory size */
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long ru_idrss; /* integral unshared data " */
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long ru_isrss; /* integral unshared stack " */
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long ru_minflt; /* page reclaims */
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long ru_majflt; /* page faults */
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long ru_nswap; /* swaps */
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long ru_inblock; /* block input operations */
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long ru_oublock; /* block output operations */
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long ru_msgsnd; /* messages sent */
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long ru_msgrcv; /* messages received */
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long ru_nsignals; /* signals received */
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long ru_nvcsw; /* voluntary context switches */
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long ru_nivcsw; /* involuntary " */
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#define ru_last ru_nivcsw
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};
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#if __BSD_VISIBLE
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struct __wrusage {
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struct rusage wru_self;
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struct rusage wru_children;
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};
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#endif
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/*
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* Resource limits
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*/
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#define RLIMIT_CPU 0 /* maximum cpu time in seconds */
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#define RLIMIT_FSIZE 1 /* maximum file size */
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#define RLIMIT_DATA 2 /* data size */
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#define RLIMIT_STACK 3 /* stack size */
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#define RLIMIT_CORE 4 /* core file size */
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#define RLIMIT_RSS 5 /* resident set size */
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#define RLIMIT_MEMLOCK 6 /* locked-in-memory address space */
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#define RLIMIT_NPROC 7 /* number of processes */
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#define RLIMIT_NOFILE 8 /* number of open files */
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#define RLIMIT_SBSIZE 9 /* maximum size of all socket buffers */
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#define RLIMIT_VMEM 10 /* virtual process size (incl. mmap) */
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#define RLIMIT_AS RLIMIT_VMEM /* standard name for RLIMIT_VMEM */
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#define RLIMIT_NPTS 11 /* pseudo-terminals */
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#define RLIMIT_SWAP 12 /* swap used */
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#define RLIMIT_KQUEUES 13 /* kqueues allocated */
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#define RLIM_NLIMITS 14 /* number of resource limits */
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#define RLIM_INFINITY ((rlim_t)(((uint64_t)1 << 63) - 1))
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/* XXX Missing: RLIM_SAVED_MAX, RLIM_SAVED_CUR */
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/*
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* Resource limit string identifiers
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*/
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#ifdef _RLIMIT_IDENT
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static const char *rlimit_ident[RLIM_NLIMITS] = {
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"cpu",
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"fsize",
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"data",
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"stack",
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"core",
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"rss",
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"memlock",
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"nproc",
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"nofile",
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"sbsize",
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"vmem",
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"npts",
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"swap",
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"kqueues",
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};
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#endif
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#ifndef _RLIM_T_DECLARED
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typedef __rlim_t rlim_t;
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#define _RLIM_T_DECLARED
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#endif
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struct rlimit {
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rlim_t rlim_cur; /* current (soft) limit */
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rlim_t rlim_max; /* maximum value for rlim_cur */
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};
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#if __BSD_VISIBLE
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struct orlimit {
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__int32_t rlim_cur; /* current (soft) limit */
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__int32_t rlim_max; /* maximum value for rlim_cur */
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};
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struct loadavg {
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__fixpt_t ldavg[3];
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long fscale;
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};
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#define CP_USER 0
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#define CP_NICE 1
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#define CP_SYS 2
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#define CP_INTR 3
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#define CP_IDLE 4
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#define CPUSTATES 5
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#endif /* __BSD_VISIBLE */
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#ifdef _KERNEL
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extern struct loadavg averunnable;
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void read_cpu_time(long *cp_time); /* Writes array of CPUSTATES */
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#else
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__BEGIN_DECLS
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/* XXX 2nd arg to [gs]etpriority() should be an id_t */
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int getpriority(int, int);
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int getrlimit(int, struct rlimit *);
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int getrusage(int, struct rusage *);
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int setpriority(int, int, int);
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int setrlimit(int, const struct rlimit *);
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__END_DECLS
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#endif /* _KERNEL */
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#endif /* !_SYS_RESOURCE_H_ */
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