diff options
Diffstat (limited to 'contrib/bind9/lib/isc/unix/resource.c')
| -rw-r--r-- | contrib/bind9/lib/isc/unix/resource.c | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/contrib/bind9/lib/isc/unix/resource.c b/contrib/bind9/lib/isc/unix/resource.c deleted file mode 100644 index 703ec27..0000000 --- a/contrib/bind9/lib/isc/unix/resource.c +++ /dev/null @@ -1,204 +0,0 @@ -/* - * Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC") - * Copyright (C) 2000, 2001 Internet Software Consortium. - * - * Permission to use, copy, modify, and distribute this software for any - * purpose with or without fee is hereby granted, provided that the above - * copyright notice and this permission notice appear in all copies. - * - * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH - * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY - * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, - * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM - * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE - * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR - * PERFORMANCE OF THIS SOFTWARE. - */ - -/* $Id: resource.c,v 1.12 2004/03/05 05:11:46 marka Exp $ */ - -#include <config.h> - -#include <sys/types.h> -#include <sys/time.h> /* Required on some systems for <sys/resource.h>. */ -#include <sys/resource.h> - -#include <isc/platform.h> -#include <isc/resource.h> -#include <isc/result.h> -#include <isc/util.h> - -#include "errno2result.h" - -static isc_result_t -resource2rlim(isc_resource_t resource, int *rlim_resource) { - isc_result_t result = ISC_R_SUCCESS; - - switch (resource) { - case isc_resource_coresize: - *rlim_resource = RLIMIT_CORE; - break; - case isc_resource_cputime: - *rlim_resource = RLIMIT_CPU; - break; - case isc_resource_datasize: - *rlim_resource = RLIMIT_DATA; - break; - case isc_resource_filesize: - *rlim_resource = RLIMIT_FSIZE; - break; - case isc_resource_lockedmemory: -#ifdef RLIMIT_MEMLOCK - *rlim_resource = RLIMIT_MEMLOCK; -#else - result = ISC_R_NOTIMPLEMENTED; -#endif - break; - case isc_resource_openfiles: -#ifdef RLIMIT_NOFILE - *rlim_resource = RLIMIT_NOFILE; -#else - result = ISC_R_NOTIMPLEMENTED; -#endif - break; - case isc_resource_processes: -#ifdef RLIMIT_NPROC - *rlim_resource = RLIMIT_NPROC; -#else - result = ISC_R_NOTIMPLEMENTED; -#endif - break; - case isc_resource_residentsize: -#ifdef RLIMIT_RSS - *rlim_resource = RLIMIT_RSS; -#else - result = ISC_R_NOTIMPLEMENTED; -#endif - break; - case isc_resource_stacksize: - *rlim_resource = RLIMIT_STACK; - break; - default: - /* - * This test is not very robust if isc_resource_t - * changes, but generates a clear assertion message. - */ - REQUIRE(resource >= isc_resource_coresize && - resource <= isc_resource_stacksize); - - result = ISC_R_RANGE; - break; - } - - return (result); -} - -isc_result_t -isc_resource_setlimit(isc_resource_t resource, isc_resourcevalue_t value) { - struct rlimit rl; - ISC_PLATFORM_RLIMITTYPE rlim_value; - int unixresult; - int unixresource; - isc_result_t result; - - result = resource2rlim(resource, &unixresource); - if (result != ISC_R_SUCCESS) - return (result); - - if (value == ISC_RESOURCE_UNLIMITED) - rlim_value = RLIM_INFINITY; - - else { - /* - * isc_resourcevalue_t was chosen as an unsigned 64 bit - * integer so that it could contain the maximum range of - * reasonable values. Unfortunately, this exceeds the typical - * range on Unix systems. Ensure the range of - * ISC_PLATFORM_RLIMITTYPE is not overflowed. - */ - isc_resourcevalue_t rlim_max; - isc_boolean_t rlim_t_is_signed = - ISC_TF(((double)(ISC_PLATFORM_RLIMITTYPE)-1) < 0); - - if (rlim_t_is_signed) - rlim_max = ~((ISC_PLATFORM_RLIMITTYPE)1 << - (sizeof(ISC_PLATFORM_RLIMITTYPE) * 8 - 1)); - else - rlim_max = (ISC_PLATFORM_RLIMITTYPE)-1; - - if (value > rlim_max) - value = rlim_max; - - rlim_value = value; - } - - /* - * The BIND 8 documentation reports: - * - * Note: on some operating systems the server cannot set an - * unlimited value and cannot determine the maximum number of - * open files the kernel can support. On such systems, choosing - * unlimited will cause the server to use the larger of the - * rlim_max for RLIMIT_NOFILE and the value returned by - * sysconf(_SC_OPEN_MAX). If the actual kernel limit is larger - * than this value, use limit files to specify the limit - * explicitly. - * - * The CHANGES for 8.1.2-T3A also mention: - * - * 352. [bug] Because of problems with setting an infinite - * rlim_max for RLIMIT_NOFILE on some systems, previous versions - * of the server implemented "limit files unlimited" by setting - * the limit to the value returned by sysconf(_SC_OPEN_MAX). The - * server will now use RLIM_INFINITY on systems which allow it. - * - * At some point the BIND 8 server stopped using SC_OPEN_MAX for this - * purpose at all, but it isn't clear to me when or why, as my access - * to the CVS archive is limited at the time of this writing. What - * BIND 8 *does* do is to set RLIMIT_NOFILE to either RLIMIT_INFINITY - * on a half dozen operating systems or to FD_SETSIZE on the rest, - * the latter of which is probably fewer than the real limit. (Note - * that libisc's socket module will have problems with any fd over - * FD_SETSIZE. This should be fixed in the socket module, not a - * limitation here. BIND 8's eventlib also has a problem, making - * its RLIMIT_INFINITY setting useless, because it closes and ignores - * any fd over FD_SETSIZE.) - * - * More troubling is the reference to some operating systems not being - * able to set an unlimited value for the number of open files. I'd - * hate to put in code that is really only there to support archaic - * systems that the rest of libisc won't work on anyway. So what this - * extremely verbose comment is here to say is the following: - * - * I'm aware there might be an issue with not limiting the value - * for RLIMIT_NOFILE on some systems, but since I don't know yet - * what those systems are and what the best workaround is (use - * sysconf()? rlim_max from getrlimit()? FD_SETSIZE?) so nothing - * is currently being done to clamp the value for open files. - */ - - rl.rlim_cur = rl.rlim_max = rlim_value; - unixresult = setrlimit(unixresource, &rl); - - if (unixresult == 0) - return (ISC_R_SUCCESS); - else - return (isc__errno2result(errno)); -} - -isc_result_t -isc_resource_getlimit(isc_resource_t resource, isc_resourcevalue_t *value) { - int unixresult; - int unixresource; - struct rlimit rl; - isc_result_t result; - - result = resource2rlim(resource, &unixresource); - if (result == ISC_R_SUCCESS) { - unixresult = getrlimit(unixresource, &rl); - INSIST(unixresult == 0); - *value = rl.rlim_max; - } - - return (result); -} |
