303 lines
9.0 KiB
C
303 lines
9.0 KiB
C
/* Copyright (c) 1998, 2003, 2004 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <error.h>
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#include <inttypes.h>
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#include <langinfo.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <libintl.h>
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#include "nscd.h"
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#include "dbg_log.h"
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#include "selinux.h"
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#ifdef HAVE_SELINUX
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# include <selinux/selinux.h>
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# include <selinux/avc.h>
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#endif /* HAVE_SELINUX */
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/* We use this to make sure the receiver is the same. */
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static const char compilation[21] = __DATE__ " " __TIME__;
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/* Statistic data for one database. */
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struct dbstat
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{
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int enabled;
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int check_file;
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int shared;
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int persistent;
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size_t module;
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unsigned long int postimeout;
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unsigned long int negtimeout;
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size_t nentries;
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size_t maxnentries;
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size_t maxnsearched;
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size_t datasize;
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size_t dataused;
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uintmax_t poshit;
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uintmax_t neghit;
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uintmax_t posmiss;
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uintmax_t negmiss;
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uintmax_t rdlockdelayed;
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uintmax_t wrlockdelayed;
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uintmax_t addfailed;
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};
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/* Record for transmitting statistics. */
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struct statdata
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{
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char version[sizeof (compilation)];
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int debug_level;
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time_t runtime;
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unsigned long int client_queued;
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int ndbs;
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struct dbstat dbs[lastdb];
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#ifdef HAVE_SELINUX
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struct avc_cache_stats cstats;
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#endif /* HAVE_SELINUX */
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};
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void
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send_stats (int fd, struct database_dyn dbs[lastdb])
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{
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struct statdata data;
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int cnt;
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memcpy (data.version, compilation, sizeof (compilation));
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data.debug_level = debug_level;
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data.runtime = time (NULL) - start_time;
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data.client_queued = client_queued;
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data.ndbs = lastdb;
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for (cnt = 0; cnt < lastdb; ++cnt)
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{
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memset (&data.dbs[cnt], 0, sizeof (data.dbs[cnt]));
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data.dbs[cnt].enabled = dbs[cnt].enabled;
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data.dbs[cnt].check_file = dbs[cnt].check_file;
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data.dbs[cnt].shared = dbs[cnt].shared;
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data.dbs[cnt].persistent = dbs[cnt].persistent;
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data.dbs[cnt].postimeout = dbs[cnt].postimeout;
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data.dbs[cnt].negtimeout = dbs[cnt].negtimeout;
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if (dbs[cnt].head != NULL)
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{
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data.dbs[cnt].module = dbs[cnt].head->module;
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data.dbs[cnt].poshit = dbs[cnt].head->poshit;
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data.dbs[cnt].neghit = dbs[cnt].head->neghit;
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data.dbs[cnt].posmiss = dbs[cnt].head->posmiss;
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data.dbs[cnt].negmiss = dbs[cnt].head->negmiss;
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data.dbs[cnt].nentries = dbs[cnt].head->nentries;
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data.dbs[cnt].maxnentries = dbs[cnt].head->maxnentries;
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data.dbs[cnt].datasize = dbs[cnt].head->data_size;
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data.dbs[cnt].dataused = dbs[cnt].head->first_free;
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data.dbs[cnt].maxnsearched = dbs[cnt].head->maxnsearched;
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data.dbs[cnt].rdlockdelayed = dbs[cnt].head->rdlockdelayed;
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data.dbs[cnt].wrlockdelayed = dbs[cnt].head->wrlockdelayed;
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data.dbs[cnt].addfailed = dbs[cnt].head->addfailed;
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}
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}
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if (selinux_enabled)
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nscd_avc_cache_stats (&data.cstats);
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if (TEMP_FAILURE_RETRY (write (fd, &data, sizeof (data))) != sizeof (data))
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{
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char buf[256];
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dbg_log (_("cannot write statistics: %s"),
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strerror_r (errno, buf, sizeof (buf)));
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}
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}
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int
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receive_print_stats (void)
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{
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struct statdata data;
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request_header req;
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ssize_t nbytes;
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int fd;
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int i;
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uid_t uid = getuid ();
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const char *yesstr = nl_langinfo (YESSTR);
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const char *nostr = nl_langinfo (NOSTR);
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/* Find out whether there is another user but root allowed to
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request statistics. */
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if (uid != 0)
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{
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/* User specified? */
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if(stat_user == NULL || stat_uid != uid)
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{
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if (stat_user != NULL)
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error (EXIT_FAILURE, 0,
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_("Only root or %s is allowed to use this option!"),
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stat_user);
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else
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error (EXIT_FAILURE, 0,
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_("Only root is allowed to use this option!"));
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}
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}
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/* Open a socket to the running nscd. */
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fd = nscd_open_socket ();
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if (fd == -1)
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error (EXIT_FAILURE, 0, _("nscd not running!\n"));
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/* Send the request. */
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req.version = NSCD_VERSION;
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req.type = GETSTAT;
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req.key_len = 0;
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nbytes = TEMP_FAILURE_RETRY (write (fd, &req, sizeof (request_header)));
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if (nbytes != sizeof (request_header))
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{
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int err = errno;
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close (fd);
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error (EXIT_FAILURE, err, _("write incomplete"));
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}
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/* Read as much data as we expect. */
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if (TEMP_FAILURE_RETRY (read (fd, &data, sizeof (data))) != sizeof (data)
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|| (memcmp (data.version, compilation, sizeof (compilation)) != 0
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/* Yes, this is an assignment! */
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&& (errno = EINVAL)))
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{
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/* Not the right version. */
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int err = errno;
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close (fd);
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error (EXIT_FAILURE, err, _("cannot read statistics data"));
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}
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printf (_("nscd configuration:\n\n%15d server debug level\n"),
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data.debug_level);
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/* We know that we can simply subtract time_t values. */
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unsigned long int diff = data.runtime;
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unsigned int ndays = 0;
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unsigned int nhours = 0;
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unsigned int nmins = 0;
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if (diff > 24 * 60 * 60)
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{
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ndays = diff / (24 * 60 * 60);
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diff %= 24 * 60 * 60;
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}
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if (diff > 60 * 60)
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{
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nhours = diff / (60 * 60);
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diff %= 60 * 60;
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}
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if (diff > 60)
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{
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nmins = diff / 60;
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diff %= 60;
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}
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if (ndays != 0)
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printf (_("%3ud %2uh %2um %2lus server runtime\n"),
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ndays, nhours, nmins, diff);
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else if (nhours != 0)
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printf (_(" %2uh %2um %2lus server runtime\n"), nhours, nmins, diff);
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else if (nmins != 0)
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printf (_(" %2um %2lus server runtime\n"), nmins, diff);
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else
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printf (_(" %2lus server runtime\n"), diff);
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printf (_("%15d current number of threads\n"
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"%15d maximum number of threads\n"
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"%15lu number of times clients had to wait\n"
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"%15s paranoia mode enabled\n"
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"%15lu restart internal\n"),
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nthreads, max_nthreads, data.client_queued,
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paranoia ? yesstr : nostr, (unsigned long int) restart_interval);
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for (i = 0; i < lastdb; ++i)
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{
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unsigned long int hit = data.dbs[i].poshit + data.dbs[i].neghit;
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unsigned long int all = hit + data.dbs[i].posmiss + data.dbs[i].negmiss;
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const char *enabled = data.dbs[i].enabled ? yesstr : nostr;
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const char *check_file = data.dbs[i].check_file ? yesstr : nostr;
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const char *shared = data.dbs[i].shared ? yesstr : nostr;
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const char *persistent = data.dbs[i].persistent ? yesstr : nostr;
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if (enabled[0] == '\0')
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/* The locale does not provide this information so we have to
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translate it ourself. Since we should avoid short translation
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terms we artifically increase the length. */
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enabled = data.dbs[i].enabled ? yesstr : nostr;
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if (check_file[0] == '\0')
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check_file = data.dbs[i].check_file ? yesstr : nostr;
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if (shared[0] == '\0')
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shared = data.dbs[i].shared ? yesstr : nostr;
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if (persistent[0] == '\0')
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persistent = data.dbs[i].persistent ? yesstr : nostr;
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if (all == 0)
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/* If nothing happened so far report a 0% hit rate. */
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all = 1;
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printf (_("\n%s cache:\n\n"
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"%15s cache is enabled\n"
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"%15s cache is persistent\n"
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"%15s cache is shared\n"
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"%15zu suggested size\n"
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"%15zu total data pool size\n"
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"%15zu used data pool size\n"
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"%15lu seconds time to live for positive entries\n"
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"%15lu seconds time to live for negative entries\n"
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"%15" PRIuMAX " cache hits on positive entries\n"
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"%15" PRIuMAX " cache hits on negative entries\n"
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"%15" PRIuMAX " cache misses on positive entries\n"
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"%15" PRIuMAX " cache misses on negative entries\n"
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"%15lu%% cache hit rate\n"
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"%15zu current number of cached values\n"
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"%15zu maximum number of cached values\n"
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"%15zu maximum chain length searched\n"
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"%15" PRIuMAX " number of delays on rdlock\n"
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"%15" PRIuMAX " number of delays on wrlock\n"
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"%15" PRIuMAX " memory allocations failed\n"
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"%15s check /etc/%s for changes\n"),
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dbnames[i], enabled, persistent, shared,
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data.dbs[i].module,
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data.dbs[i].datasize, data.dbs[i].dataused,
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data.dbs[i].postimeout, data.dbs[i].negtimeout,
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data.dbs[i].poshit, data.dbs[i].neghit,
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data.dbs[i].posmiss, data.dbs[i].negmiss,
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(100 * hit) / all,
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data.dbs[i].nentries, data.dbs[i].maxnentries,
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data.dbs[i].maxnsearched,
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data.dbs[i].rdlockdelayed,
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data.dbs[i].wrlockdelayed,
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data.dbs[i].addfailed, check_file, dbnames[i]);
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}
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if (selinux_enabled)
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nscd_avc_print_stats (&data.cstats);
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close (fd);
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exit (0);
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}
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