263 lines
6.3 KiB
C
263 lines
6.3 KiB
C
/* mdb_stat.c - memory-mapped database status tool */
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/*
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* Copyright 2011-2015 Howard Chu, Symas Corp.
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* 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 only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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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 "lmdb.h"
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#ifdef _WIN32
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#define Z "I"
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#else
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#define Z "z"
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#endif
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static void prstat(MDB_stat *ms)
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{
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#if 0
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printf(" Page size: %u\n", ms->ms_psize);
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#endif
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printf(" Tree depth: %u\n", ms->ms_depth);
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printf(" Branch pages: %"Z"u\n", ms->ms_branch_pages);
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printf(" Leaf pages: %"Z"u\n", ms->ms_leaf_pages);
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printf(" Overflow pages: %"Z"u\n", ms->ms_overflow_pages);
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printf(" Entries: %"Z"u\n", ms->ms_entries);
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}
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static void usage(char *prog)
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{
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fprintf(stderr, "usage: %s dbpath [-V] [-n] [-e] [-r[r]] [-f[f[f]]] [-a|-s subdb]\n", prog);
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exit(EXIT_FAILURE);
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}
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int main(int argc, char *argv[])
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{
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int i, rc;
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MDB_env *env;
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MDB_txn *txn;
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MDB_dbi dbi;
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MDB_stat mst;
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MDB_envinfo mei;
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char *prog = argv[0];
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char *envname;
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char *subname = NULL;
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int alldbs = 0, envinfo = 0, envflags = 0, freinfo = 0, rdrinfo = 0;
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if (argc < 2) {
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usage(prog);
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}
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/* -a: print stat of main DB and all subDBs
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* -s: print stat of only the named subDB
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* -e: print env info
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* -f: print freelist info
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* -r: print reader info
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* -n: use NOSUBDIR flag on env_open
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* -V: print version and exit
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* (default) print stat of only the main DB
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*/
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while ((i = getopt(argc, argv, "Vaefnrs:")) != EOF) {
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switch(i) {
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case 'V':
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printf("%s\n", MDB_VERSION_STRING);
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exit(0);
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break;
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case 'a':
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if (subname)
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usage(prog);
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alldbs++;
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break;
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case 'e':
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envinfo++;
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break;
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case 'f':
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freinfo++;
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break;
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case 'n':
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envflags |= MDB_NOSUBDIR;
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break;
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case 'r':
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rdrinfo++;
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break;
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case 's':
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if (alldbs)
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usage(prog);
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subname = optarg;
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break;
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default:
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usage(prog);
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}
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}
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if (optind != argc - 1)
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usage(prog);
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envname = argv[optind];
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rc = mdb_env_create(&env);
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if (rc) {
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fprintf(stderr, "mdb_env_create failed, error %d %s\n", rc, mdb_strerror(rc));
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return EXIT_FAILURE;
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}
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if (alldbs || subname) {
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mdb_env_set_maxdbs(env, 4);
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}
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rc = mdb_env_open(env, envname, envflags | MDB_RDONLY, 0664);
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if (rc) {
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fprintf(stderr, "mdb_env_open failed, error %d %s\n", rc, mdb_strerror(rc));
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goto env_close;
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}
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if (envinfo) {
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(void)mdb_env_stat(env, &mst);
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(void)mdb_env_info(env, &mei);
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printf("Environment Info\n");
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printf(" Map address: %p\n", mei.me_mapaddr);
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printf(" Map size: %"Z"u\n", mei.me_mapsize);
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printf(" Page size: %u\n", mst.ms_psize);
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printf(" Max pages: %"Z"u\n", mei.me_mapsize / mst.ms_psize);
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printf(" Number of pages used: %"Z"u\n", mei.me_last_pgno+1);
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printf(" Last transaction ID: %"Z"u\n", mei.me_last_txnid);
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printf(" Max readers: %u\n", mei.me_maxreaders);
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printf(" Number of readers used: %u\n", mei.me_numreaders);
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}
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if (rdrinfo) {
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printf("Reader Table Status\n");
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rc = mdb_reader_list(env, (MDB_msg_func *)fputs, stdout);
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if (rdrinfo > 1) {
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int dead;
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mdb_reader_check(env, &dead);
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printf(" %d stale readers cleared.\n", dead);
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rc = mdb_reader_list(env, (MDB_msg_func *)fputs, stdout);
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}
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if (!(subname || alldbs || freinfo))
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goto env_close;
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}
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rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn);
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if (rc) {
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fprintf(stderr, "mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc));
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goto env_close;
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}
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if (freinfo) {
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MDB_cursor *cursor;
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MDB_val key, data;
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size_t pages = 0, *iptr;
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printf("Freelist Status\n");
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dbi = 0;
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rc = mdb_cursor_open(txn, dbi, &cursor);
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if (rc) {
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fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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rc = mdb_stat(txn, dbi, &mst);
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if (rc) {
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fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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prstat(&mst);
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while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) {
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iptr = data.mv_data;
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pages += *iptr;
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if (freinfo > 1) {
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char *bad = "";
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size_t pg, prev;
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ssize_t i, j, span = 0;
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j = *iptr++;
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for (i = j, prev = 1; --i >= 0; ) {
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pg = iptr[i];
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if (pg <= prev)
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bad = " [bad sequence]";
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prev = pg;
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pg += span;
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for (; i >= span && iptr[i-span] == pg; span++, pg++) ;
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}
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printf(" Transaction %"Z"u, %"Z"d pages, maxspan %"Z"d%s\n",
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*(size_t *)key.mv_data, j, span, bad);
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if (freinfo > 2) {
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for (--j; j >= 0; ) {
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pg = iptr[j];
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for (span=1; --j >= 0 && iptr[j] == pg+span; span++) ;
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printf(span>1 ? " %9"Z"u[%"Z"d]\n" : " %9"Z"u\n",
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pg, span);
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}
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}
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}
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}
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mdb_cursor_close(cursor);
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printf(" Free pages: %"Z"u\n", pages);
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}
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rc = mdb_open(txn, subname, 0, &dbi);
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if (rc) {
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fprintf(stderr, "mdb_open failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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rc = mdb_stat(txn, dbi, &mst);
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if (rc) {
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fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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printf("Status of %s\n", subname ? subname : "Main DB");
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prstat(&mst);
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if (alldbs) {
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MDB_cursor *cursor;
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MDB_val key;
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rc = mdb_cursor_open(txn, dbi, &cursor);
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if (rc) {
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fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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while ((rc = mdb_cursor_get(cursor, &key, NULL, MDB_NEXT_NODUP)) == 0) {
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char *str;
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MDB_dbi db2;
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if (memchr(key.mv_data, '\0', key.mv_size))
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continue;
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str = malloc(key.mv_size+1);
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memcpy(str, key.mv_data, key.mv_size);
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str[key.mv_size] = '\0';
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rc = mdb_open(txn, str, 0, &db2);
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if (rc == MDB_SUCCESS)
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printf("Status of %s\n", str);
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free(str);
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if (rc) continue;
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rc = mdb_stat(txn, db2, &mst);
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if (rc) {
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fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc));
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goto txn_abort;
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}
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prstat(&mst);
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mdb_close(env, db2);
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}
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mdb_cursor_close(cursor);
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}
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if (rc == MDB_NOTFOUND)
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rc = MDB_SUCCESS;
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mdb_close(env, dbi);
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txn_abort:
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mdb_txn_abort(txn);
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env_close:
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mdb_env_close(env);
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return rc ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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