diff options
Diffstat (limited to 'external/db_drivers/liblmdb32/mdb_stat.c')
| -rw-r--r-- | external/db_drivers/liblmdb32/mdb_stat.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/external/db_drivers/liblmdb32/mdb_stat.c b/external/db_drivers/liblmdb32/mdb_stat.c new file mode 100644 index 000000000..1e9229296 --- /dev/null +++ b/external/db_drivers/liblmdb32/mdb_stat.c @@ -0,0 +1,263 @@ +/* mdb_stat.c - memory-mapped database status tool */ +/* + * Copyright 2011-2013 Howard Chu, Symas Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include "lmdb.h" + +#ifdef _WIN32 +#define Z "I" +#else +#define Z "z" +#endif + +static void prstat(MDB_stat *ms) +{ +#if 0 + printf(" Page size: %u\n", ms->ms_psize); +#endif + printf(" Tree depth: %u\n", ms->ms_depth); + printf(" Branch pages: %"Z"u\n", ms->ms_branch_pages); + printf(" Leaf pages: %"Z"u\n", ms->ms_leaf_pages); + printf(" Overflow pages: %"Z"u\n", ms->ms_overflow_pages); + printf(" Entries: %"Z"u\n", ms->ms_entries); +} + +static void usage(char *prog) +{ + fprintf(stderr, "usage: %s dbpath [-V] [-n] [-e] [-r[r]] [-f[f[f]]] [-a|-s subdb]\n", prog); + exit(EXIT_FAILURE); +} + +int main(int argc, char *argv[]) +{ + int i, rc; + MDB_env *env; + MDB_txn *txn; + MDB_dbi dbi; + MDB_stat mst; + MDB_envinfo mei; + char *prog = argv[0]; + char *envname; + char *subname = NULL; + int alldbs = 0, envinfo = 0, envflags = 0, freinfo = 0, rdrinfo = 0; + + if (argc < 2) { + usage(prog); + } + + /* -a: print stat of main DB and all subDBs + * -s: print stat of only the named subDB + * -e: print env info + * -f: print freelist info + * -r: print reader info + * -n: use NOSUBDIR flag on env_open + * -V: print version and exit + * (default) print stat of only the main DB + */ + while ((i = getopt(argc, argv, "Vaefnrs:")) != EOF) { + switch(i) { + case 'V': + printf("%s\n", MDB_VERSION_STRING); + exit(0); + break; + case 'a': + if (subname) + usage(prog); + alldbs++; + break; + case 'e': + envinfo++; + break; + case 'f': + freinfo++; + break; + case 'n': + envflags |= MDB_NOSUBDIR; + break; + case 'r': + rdrinfo++; + break; + case 's': + if (alldbs) + usage(prog); + subname = optarg; + break; + default: + usage(prog); + } + } + + if (optind != argc - 1) + usage(prog); + + envname = argv[optind]; + rc = mdb_env_create(&env); + if (rc) { + fprintf(stderr, "mdb_env_create failed, error %d %s\n", rc, mdb_strerror(rc)); + return EXIT_FAILURE; + } + + if (alldbs || subname) { + mdb_env_set_maxdbs(env, 4); + } + + rc = mdb_env_open(env, envname, envflags | MDB_RDONLY, 0664); + if (rc) { + fprintf(stderr, "mdb_env_open failed, error %d %s\n", rc, mdb_strerror(rc)); + goto env_close; + } + + if (envinfo) { + (void)mdb_env_stat(env, &mst); + (void)mdb_env_info(env, &mei); + printf("Environment Info\n"); + printf(" Map address: %p\n", mei.me_mapaddr); + printf(" Map size: %"Z"u\n", mei.me_mapsize); + printf(" Page size: %u\n", mst.ms_psize); + printf(" Max pages: %"Z"u\n", mei.me_mapsize / mst.ms_psize); + printf(" Number of pages used: %"Z"u\n", mei.me_last_pgno+1); + printf(" Last transaction ID: %"Z"u\n", mei.me_last_txnid); + printf(" Max readers: %u\n", mei.me_maxreaders); + printf(" Number of readers used: %u\n", mei.me_numreaders); + } + + if (rdrinfo) { + printf("Reader Table Status\n"); + rc = mdb_reader_list(env, (MDB_msg_func *)fputs, stdout); + if (rdrinfo > 1) { + int dead; + mdb_reader_check(env, &dead); + printf(" %d stale readers cleared.\n", dead); + rc = mdb_reader_list(env, (MDB_msg_func *)fputs, stdout); + } + if (!(subname || alldbs || freinfo)) + goto env_close; + } + + rc = mdb_txn_begin(env, NULL, MDB_RDONLY, &txn); + if (rc) { + fprintf(stderr, "mdb_txn_begin failed, error %d %s\n", rc, mdb_strerror(rc)); + goto env_close; + } + + if (freinfo) { + MDB_cursor *cursor; + MDB_val key, data; + size_t pages = 0, *iptr; + + printf("Freelist Status\n"); + dbi = 0; + rc = mdb_cursor_open(txn, dbi, &cursor); + if (rc) { + fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc)); + goto txn_abort; + } + rc = mdb_stat(txn, dbi, &mst); + if (rc) { + fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc)); + goto txn_abort; + } + prstat(&mst); + while ((rc = mdb_cursor_get(cursor, &key, &data, MDB_NEXT)) == 0) { + iptr = data.mv_data; + pages += *iptr; + if (freinfo > 1) { + char *bad = ""; + size_t pg, prev; + ssize_t i, j, span = 0; + j = *iptr++; + for (i = j, prev = 1; --i >= 0; ) { + pg = iptr[i]; + if (pg <= prev) + bad = " [bad sequence]"; + prev = pg; + pg += span; + for (; i >= span && iptr[i-span] == pg; span++, pg++) ; + } + printf(" Transaction %"Z"u, %"Z"d pages, maxspan %"Z"d%s\n", + *(size_t *)key.mv_data, j, span, bad); + if (freinfo > 2) { + for (--j; j >= 0; ) { + pg = iptr[j]; + for (span=1; --j >= 0 && iptr[j] == pg+span; span++) ; + printf(span>1 ? " %9"Z"u[%"Z"d]\n" : " %9"Z"u\n", + pg, span); + } + } + } + } + mdb_cursor_close(cursor); + printf(" Free pages: %"Z"u\n", pages); + } + + rc = mdb_open(txn, subname, 0, &dbi); + if (rc) { + fprintf(stderr, "mdb_open failed, error %d %s\n", rc, mdb_strerror(rc)); + goto txn_abort; + } + + rc = mdb_stat(txn, dbi, &mst); + if (rc) { + fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc)); + goto txn_abort; + } + printf("Status of %s\n", subname ? subname : "Main DB"); + prstat(&mst); + + if (alldbs) { + MDB_cursor *cursor; + MDB_val key; + + rc = mdb_cursor_open(txn, dbi, &cursor); + if (rc) { + fprintf(stderr, "mdb_cursor_open failed, error %d %s\n", rc, mdb_strerror(rc)); + goto txn_abort; + } + while ((rc = mdb_cursor_get(cursor, &key, NULL, MDB_NEXT_NODUP)) == 0) { + char *str; + MDB_dbi db2; + if (memchr(key.mv_data, '\0', key.mv_size)) + continue; + str = malloc(key.mv_size+1); + memcpy(str, key.mv_data, key.mv_size); + str[key.mv_size] = '\0'; + rc = mdb_open(txn, str, 0, &db2); + if (rc == MDB_SUCCESS) + printf("Status of %s\n", str); + free(str); + if (rc) continue; + rc = mdb_stat(txn, db2, &mst); + if (rc) { + fprintf(stderr, "mdb_stat failed, error %d %s\n", rc, mdb_strerror(rc)); + goto txn_abort; + } + prstat(&mst); + mdb_close(env, db2); + } + mdb_cursor_close(cursor); + } + + if (rc == MDB_NOTFOUND) + rc = MDB_SUCCESS; + + mdb_close(env, dbi); +txn_abort: + mdb_txn_abort(txn); +env_close: + mdb_env_close(env); + + return rc ? EXIT_FAILURE : EXIT_SUCCESS; +} |