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Diffstat (limited to '')
| -rw-r--r-- | common/dump.c | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/common/dump.c b/common/dump.c new file mode 100644 index 0000000..adcf591 --- /dev/null +++ b/common/dump.c @@ -0,0 +1,149 @@ + /* + Unix SMB/CIFS implementation. + + trivial database library + + Copyright (C) Andrew Tridgell 1999-2005 + Copyright (C) Paul `Rusty' Russell 2000 + Copyright (C) Jeremy Allison 2000-2003 + + ** NOTE! The following LGPL license applies to the tdb + ** library. This does NOT imply that all of Samba is released + ** under the LGPL + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 3 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with this library; if not, see <http://www.gnu.org/licenses/>. +*/ + +#include "tdb_private.h" + +static tdb_off_t tdb_dump_record(struct tdb_context *tdb, int hash, + tdb_off_t offset) +{ + struct tdb_record rec; + tdb_off_t tailer_ofs, tailer; + + if (tdb->methods->tdb_read(tdb, offset, (char *)&rec, + sizeof(rec), DOCONV()) == -1) { + printf("ERROR: failed to read record at %u\n", offset); + return 0; + } + + printf(" rec: hash=%d offset=0x%08x next=0x%08x rec_len=%u " + "key_len=%u data_len=%u full_hash=0x%08x magic=0x%08x\n", + hash, offset, rec.next, rec.rec_len, rec.key_len, rec.data_len, + rec.full_hash, rec.magic); + + tailer_ofs = offset + sizeof(rec) + rec.rec_len - sizeof(tdb_off_t); + + if (tdb_ofs_read(tdb, tailer_ofs, &tailer) == -1) { + printf("ERROR: failed to read tailer at %u\n", tailer_ofs); + return rec.next; + } + + if (tailer != rec.rec_len + sizeof(rec)) { + printf("ERROR: tailer does not match record! tailer=%u totalsize=%u\n", + (unsigned int)tailer, (unsigned int)(rec.rec_len + sizeof(rec))); + } + return rec.next; +} + +static int tdb_dump_chain(struct tdb_context *tdb, int i) +{ + struct tdb_chainwalk_ctx chainwalk; + tdb_off_t rec_ptr, top; + + if (i == -1) { + top = FREELIST_TOP; + } else { + top = TDB_HASH_TOP(i); + } + + if (tdb_lock(tdb, i, F_WRLCK) != 0) + return -1; + + if (tdb_ofs_read(tdb, top, &rec_ptr) == -1) + return tdb_unlock(tdb, i, F_WRLCK); + + tdb_chainwalk_init(&chainwalk, rec_ptr); + + if (rec_ptr) + printf("hash=%d\n", i); + + while (rec_ptr) { + bool ok; + rec_ptr = tdb_dump_record(tdb, i, rec_ptr); + ok = tdb_chainwalk_check(tdb, &chainwalk, rec_ptr); + if (!ok) { + printf("circular hash chain %d\n", i); + break; + } + } + + return tdb_unlock(tdb, i, F_WRLCK); +} + +_PUBLIC_ void tdb_dump_all(struct tdb_context *tdb) +{ + uint32_t i; + for (i=0;i<tdb->hash_size;i++) { + tdb_dump_chain(tdb, i); + } + printf("freelist:\n"); + tdb_dump_chain(tdb, -1); +} + +_PUBLIC_ int tdb_printfreelist(struct tdb_context *tdb) +{ + int ret; + long total_free = 0; + tdb_off_t offset, rec_ptr; + struct tdb_record rec; + + if ((ret = tdb_lock(tdb, -1, F_WRLCK)) != 0) + return ret; + + offset = FREELIST_TOP; + + /* read in the freelist top */ + if (tdb_ofs_read(tdb, offset, &rec_ptr) == -1) { + tdb_unlock(tdb, -1, F_WRLCK); + return 0; + } + + printf("freelist top=[0x%08x]\n", rec_ptr ); + while (rec_ptr) { + if (tdb->methods->tdb_read(tdb, rec_ptr, (char *)&rec, + sizeof(rec), DOCONV()) == -1) { + tdb_unlock(tdb, -1, F_WRLCK); + return -1; + } + + if (rec.magic != TDB_FREE_MAGIC) { + printf("bad magic 0x%08x in free list\n", rec.magic); + tdb_unlock(tdb, -1, F_WRLCK); + return -1; + } + + printf("entry offset=[0x%08x], rec.rec_len = [0x%08x (%u)] (end = 0x%08x)\n", + rec_ptr, rec.rec_len, rec.rec_len, rec_ptr + rec.rec_len); + total_free += rec.rec_len; + + /* move to the next record */ + rec_ptr = rec.next; + } + printf("total rec_len = [0x%08lx (%lu)]\n", total_free, total_free); + + return tdb_unlock(tdb, -1, F_WRLCK); +} + |