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wmi-1.3.16 from opsview.com

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Are Casilla
2019-02-16 00:16:52 +01:00
parent 163fdd3d1b
commit 17b3af2911
2146 changed files with 678824 additions and 0 deletions
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Samba/source/lib/tdb/Makefile.in
+89
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#!gmake
#
# Makefile for tdb directory
#
CC = @CC@
prefix = @prefix@
exec_prefix = @exec_prefix@
bindir = @bindir@
includedir = @includedir@
libdir = @libdir@
VPATH = @srcdir@:@libreplacedir@
srcdir = @srcdir@
builddir = @builddir@
CPPFLAGS = @CPPFLAGS@ -I$(srcdir)/include -Iinclude -I@libreplacedir@
CFLAGS = $(CPPFLAGS) @CFLAGS@
LDFLAGS = @LDFLAGS@
EXEEXT = @EXEEXT@
.PHONY: test
PROGS = bin/tdbtool$(EXEEXT) bin/tdbtorture$(EXEEXT)
PROGS_NOINSTALL = bin/tdbtest$(EXEEXT) bin/tdbdump$(EXEEXT) bin/tdbbackup$(EXEEXT)
ALL_PROGS = $(PROGS) $(PROGS_NOINSTALL)
TDB_OBJ = @TDBOBJ@ @LIBREPLACEOBJ@
DIRS = bin common tools
all: showflags dirs $(PROGS)
showflags:
@echo 'tdb will be compiled with flags:'
@echo ' CFLAGS = $(CFLAGS)'
@echo ' CPPFLAGS = $(CPPFLAGS)'
@echo ' LDFLAGS = $(LDFLAGS)'
@echo ' LIBS = $(LIBS)'
.c.o:
@echo Compiling $*.c
@mkdir -p `dirname $@`
@$(CC) $(CFLAGS) -c $< -o $@
dirs:
@mkdir -p $(DIRS)
install: all
mkdir -p $(bindir)
mkdir -p $(includedir)
mkdir -p $(libdir)
mkdir -p $(libdir)/pkgconfig
cp $(PROGS) $(bindir)
cp $(srcdir)/include/tdb.h $(includedir)
cp tdb.pc $(libdir)/pkgconfig
libtdb.a: $(TDB_OBJ)
ar -rv libtdb.a $(TDB_OBJ)
bin/tdbtest$(EXEEXT): tools/tdbtest.o libtdb.a
$(CC) $(CFLAGS) $(LDFLAGS) -o bin/tdbtest tools/tdbtest.o -L. -ltdb -lgdbm
bin/tdbtool$(EXEEXT): tools/tdbtool.o libtdb.a
$(CC) $(CFLAGS) $(LDFLAGS) -o bin/tdbtool tools/tdbtool.o -L. -ltdb
bin/tdbtorture$(EXEEXT): tools/tdbtorture.o libtdb.a
$(CC) $(CFLAGS) $(LDFLAGS) -o bin/tdbtorture tools/tdbtorture.o -L. -ltdb
bin/tdbdump$(EXEEXT): tools/tdbdump.o libtdb.a
$(CC) $(CFLAGS) $(LDFLAGS) -o bin/tdbdump tools/tdbdump.o -L. -ltdb
bin/tdbbackup$(EXEEXT): tools/tdbbackup.o libtdb.a
$(CC) $(CFLAGS) $(LDFLAGS) -o bin/tdbbackup tools/tdbbackup.o -L. -ltdb
test: bin/tdbtorture$(EXEEXT)
bin/tdbtorture$(EXEEXT)
installcheck: test install
clean:
rm -f $(ALL_PROGS) *.o *.a common/*.o tools/*.o tdb.pc
rm -f test.db test.tdb torture.tdb test.gdbm
distclean: clean
rm -f *~ */*~
rm -f config.log config.status include/config.h config.cache
rm -f Makefile
realdistclean: distclean
rm -f configure include/config.h.in
Samba/source/lib/tdb/aclocal.m4
Vendored
+1
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@@ -0,0 +1 @@
m4_include(libreplace.m4)
Samba/source/lib/tdb/autogen.sh
Executable
+14
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@@ -0,0 +1,14 @@
#!/bin/sh
rm -rf autom4te.cache
rm -f configure config.h.in
IPATHS="-I libreplace -I lib/replace -I ../libreplace -I ../replace"
autoconf $IPATHS || exit 1
autoheader $IPATHS || exit 1
rm -rf autom4te.cache
echo "Now run ./configure and then make."
exit 0
Samba/source/lib/tdb/common/dump.c
+135
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@@ -0,0 +1,135 @@
/*
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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tdb_private.h"
static tdb_off_t tdb_dump_record(struct tdb_context *tdb, tdb_off_t offset)
{
struct list_struct 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: offset=0x%08x next=0x%08x rec_len=%d key_len=%d data_len=%d full_hash=0x%x magic=0x%x\n",
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)
{
tdb_off_t rec_ptr, top;
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);
if (rec_ptr)
printf("hash=%d\n", i);
while (rec_ptr) {
rec_ptr = tdb_dump_record(tdb, rec_ptr);
}
return tdb_unlock(tdb, i, F_WRLCK);
}
void tdb_dump_all(struct tdb_context *tdb)
{
int i;
for (i=0;i<tdb->header.hash_size;i++) {
tdb_dump_chain(tdb, i);
}
printf("freelist:\n");
tdb_dump_chain(tdb, -1);
}
int tdb_printfreelist(struct tdb_context *tdb)
{
int ret;
long total_free = 0;
tdb_off_t offset, rec_ptr;
struct list_struct 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 (%d)] (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%08x (%d)]\n", (int)total_free,
(int)total_free);
return tdb_unlock(tdb, -1, F_WRLCK);
}
Samba/source/lib/tdb/common/error.c
+58
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@@ -0,0 +1,58 @@
/*
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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tdb_private.h"
enum TDB_ERROR tdb_error(struct tdb_context *tdb)
{
return tdb->ecode;
}
static struct tdb_errname {
enum TDB_ERROR ecode; const char *estring;
} emap[] = { {TDB_SUCCESS, "Success"},
{TDB_ERR_CORRUPT, "Corrupt database"},
{TDB_ERR_IO, "IO Error"},
{TDB_ERR_LOCK, "Locking error"},
{TDB_ERR_OOM, "Out of memory"},
{TDB_ERR_EXISTS, "Record exists"},
{TDB_ERR_NOLOCK, "Lock exists on other keys"},
{TDB_ERR_EINVAL, "Invalid parameter"},
{TDB_ERR_NOEXIST, "Record does not exist"},
{TDB_ERR_RDONLY, "write not permitted"} };
/* Error string for the last tdb error */
const char *tdb_errorstr(struct tdb_context *tdb)
{
u32 i;
for (i = 0; i < sizeof(emap) / sizeof(struct tdb_errname); i++)
if (tdb->ecode == emap[i].ecode)
return emap[i].estring;
return "Invalid error code";
}
Samba/source/lib/tdb/common/freelist.c
+331
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@@ -0,0 +1,331 @@
/*
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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tdb_private.h"
/* read a freelist record and check for simple errors */
int rec_free_read(struct tdb_context *tdb, tdb_off_t off, struct list_struct *rec)
{
if (tdb->methods->tdb_read(tdb, off, rec, sizeof(*rec),DOCONV()) == -1)
return -1;
if (rec->magic == TDB_MAGIC) {
/* this happens when a app is showdown while deleting a record - we should
not completely fail when this happens */
TDB_LOG((tdb, TDB_DEBUG_WARNING, "rec_free_read non-free magic 0x%x at offset=%d - fixing\n",
rec->magic, off));
rec->magic = TDB_FREE_MAGIC;
if (tdb->methods->tdb_write(tdb, off, rec, sizeof(*rec)) == -1)
return -1;
}
if (rec->magic != TDB_FREE_MAGIC) {
/* Ensure ecode is set for log fn. */
tdb->ecode = TDB_ERR_CORRUPT;
TDB_LOG((tdb, TDB_DEBUG_WARNING, "rec_free_read bad magic 0x%x at offset=%d\n",
rec->magic, off));
return TDB_ERRCODE(TDB_ERR_CORRUPT, -1);
}
if (tdb->methods->tdb_oob(tdb, rec->next+sizeof(*rec), 0) != 0)
return -1;
return 0;
}
/* Remove an element from the freelist. Must have alloc lock. */
static int remove_from_freelist(struct tdb_context *tdb, tdb_off_t off, tdb_off_t next)
{
tdb_off_t last_ptr, i;
/* read in the freelist top */
last_ptr = FREELIST_TOP;
while (tdb_ofs_read(tdb, last_ptr, &i) != -1 && i != 0) {
if (i == off) {
/* We've found it! */
return tdb_ofs_write(tdb, last_ptr, &next);
}
/* Follow chain (next offset is at start of record) */
last_ptr = i;
}
TDB_LOG((tdb, TDB_DEBUG_FATAL,"remove_from_freelist: not on list at off=%d\n", off));
return TDB_ERRCODE(TDB_ERR_CORRUPT, -1);
}
/* update a record tailer (must hold allocation lock) */
static int update_tailer(struct tdb_context *tdb, tdb_off_t offset,
const struct list_struct *rec)
{
tdb_off_t totalsize;
/* Offset of tailer from record header */
totalsize = sizeof(*rec) + rec->rec_len;
return tdb_ofs_write(tdb, offset + totalsize - sizeof(tdb_off_t),
&totalsize);
}
/* Add an element into the freelist. Merge adjacent records if
neccessary. */
int tdb_free(struct tdb_context *tdb, tdb_off_t offset, struct list_struct *rec)
{
tdb_off_t right, left;
/* Allocation and tailer lock */
if (tdb_lock(tdb, -1, F_WRLCK) != 0)
return -1;
/* set an initial tailer, so if we fail we don't leave a bogus record */
if (update_tailer(tdb, offset, rec) != 0) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_free: update_tailer failed!\n"));
goto fail;
}
/* Look right first (I'm an Australian, dammit) */
right = offset + sizeof(*rec) + rec->rec_len;
if (right + sizeof(*rec) <= tdb->map_size) {
struct list_struct r;
if (tdb->methods->tdb_read(tdb, right, &r, sizeof(r), DOCONV()) == -1) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_free: right read failed at %u\n", right));
goto left;
}
/* If it's free, expand to include it. */
if (r.magic == TDB_FREE_MAGIC) {
if (remove_from_freelist(tdb, right, r.next) == -1) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_free: right free failed at %u\n", right));
goto left;
}
rec->rec_len += sizeof(r) + r.rec_len;
}
}
left:
/* Look left */
left = offset - sizeof(tdb_off_t);
if (left > TDB_DATA_START(tdb->header.hash_size)) {
struct list_struct l;
tdb_off_t leftsize;
/* Read in tailer and jump back to header */
if (tdb_ofs_read(tdb, left, &leftsize) == -1) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_free: left offset read failed at %u\n", left));
goto update;
}
/* it could be uninitialised data */
if (leftsize == 0 || leftsize == TDB_PAD_U32) {
goto update;
}
left = offset - leftsize;
/* Now read in record */
if (tdb->methods->tdb_read(tdb, left, &l, sizeof(l), DOCONV()) == -1) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_free: left read failed at %u (%u)\n", left, leftsize));
goto update;
}
/* If it's free, expand to include it. */
if (l.magic == TDB_FREE_MAGIC) {
if (remove_from_freelist(tdb, left, l.next) == -1) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_free: left free failed at %u\n", left));
goto update;
} else {
offset = left;
rec->rec_len += leftsize;
}
}
}
update:
if (update_tailer(tdb, offset, rec) == -1) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_free: update_tailer failed at %u\n", offset));
goto fail;
}
/* Now, prepend to free list */
rec->magic = TDB_FREE_MAGIC;
if (tdb_ofs_read(tdb, FREELIST_TOP, &rec->next) == -1 ||
tdb_rec_write(tdb, offset, rec) == -1 ||
tdb_ofs_write(tdb, FREELIST_TOP, &offset) == -1) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_free record write failed at offset=%d\n", offset));
goto fail;
}
/* And we're done. */
tdb_unlock(tdb, -1, F_WRLCK);
return 0;
fail:
tdb_unlock(tdb, -1, F_WRLCK);
return -1;
}
/*
the core of tdb_allocate - called when we have decided which
free list entry to use
*/
static tdb_off_t tdb_allocate_ofs(struct tdb_context *tdb, tdb_len_t length, tdb_off_t rec_ptr,
struct list_struct *rec, tdb_off_t last_ptr)
{
struct list_struct newrec;
tdb_off_t newrec_ptr;
memset(&newrec, '\0', sizeof(newrec));
/* found it - now possibly split it up */
if (rec->rec_len > length + MIN_REC_SIZE) {
/* Length of left piece */
length = TDB_ALIGN(length, TDB_ALIGNMENT);
/* Right piece to go on free list */
newrec.rec_len = rec->rec_len - (sizeof(*rec) + length);
newrec_ptr = rec_ptr + sizeof(*rec) + length;
/* And left record is shortened */
rec->rec_len = length;
} else {
newrec_ptr = 0;
}
/* Remove allocated record from the free list */
if (tdb_ofs_write(tdb, last_ptr, &rec->next) == -1) {
return 0;
}
/* Update header: do this before we drop alloc
lock, otherwise tdb_free() might try to
merge with us, thinking we're free.
(Thanks Jeremy Allison). */
rec->magic = TDB_MAGIC;
if (tdb_rec_write(tdb, rec_ptr, rec) == -1) {
return 0;
}
/* Did we create new block? */
if (newrec_ptr) {
/* Update allocated record tailer (we
shortened it). */
if (update_tailer(tdb, rec_ptr, rec) == -1) {
return 0;
}
/* Free new record */
if (tdb_free(tdb, newrec_ptr, &newrec) == -1) {
return 0;
}
}
/* all done - return the new record offset */
return rec_ptr;
}
/* allocate some space from the free list. The offset returned points
to a unconnected list_struct within the database with room for at
least length bytes of total data
0 is returned if the space could not be allocated
*/
tdb_off_t tdb_allocate(struct tdb_context *tdb, tdb_len_t length, struct list_struct *rec)
{
tdb_off_t rec_ptr, last_ptr, newrec_ptr;
struct {
tdb_off_t rec_ptr, last_ptr;
tdb_len_t rec_len;
} bestfit;
if (tdb_lock(tdb, -1, F_WRLCK) == -1)
return 0;
/* Extra bytes required for tailer */
length += sizeof(tdb_off_t);
again:
last_ptr = FREELIST_TOP;
/* read in the freelist top */
if (tdb_ofs_read(tdb, FREELIST_TOP, &rec_ptr) == -1)
goto fail;
bestfit.rec_ptr = 0;
bestfit.last_ptr = 0;
bestfit.rec_len = 0;
/*
this is a best fit allocation strategy. Originally we used
a first fit strategy, but it suffered from massive fragmentation
issues when faced with a slowly increasing record size.
*/
while (rec_ptr) {
if (rec_free_read(tdb, rec_ptr, rec) == -1) {
goto fail;
}
if (rec->rec_len >= length) {
if (bestfit.rec_ptr == 0 ||
rec->rec_len < bestfit.rec_len) {
bestfit.rec_len = rec->rec_len;
bestfit.rec_ptr = rec_ptr;
bestfit.last_ptr = last_ptr;
/* consider a fit to be good enough if
we aren't wasting more than half
the space */
if (bestfit.rec_len < 2*length) {
break;
}
}
}
/* move to the next record */
last_ptr = rec_ptr;
rec_ptr = rec->next;
}
if (bestfit.rec_ptr != 0) {
if (rec_free_read(tdb, bestfit.rec_ptr, rec) == -1) {
goto fail;
}
newrec_ptr = tdb_allocate_ofs(tdb, length, bestfit.rec_ptr, rec, bestfit.last_ptr);
tdb_unlock(tdb, -1, F_WRLCK);
return newrec_ptr;
}
/* we didn't find enough space. See if we can expand the
database and if we can then try again */
if (tdb_expand(tdb, length + sizeof(*rec)) == 0)
goto again;
fail:
tdb_unlock(tdb, -1, F_WRLCK);
return 0;
}
Samba/source/lib/tdb/common/freelistcheck.c
+108
View File
@@ -0,0 +1,108 @@
/*
Unix SMB/CIFS implementation.
trivial database library
Copyright (C) Jeremy Allison 2006
** 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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tdb_private.h"
/* Check the freelist is good and contains no loops.
Very memory intensive - only do this as a consistency
checker. Heh heh - uses an in memory tdb as the storage
for the "seen" record list. For some reason this strikes
me as extremely clever as I don't have to write another tree
data structure implementation :-).
*/
static int seen_insert(struct tdb_context *mem_tdb, tdb_off_t rec_ptr)
{
TDB_DATA key, data;
memset(&data, '\0', sizeof(data));
key.dptr = (char *)&rec_ptr;
key.dsize = sizeof(rec_ptr);
return tdb_store(mem_tdb, key, data, TDB_INSERT);
}
int tdb_validate_freelist(struct tdb_context *tdb, int *pnum_entries)
{
struct tdb_context *mem_tdb = NULL;
struct list_struct rec;
tdb_off_t rec_ptr, last_ptr;
int ret = -1;
*pnum_entries = 0;
mem_tdb = tdb_open("flval", tdb->header.hash_size,
TDB_INTERNAL, O_RDWR, 0600);
if (!mem_tdb) {
return -1;
}
if (tdb_lock(tdb, -1, F_WRLCK) == -1) {
tdb_close(mem_tdb);
return 0;
}
last_ptr = FREELIST_TOP;
/* Store the FREELIST_TOP record. */
if (seen_insert(mem_tdb, last_ptr) == -1) {
ret = TDB_ERRCODE(TDB_ERR_CORRUPT, -1);
goto fail;
}
/* read in the freelist top */
if (tdb_ofs_read(tdb, FREELIST_TOP, &rec_ptr) == -1) {
goto fail;
}
while (rec_ptr) {
/* If we can't store this record (we've seen it
before) then the free list has a loop and must
be corrupt. */
if (seen_insert(mem_tdb, rec_ptr)) {
ret = TDB_ERRCODE(TDB_ERR_CORRUPT, -1);
goto fail;
}
if (rec_free_read(tdb, rec_ptr, &rec) == -1) {
goto fail;
}
/* move to the next record */
last_ptr = rec_ptr;
rec_ptr = rec.next;
*pnum_entries += 1;
}
ret = 0;
fail:
tdb_close(mem_tdb);
tdb_unlock(tdb, -1, F_WRLCK);
return ret;
}
Samba/source/lib/tdb/common/io.c
+391
View File
@@ -0,0 +1,391 @@
/*
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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tdb_private.h"
/* check for an out of bounds access - if it is out of bounds then
see if the database has been expanded by someone else and expand
if necessary
note that "len" is the minimum length needed for the db
*/
static int tdb_oob(struct tdb_context *tdb, tdb_off_t len, int probe)
{
struct stat st;
if (len <= tdb->map_size)
return 0;
if (tdb->flags & TDB_INTERNAL) {
if (!probe) {
/* Ensure ecode is set for log fn. */
tdb->ecode = TDB_ERR_IO;
TDB_LOG((tdb, TDB_DEBUG_FATAL,"tdb_oob len %d beyond internal malloc size %d\n",
(int)len, (int)tdb->map_size));
}
return TDB_ERRCODE(TDB_ERR_IO, -1);
}
if (fstat(tdb->fd, &st) == -1) {
return TDB_ERRCODE(TDB_ERR_IO, -1);
}
if (st.st_size < (size_t)len) {
if (!probe) {
/* Ensure ecode is set for log fn. */
tdb->ecode = TDB_ERR_IO;
TDB_LOG((tdb, TDB_DEBUG_FATAL,"tdb_oob len %d beyond eof at %d\n",
(int)len, (int)st.st_size));
}
return TDB_ERRCODE(TDB_ERR_IO, -1);
}
/* Unmap, update size, remap */
if (tdb_munmap(tdb) == -1)
return TDB_ERRCODE(TDB_ERR_IO, -1);
tdb->map_size = st.st_size;
tdb_mmap(tdb);
return 0;
}
/* write a lump of data at a specified offset */
static int tdb_write(struct tdb_context *tdb, tdb_off_t off,
const void *buf, tdb_len_t len)
{
if (len == 0) {
return 0;
}
if (tdb->read_only || tdb->traverse_read) {
tdb->ecode = TDB_ERR_RDONLY;
return -1;
}
if (tdb->methods->tdb_oob(tdb, off + len, 0) != 0)
return -1;
if (tdb->map_ptr) {
memcpy(off + (char *)tdb->map_ptr, buf, len);
} else if (pwrite(tdb->fd, buf, len, off) != (ssize_t)len) {
/* Ensure ecode is set for log fn. */
tdb->ecode = TDB_ERR_IO;
TDB_LOG((tdb, TDB_DEBUG_FATAL,"tdb_write failed at %d len=%d (%s)\n",
off, len, strerror(errno)));
return TDB_ERRCODE(TDB_ERR_IO, -1);
}
return 0;
}
/* Endian conversion: we only ever deal with 4 byte quantities */
void *tdb_convert(void *buf, u32 size)
{
u32 i, *p = (u32 *)buf;
for (i = 0; i < size / 4; i++)
p[i] = TDB_BYTEREV(p[i]);
return buf;
}
/* read a lump of data at a specified offset, maybe convert */
static int tdb_read(struct tdb_context *tdb, tdb_off_t off, void *buf,
tdb_len_t len, int cv)
{
if (tdb->methods->tdb_oob(tdb, off + len, 0) != 0) {
return -1;
}
if (tdb->map_ptr) {
memcpy(buf, off + (char *)tdb->map_ptr, len);
} else {
ssize_t ret = pread(tdb->fd, buf, len, off);
if (ret != (ssize_t)len) {
/* Ensure ecode is set for log fn. */
tdb->ecode = TDB_ERR_IO;
TDB_LOG((tdb, TDB_DEBUG_FATAL,"tdb_read failed at %d len=%d ret=%d (%s) map_size=%d\n",
off, len, ret, strerror(errno), (int)tdb->map_size));
return TDB_ERRCODE(TDB_ERR_IO, -1);
}
}
if (cv) {
tdb_convert(buf, len);
}
return 0;
}
/*
do an unlocked scan of the hash table heads to find the next non-zero head. The value
will then be confirmed with the lock held
*/
static void tdb_next_hash_chain(struct tdb_context *tdb, u32 *chain)
{
u32 h = *chain;
if (tdb->map_ptr) {
for (;h < tdb->header.hash_size;h++) {
if (0 != *(u32 *)(TDB_HASH_TOP(h) + (unsigned char *)tdb->map_ptr)) {
break;
}
}
} else {
u32 off=0;
for (;h < tdb->header.hash_size;h++) {
if (tdb_ofs_read(tdb, TDB_HASH_TOP(h), &off) != 0 || off != 0) {
break;
}
}
}
(*chain) = h;
}
int tdb_munmap(struct tdb_context *tdb)
{
if (tdb->flags & TDB_INTERNAL)
return 0;
#ifdef HAVE_MMAP
if (tdb->map_ptr) {
int ret = munmap(tdb->map_ptr, tdb->map_size);
if (ret != 0)
return ret;
}
#endif
tdb->map_ptr = NULL;
return 0;
}
void tdb_mmap(struct tdb_context *tdb)
{
if (tdb->flags & TDB_INTERNAL)
return;
#ifdef HAVE_MMAP
if (!(tdb->flags & TDB_NOMMAP)) {
tdb->map_ptr = mmap(NULL, tdb->map_size,
PROT_READ|(tdb->read_only? 0:PROT_WRITE),
MAP_SHARED|MAP_FILE, tdb->fd, 0);
/*
* NB. When mmap fails it returns MAP_FAILED *NOT* NULL !!!!
*/
if (tdb->map_ptr == MAP_FAILED) {
tdb->map_ptr = NULL;
TDB_LOG((tdb, TDB_DEBUG_WARNING, "tdb_mmap failed for size %d (%s)\n",
tdb->map_size, strerror(errno)));
}
} else {
tdb->map_ptr = NULL;
}
#else
tdb->map_ptr = NULL;
#endif
}
/* expand a file. we prefer to use ftruncate, as that is what posix
says to use for mmap expansion */
static int tdb_expand_file(struct tdb_context *tdb, tdb_off_t size, tdb_off_t addition)
{
char buf[1024];
if (tdb->read_only || tdb->traverse_read) {
tdb->ecode = TDB_ERR_RDONLY;
return -1;
}
if (ftruncate(tdb->fd, size+addition) == -1) {
char b = 0;
if (pwrite(tdb->fd, &b, 1, (size+addition) - 1) != 1) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "expand_file to %d failed (%s)\n",
size+addition, strerror(errno)));
return -1;
}
}
/* now fill the file with something. This ensures that the
file isn't sparse, which would be very bad if we ran out of
disk. This must be done with write, not via mmap */
memset(buf, TDB_PAD_BYTE, sizeof(buf));
while (addition) {
int n = addition>sizeof(buf)?sizeof(buf):addition;
int ret = pwrite(tdb->fd, buf, n, size);
if (ret != n) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "expand_file write of %d failed (%s)\n",
n, strerror(errno)));
return -1;
}
addition -= n;
size += n;
}
return 0;
}
/* expand the database at least size bytes by expanding the underlying
file and doing the mmap again if necessary */
int tdb_expand(struct tdb_context *tdb, tdb_off_t size)
{
struct list_struct rec;
tdb_off_t offset;
if (tdb_lock(tdb, -1, F_WRLCK) == -1) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "lock failed in tdb_expand\n"));
return -1;
}
/* must know about any previous expansions by another process */
tdb->methods->tdb_oob(tdb, tdb->map_size + 1, 1);
/* always make room for at least 10 more records, and round
the database up to a multiple of the page size */
size = TDB_ALIGN(tdb->map_size + size*10, tdb->page_size) - tdb->map_size;
if (!(tdb->flags & TDB_INTERNAL))
tdb_munmap(tdb);
/*
* We must ensure the file is unmapped before doing this
* to ensure consistency with systems like OpenBSD where
* writes and mmaps are not consistent.
*/
/* expand the file itself */
if (!(tdb->flags & TDB_INTERNAL)) {
if (tdb->methods->tdb_expand_file(tdb, tdb->map_size, size) != 0)
goto fail;
}
tdb->map_size += size;
if (tdb->flags & TDB_INTERNAL) {
char *new_map_ptr = (char *)realloc(tdb->map_ptr,
tdb->map_size);
if (!new_map_ptr) {
tdb->map_size -= size;
goto fail;
}
tdb->map_ptr = new_map_ptr;
} else {
/*
* We must ensure the file is remapped before adding the space
* to ensure consistency with systems like OpenBSD where
* writes and mmaps are not consistent.
*/
/* We're ok if the mmap fails as we'll fallback to read/write */
tdb_mmap(tdb);
}
/* form a new freelist record */
memset(&rec,'\0',sizeof(rec));
rec.rec_len = size - sizeof(rec);
/* link it into the free list */
offset = tdb->map_size - size;
if (tdb_free(tdb, offset, &rec) == -1)
goto fail;
tdb_unlock(tdb, -1, F_WRLCK);
return 0;
fail:
tdb_unlock(tdb, -1, F_WRLCK);
return -1;
}
/* read/write a tdb_off_t */
int tdb_ofs_read(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d)
{
return tdb->methods->tdb_read(tdb, offset, (char*)d, sizeof(*d), DOCONV());
}
int tdb_ofs_write(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d)
{
tdb_off_t off = *d;
return tdb->methods->tdb_write(tdb, offset, CONVERT(off), sizeof(*d));
}
/* read a lump of data, allocating the space for it */
unsigned char *tdb_alloc_read(struct tdb_context *tdb, tdb_off_t offset, tdb_len_t len)
{
unsigned char *buf;
/* some systems don't like zero length malloc */
if (len == 0) {
len = 1;
}
if (!(buf = malloc(len))) {
/* Ensure ecode is set for log fn. */
tdb->ecode = TDB_ERR_OOM;
TDB_LOG((tdb, TDB_DEBUG_ERROR,"tdb_alloc_read malloc failed len=%d (%s)\n",
len, strerror(errno)));
return TDB_ERRCODE(TDB_ERR_OOM, buf);
}
if (tdb->methods->tdb_read(tdb, offset, buf, len, 0) == -1) {
SAFE_FREE(buf);
return NULL;
}
return buf;
}
/* read/write a record */
int tdb_rec_read(struct tdb_context *tdb, tdb_off_t offset, struct list_struct *rec)
{
if (tdb->methods->tdb_read(tdb, offset, rec, sizeof(*rec),DOCONV()) == -1)
return -1;
if (TDB_BAD_MAGIC(rec)) {
/* Ensure ecode is set for log fn. */
tdb->ecode = TDB_ERR_CORRUPT;
TDB_LOG((tdb, TDB_DEBUG_FATAL,"tdb_rec_read bad magic 0x%x at offset=%d\n", rec->magic, offset));
return TDB_ERRCODE(TDB_ERR_CORRUPT, -1);
}
return tdb->methods->tdb_oob(tdb, rec->next+sizeof(*rec), 0);
}
int tdb_rec_write(struct tdb_context *tdb, tdb_off_t offset, struct list_struct *rec)
{
struct list_struct r = *rec;
return tdb->methods->tdb_write(tdb, offset, CONVERT(r), sizeof(r));
}
static const struct tdb_methods io_methods = {
tdb_read,
tdb_write,
tdb_next_hash_chain,
tdb_oob,
tdb_expand_file,
tdb_brlock
};
/*
initialise the default methods table
*/
void tdb_io_init(struct tdb_context *tdb)
{
tdb->methods = &io_methods;
}
Samba/source/lib/tdb/common/lock.c
+342
View File
@@ -0,0 +1,342 @@
/*
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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tdb_private.h"
/* a byte range locking function - return 0 on success
this functions locks/unlocks 1 byte at the specified offset.
On error, errno is also set so that errors are passed back properly
through tdb_open().
note that a len of zero means lock to end of file
*/
int tdb_brlock(struct tdb_context *tdb, tdb_off_t offset,
int rw_type, int lck_type, int probe, size_t len)
{
struct flock fl;
int ret;
if (tdb->flags & TDB_NOLOCK) {
return 0;
}
if ((rw_type == F_WRLCK) && (tdb->read_only || tdb->traverse_read)) {
tdb->ecode = TDB_ERR_RDONLY;
return -1;
}
fl.l_type = rw_type;
fl.l_whence = SEEK_SET;
fl.l_start = offset;
fl.l_len = len;
fl.l_pid = 0;
do {
ret = fcntl(tdb->fd,lck_type,&fl);
} while (ret == -1 && errno == EINTR);
if (ret == -1) {
/* Generic lock error. errno set by fcntl.
* EAGAIN is an expected return from non-blocking
* locks. */
if (!probe && lck_type != F_SETLK) {
/* Ensure error code is set for log fun to examine. */
tdb->ecode = TDB_ERR_LOCK;
TDB_LOG((tdb, TDB_DEBUG_TRACE,"tdb_brlock failed (fd=%d) at offset %d rw_type=%d lck_type=%d len=%d\n",
tdb->fd, offset, rw_type, lck_type, (int)len));
}
return TDB_ERRCODE(TDB_ERR_LOCK, -1);
}
return 0;
}
/*
upgrade a read lock to a write lock. This needs to be handled in a
special way as some OSes (such as solaris) have too conservative
deadlock detection and claim a deadlock when progress can be
made. For those OSes we may loop for a while.
*/
int tdb_brlock_upgrade(struct tdb_context *tdb, tdb_off_t offset, size_t len)
{
int count = 1000;
while (count--) {
struct timeval tv;
if (tdb_brlock(tdb, offset, F_WRLCK, F_SETLKW, 1, len) == 0) {
return 0;
}
if (errno != EDEADLK) {
break;
}
/* sleep for as short a time as we can - more portable than usleep() */
tv.tv_sec = 0;
tv.tv_usec = 1;
select(0, NULL, NULL, NULL, &tv);
}
TDB_LOG((tdb, TDB_DEBUG_TRACE,"tdb_brlock_upgrade failed at offset %d\n", offset));
return -1;
}
/* lock a list in the database. list -1 is the alloc list */
int tdb_lock(struct tdb_context *tdb, int list, int ltype)
{
/* a global lock allows us to avoid per chain locks */
if (tdb->global_lock.count &&
(ltype == tdb->global_lock.ltype || ltype == F_RDLCK)) {
return 0;
}
if (tdb->global_lock.count) {
return TDB_ERRCODE(TDB_ERR_LOCK, -1);
}
if (list < -1 || list >= (int)tdb->header.hash_size) {
TDB_LOG((tdb, TDB_DEBUG_ERROR,"tdb_lock: invalid list %d for ltype=%d\n",
list, ltype));
return -1;
}
if (tdb->flags & TDB_NOLOCK)
return 0;
/* Since fcntl locks don't nest, we do a lock for the first one,
and simply bump the count for future ones */
if (tdb->locked[list+1].count == 0) {
if (tdb->methods->tdb_brlock(tdb,FREELIST_TOP+4*list,ltype,F_SETLKW, 0, 1)) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_lock failed on list %d ltype=%d (%s)\n",
list, ltype, strerror(errno)));
return -1;
}
tdb->locked[list+1].ltype = ltype;
tdb->num_locks++;
}
tdb->locked[list+1].count++;
return 0;
}
/* unlock the database: returns void because it's too late for errors. */
/* changed to return int it may be interesting to know there
has been an error --simo */
int tdb_unlock(struct tdb_context *tdb, int list, int ltype)
{
int ret = -1;
/* a global lock allows us to avoid per chain locks */
if (tdb->global_lock.count &&
(ltype == tdb->global_lock.ltype || ltype == F_RDLCK)) {
return 0;
}
if (tdb->global_lock.count) {
return TDB_ERRCODE(TDB_ERR_LOCK, -1);
}
if (tdb->flags & TDB_NOLOCK)
return 0;
/* Sanity checks */
if (list < -1 || list >= (int)tdb->header.hash_size) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_unlock: list %d invalid (%d)\n", list, tdb->header.hash_size));
return ret;
}
if (tdb->locked[list+1].count==0) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_unlock: count is 0\n"));
return ret;
}
if (tdb->locked[list+1].count == 1) {
/* Down to last nested lock: unlock underneath */
ret = tdb->methods->tdb_brlock(tdb, FREELIST_TOP+4*list, F_UNLCK, F_SETLKW, 0, 1);
tdb->num_locks--;
} else {
ret = 0;
}
tdb->locked[list+1].count--;
if (ret)
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_unlock: An error occurred unlocking!\n"));
return ret;
}
/* lock/unlock entire database */
static int _tdb_lockall(struct tdb_context *tdb, int ltype)
{
/* There are no locks on read-only dbs */
if (tdb->read_only || tdb->traverse_read)
return TDB_ERRCODE(TDB_ERR_LOCK, -1);
if (tdb->global_lock.count && tdb->global_lock.ltype == ltype) {
tdb->global_lock.count++;
return 0;
}
if (tdb->global_lock.count) {
/* a global lock of a different type exists */
return TDB_ERRCODE(TDB_ERR_LOCK, -1);
}
if (tdb->num_locks != 0) {
/* can't combine global and chain locks */
return TDB_ERRCODE(TDB_ERR_LOCK, -1);
}
if (tdb->methods->tdb_brlock(tdb, FREELIST_TOP, ltype, F_SETLKW,
0, 4*tdb->header.hash_size)) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_lockall failed (%s)\n", strerror(errno)));
return -1;
}
tdb->global_lock.count = 1;
tdb->global_lock.ltype = ltype;
return 0;
}
/* unlock entire db */
static int _tdb_unlockall(struct tdb_context *tdb, int ltype)
{
/* There are no locks on read-only dbs */
if (tdb->read_only || tdb->traverse_read) {
return TDB_ERRCODE(TDB_ERR_LOCK, -1);
}
if (tdb->global_lock.ltype != ltype || tdb->global_lock.count == 0) {
return TDB_ERRCODE(TDB_ERR_LOCK, -1);
}
if (tdb->global_lock.count > 1) {
tdb->global_lock.count--;
return 0;
}
if (tdb->methods->tdb_brlock(tdb, FREELIST_TOP, F_UNLCK, F_SETLKW,
0, 4*tdb->header.hash_size)) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_unlockall failed (%s)\n", strerror(errno)));
return -1;
}
tdb->global_lock.count = 0;
tdb->global_lock.ltype = 0;
return 0;
}
/* lock entire database with write lock */
int tdb_lockall(struct tdb_context *tdb)
{
return _tdb_lockall(tdb, F_WRLCK);
}
/* unlock entire database with write lock */
int tdb_unlockall(struct tdb_context *tdb)
{
return _tdb_unlockall(tdb, F_WRLCK);
}
/* lock entire database with read lock */
int tdb_lockall_read(struct tdb_context *tdb)
{
return _tdb_lockall(tdb, F_RDLCK);
}
/* unlock entire database with read lock */
int tdb_unlockall_read(struct tdb_context *tdb)
{
return _tdb_unlockall(tdb, F_RDLCK);
}
/* lock/unlock one hash chain. This is meant to be used to reduce
contention - it cannot guarantee how many records will be locked */
int tdb_chainlock(struct tdb_context *tdb, TDB_DATA key)
{
return tdb_lock(tdb, BUCKET(tdb->hash_fn(&key)), F_WRLCK);
}
int tdb_chainunlock(struct tdb_context *tdb, TDB_DATA key)
{
return tdb_unlock(tdb, BUCKET(tdb->hash_fn(&key)), F_WRLCK);
}
int tdb_chainlock_read(struct tdb_context *tdb, TDB_DATA key)
{
return tdb_lock(tdb, BUCKET(tdb->hash_fn(&key)), F_RDLCK);
}
int tdb_chainunlock_read(struct tdb_context *tdb, TDB_DATA key)
{
return tdb_unlock(tdb, BUCKET(tdb->hash_fn(&key)), F_RDLCK);
}
/* record lock stops delete underneath */
int tdb_lock_record(struct tdb_context *tdb, tdb_off_t off)
{
return off ? tdb->methods->tdb_brlock(tdb, off, F_RDLCK, F_SETLKW, 0, 1) : 0;
}
/*
Write locks override our own fcntl readlocks, so check it here.
Note this is meant to be F_SETLK, *not* F_SETLKW, as it's not
an error to fail to get the lock here.
*/
int tdb_write_lock_record(struct tdb_context *tdb, tdb_off_t off)
{
struct tdb_traverse_lock *i;
for (i = &tdb->travlocks; i; i = i->next)
if (i->off == off)
return -1;
return tdb->methods->tdb_brlock(tdb, off, F_WRLCK, F_SETLK, 1, 1);
}
/*
Note this is meant to be F_SETLK, *not* F_SETLKW, as it's not
an error to fail to get the lock here.
*/
int tdb_write_unlock_record(struct tdb_context *tdb, tdb_off_t off)
{
return tdb->methods->tdb_brlock(tdb, off, F_UNLCK, F_SETLK, 0, 1);
}
/* fcntl locks don't stack: avoid unlocking someone else's */
int tdb_unlock_record(struct tdb_context *tdb, tdb_off_t off)
{
struct tdb_traverse_lock *i;
u32 count = 0;
if (off == 0)
return 0;
for (i = &tdb->travlocks; i; i = i->next)
if (i->off == off)
count++;
return (count == 1 ? tdb->methods->tdb_brlock(tdb, off, F_UNLCK, F_SETLKW, 0, 1) : 0);
}
Samba/source/lib/tdb/common/open.c
+465
View File
@@ -0,0 +1,465 @@
/*
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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tdb_private.h"
/* all contexts, to ensure no double-opens (fcntl locks don't nest!) */
static struct tdb_context *tdbs = NULL;
/* This is based on the hash algorithm from gdbm */
static unsigned int default_tdb_hash(TDB_DATA *key)
{
u32 value; /* Used to compute the hash value. */
u32 i; /* Used to cycle through random values. */
/* Set the initial value from the key size. */
for (value = 0x238F13AF * key->dsize, i=0; i < key->dsize; i++)
value = (value + (key->dptr[i] << (i*5 % 24)));
return (1103515243 * value + 12345);
}
/* initialise a new database with a specified hash size */
static int tdb_new_database(struct tdb_context *tdb, int hash_size)
{
struct tdb_header *newdb;
int size, ret = -1;
/* We make it up in memory, then write it out if not internal */
size = sizeof(struct tdb_header) + (hash_size+1)*sizeof(tdb_off_t);
if (!(newdb = (struct tdb_header *)calloc(size, 1)))
return TDB_ERRCODE(TDB_ERR_OOM, -1);
/* Fill in the header */
newdb->version = TDB_VERSION;
newdb->hash_size = hash_size;
if (tdb->flags & TDB_INTERNAL) {
tdb->map_size = size;
tdb->map_ptr = (char *)newdb;
memcpy(&tdb->header, newdb, sizeof(tdb->header));
/* Convert the `ondisk' version if asked. */
CONVERT(*newdb);
return 0;
}
if (lseek(tdb->fd, 0, SEEK_SET) == -1)
goto fail;
if (ftruncate(tdb->fd, 0) == -1)
goto fail;
/* This creates an endian-converted header, as if read from disk */
CONVERT(*newdb);
memcpy(&tdb->header, newdb, sizeof(tdb->header));
/* Don't endian-convert the magic food! */
memcpy(newdb->magic_food, TDB_MAGIC_FOOD, strlen(TDB_MAGIC_FOOD)+1);
if (write(tdb->fd, newdb, size) != size) {
ret = -1;
} else {
ret = 0;
}
fail:
SAFE_FREE(newdb);
return ret;
}
static int tdb_already_open(dev_t device,
ino_t ino)
{
struct tdb_context *i;
for (i = tdbs; i; i = i->next) {
if (i->device == device && i->inode == ino) {
return 1;
}
}
return 0;
}
/* open the database, creating it if necessary
The open_flags and mode are passed straight to the open call on the
database file. A flags value of O_WRONLY is invalid. The hash size
is advisory, use zero for a default value.
Return is NULL on error, in which case errno is also set. Don't
try to call tdb_error or tdb_errname, just do strerror(errno).
@param name may be NULL for internal databases. */
struct tdb_context *tdb_open(const char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode)
{
return tdb_open_ex(name, hash_size, tdb_flags, open_flags, mode, NULL, NULL);
}
/* a default logging function */
static void null_log_fn(struct tdb_context *tdb, enum tdb_debug_level level, const char *fmt, ...) PRINTF_ATTRIBUTE(3, 4);
static void null_log_fn(struct tdb_context *tdb, enum tdb_debug_level level, const char *fmt, ...)
{
}
struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode,
const struct tdb_logging_context *log_ctx,
tdb_hash_func hash_fn)
{
struct tdb_context *tdb;
struct stat st;
int rev = 0, locked = 0;
unsigned char *vp;
u32 vertest;
if (!(tdb = (struct tdb_context *)calloc(1, sizeof *tdb))) {
/* Can't log this */
errno = ENOMEM;
goto fail;
}
tdb_io_init(tdb);
tdb->fd = -1;
tdb->name = NULL;
tdb->map_ptr = NULL;
tdb->flags = tdb_flags;
tdb->open_flags = open_flags;
if (log_ctx) {
tdb->log = *log_ctx;
} else {
tdb->log.log_fn = null_log_fn;
tdb->log.log_private = NULL;
}
tdb->hash_fn = hash_fn ? hash_fn : default_tdb_hash;
/* cache the page size */
tdb->page_size = getpagesize();
if (tdb->page_size <= 0) {
tdb->page_size = 0x2000;
}
if ((open_flags & O_ACCMODE) == O_WRONLY) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: can't open tdb %s write-only\n",
name));
errno = EINVAL;
goto fail;
}
if (hash_size == 0)
hash_size = DEFAULT_HASH_SIZE;
if ((open_flags & O_ACCMODE) == O_RDONLY) {
tdb->read_only = 1;
/* read only databases don't do locking or clear if first */
tdb->flags |= TDB_NOLOCK;
tdb->flags &= ~TDB_CLEAR_IF_FIRST;
}
/* internal databases don't mmap or lock, and start off cleared */
if (tdb->flags & TDB_INTERNAL) {
tdb->flags |= (TDB_NOLOCK | TDB_NOMMAP);
tdb->flags &= ~TDB_CLEAR_IF_FIRST;
if (tdb_new_database(tdb, hash_size) != 0) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: tdb_new_database failed!"));
goto fail;
}
goto internal;
}
if ((tdb->fd = open(name, open_flags, mode)) == -1) {
TDB_LOG((tdb, TDB_DEBUG_WARNING, "tdb_open_ex: could not open file %s: %s\n",
name, strerror(errno)));
goto fail; /* errno set by open(2) */
}
/* ensure there is only one process initialising at once */
if (tdb->methods->tdb_brlock(tdb, GLOBAL_LOCK, F_WRLCK, F_SETLKW, 0, 1) == -1) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: failed to get global lock on %s: %s\n",
name, strerror(errno)));
goto fail; /* errno set by tdb_brlock */
}
/* we need to zero database if we are the only one with it open */
if ((tdb_flags & TDB_CLEAR_IF_FIRST) &&
(locked = (tdb->methods->tdb_brlock(tdb, ACTIVE_LOCK, F_WRLCK, F_SETLK, 0, 1) == 0))) {
open_flags |= O_CREAT;
if (ftruncate(tdb->fd, 0) == -1) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_open_ex: "
"failed to truncate %s: %s\n",
name, strerror(errno)));
goto fail; /* errno set by ftruncate */
}
}
if (read(tdb->fd, &tdb->header, sizeof(tdb->header)) != sizeof(tdb->header)
|| strcmp(tdb->header.magic_food, TDB_MAGIC_FOOD) != 0
|| (tdb->header.version != TDB_VERSION
&& !(rev = (tdb->header.version==TDB_BYTEREV(TDB_VERSION))))) {
/* its not a valid database - possibly initialise it */
if (!(open_flags & O_CREAT) || tdb_new_database(tdb, hash_size) == -1) {
errno = EIO; /* ie bad format or something */
goto fail;
}
rev = (tdb->flags & TDB_CONVERT);
}
vp = (unsigned char *)&tdb->header.version;
vertest = (((u32)vp[0]) << 24) | (((u32)vp[1]) << 16) |
(((u32)vp[2]) << 8) | (u32)vp[3];
tdb->flags |= (vertest==TDB_VERSION) ? TDB_BIGENDIAN : 0;
if (!rev)
tdb->flags &= ~TDB_CONVERT;
else {
tdb->flags |= TDB_CONVERT;
tdb_convert(&tdb->header, sizeof(tdb->header));
}
if (fstat(tdb->fd, &st) == -1)
goto fail;
if (tdb->header.rwlocks != 0) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: spinlocks no longer supported\n"));
goto fail;
}
/* Is it already in the open list? If so, fail. */
if (tdb_already_open(st.st_dev, st.st_ino)) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: "
"%s (%d,%d) is already open in this process\n",
name, (int)st.st_dev, (int)st.st_ino));
errno = EBUSY;
goto fail;
}
if (!(tdb->name = (char *)strdup(name))) {
errno = ENOMEM;
goto fail;
}
tdb->map_size = st.st_size;
tdb->device = st.st_dev;
tdb->inode = st.st_ino;
tdb->locked = (struct tdb_lock_type *)calloc(tdb->header.hash_size+1,
sizeof(tdb->locked[0]));
if (!tdb->locked) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: "
"failed to allocate lock structure for %s\n",
name));
errno = ENOMEM;
goto fail;
}
tdb_mmap(tdb);
if (locked) {
if (tdb->methods->tdb_brlock(tdb, ACTIVE_LOCK, F_UNLCK, F_SETLK, 0, 1) == -1) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: "
"failed to take ACTIVE_LOCK on %s: %s\n",
name, strerror(errno)));
goto fail;
}
}
/* We always need to do this if the CLEAR_IF_FIRST flag is set, even if
we didn't get the initial exclusive lock as we need to let all other
users know we're using it. */
if (tdb_flags & TDB_CLEAR_IF_FIRST) {
/* leave this lock in place to indicate it's in use */
if (tdb->methods->tdb_brlock(tdb, ACTIVE_LOCK, F_RDLCK, F_SETLKW, 0, 1) == -1)
goto fail;
}
/* if needed, run recovery */
if (tdb_transaction_recover(tdb) == -1) {
goto fail;
}
internal:
/* Internal (memory-only) databases skip all the code above to
* do with disk files, and resume here by releasing their
* global lock and hooking into the active list. */
if (tdb->methods->tdb_brlock(tdb, GLOBAL_LOCK, F_UNLCK, F_SETLKW, 0, 1) == -1)
goto fail;
tdb->next = tdbs;
tdbs = tdb;
return tdb;
fail:
{ int save_errno = errno;
if (!tdb)
return NULL;
if (tdb->map_ptr) {
if (tdb->flags & TDB_INTERNAL)
SAFE_FREE(tdb->map_ptr);
else
tdb_munmap(tdb);
}
SAFE_FREE(tdb->name);
if (tdb->fd != -1)
if (close(tdb->fd) != 0)
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_open_ex: failed to close tdb->fd on error!\n"));
SAFE_FREE(tdb->locked);
SAFE_FREE(tdb);
errno = save_errno;
return NULL;
}
}
/**
* Close a database.
*
* @returns -1 for error; 0 for success.
**/
int tdb_close(struct tdb_context *tdb)
{
struct tdb_context **i;
int ret = 0;
if (tdb->transaction) {
tdb_transaction_cancel(tdb);
}
if (tdb->map_ptr) {
if (tdb->flags & TDB_INTERNAL)
SAFE_FREE(tdb->map_ptr);
else
tdb_munmap(tdb);
}
SAFE_FREE(tdb->name);
if (tdb->fd != -1)
ret = close(tdb->fd);
SAFE_FREE(tdb->locked);
/* Remove from contexts list */
for (i = &tdbs; *i; i = &(*i)->next) {
if (*i == tdb) {
*i = tdb->next;
break;
}
}
memset(tdb, 0, sizeof(*tdb));
SAFE_FREE(tdb);
return ret;
}
/* register a loging function */
void tdb_set_logging_function(struct tdb_context *tdb,
const struct tdb_logging_context *log)
{
tdb->log = *log;
}
void *tdb_get_logging_private(struct tdb_context *tdb)
{
return tdb->log.log_private;
}
/* reopen a tdb - this can be used after a fork to ensure that we have an independent
seek pointer from our parent and to re-establish locks */
int tdb_reopen(struct tdb_context *tdb)
{
struct stat st;
if (tdb->flags & TDB_INTERNAL) {
return 0; /* Nothing to do. */
}
if (tdb->num_locks != 0 || tdb->global_lock.count) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_reopen: reopen not allowed with locks held\n"));
goto fail;
}
if (tdb->transaction != 0) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_reopen: reopen not allowed inside a transaction\n"));
goto fail;
}
if (tdb_munmap(tdb) != 0) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_reopen: munmap failed (%s)\n", strerror(errno)));
goto fail;
}
if (close(tdb->fd) != 0)
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_reopen: WARNING closing tdb->fd failed!\n"));
tdb->fd = open(tdb->name, tdb->open_flags & ~(O_CREAT|O_TRUNC), 0);
if (tdb->fd == -1) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_reopen: open failed (%s)\n", strerror(errno)));
goto fail;
}
if ((tdb->flags & TDB_CLEAR_IF_FIRST) &&
(tdb->methods->tdb_brlock(tdb, ACTIVE_LOCK, F_RDLCK, F_SETLKW, 0, 1) == -1)) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_reopen: failed to obtain active lock\n"));
goto fail;
}
if (fstat(tdb->fd, &st) != 0) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_reopen: fstat failed (%s)\n", strerror(errno)));
goto fail;
}
if (st.st_ino != tdb->inode || st.st_dev != tdb->device) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_reopen: file dev/inode has changed!\n"));
goto fail;
}
tdb_mmap(tdb);
return 0;
fail:
tdb_close(tdb);
return -1;
}
/* reopen all tdb's */
int tdb_reopen_all(int parent_longlived)
{
struct tdb_context *tdb;
for (tdb=tdbs; tdb; tdb = tdb->next) {
/*
* If the parent is longlived (ie. a
* parent daemon architecture), we know
* it will keep it's active lock on a
* tdb opened with CLEAR_IF_FIRST. Thus
* for child processes we don't have to
* add an active lock. This is essential
* to improve performance on systems that
* keep POSIX locks as a non-scalable data
* structure in the kernel.
*/
if (parent_longlived) {
/* Ensure no clear-if-first. */
tdb->flags &= ~TDB_CLEAR_IF_FIRST;
}
if (tdb_reopen(tdb) != 0)
return -1;
}
return 0;
}
Samba/source/lib/tdb/common/tdb.c
+441
View File
@@ -0,0 +1,441 @@
/*
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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tdb_private.h"
TDB_DATA tdb_null;
/*
increment the tdb sequence number if the tdb has been opened using
the TDB_SEQNUM flag
*/
static void tdb_increment_seqnum(struct tdb_context *tdb)
{
tdb_off_t seqnum=0;
if (!(tdb->flags & TDB_SEQNUM)) {
return;
}
if (tdb_brlock(tdb, TDB_SEQNUM_OFS, F_WRLCK, F_SETLKW, 1, 1) != 0) {
return;
}
/* we ignore errors from this, as we have no sane way of
dealing with them.
*/
tdb_ofs_read(tdb, TDB_SEQNUM_OFS, &seqnum);
seqnum++;
tdb_ofs_write(tdb, TDB_SEQNUM_OFS, &seqnum);
tdb_brlock(tdb, TDB_SEQNUM_OFS, F_UNLCK, F_SETLKW, 1, 1);
}
/* Returns 0 on fail. On success, return offset of record, and fills
in rec */
static tdb_off_t tdb_find(struct tdb_context *tdb, TDB_DATA key, u32 hash,
struct list_struct *r)
{
tdb_off_t rec_ptr;
/* read in the hash top */
if (tdb_ofs_read(tdb, TDB_HASH_TOP(hash), &rec_ptr) == -1)
return 0;
/* keep looking until we find the right record */
while (rec_ptr) {
if (tdb_rec_read(tdb, rec_ptr, r) == -1)
return 0;
if (!TDB_DEAD(r) && hash==r->full_hash && key.dsize==r->key_len) {
unsigned char *k;
/* a very likely hit - read the key */
k = tdb_alloc_read(tdb, rec_ptr + sizeof(*r),
r->key_len);
if (!k)
return 0;
if (memcmp(key.dptr, k, key.dsize) == 0) {
SAFE_FREE(k);
return rec_ptr;
}
SAFE_FREE(k);
}
rec_ptr = r->next;
}
return TDB_ERRCODE(TDB_ERR_NOEXIST, 0);
}
/* As tdb_find, but if you succeed, keep the lock */
tdb_off_t tdb_find_lock_hash(struct tdb_context *tdb, TDB_DATA key, u32 hash, int locktype,
struct list_struct *rec)
{
u32 rec_ptr;
if (tdb_lock(tdb, BUCKET(hash), locktype) == -1)
return 0;
if (!(rec_ptr = tdb_find(tdb, key, hash, rec)))
tdb_unlock(tdb, BUCKET(hash), locktype);
return rec_ptr;
}
/* update an entry in place - this only works if the new data size
is <= the old data size and the key exists.
on failure return -1.
*/
static int tdb_update_hash(struct tdb_context *tdb, TDB_DATA key, u32 hash, TDB_DATA dbuf)
{
struct list_struct rec;
tdb_off_t rec_ptr;
/* find entry */
if (!(rec_ptr = tdb_find(tdb, key, hash, &rec)))
return -1;
/* must be long enough key, data and tailer */
if (rec.rec_len < key.dsize + dbuf.dsize + sizeof(tdb_off_t)) {
tdb->ecode = TDB_SUCCESS; /* Not really an error */
return -1;
}
if (tdb->methods->tdb_write(tdb, rec_ptr + sizeof(rec) + rec.key_len,
dbuf.dptr, dbuf.dsize) == -1)
return -1;
if (dbuf.dsize != rec.data_len) {
/* update size */
rec.data_len = dbuf.dsize;
return tdb_rec_write(tdb, rec_ptr, &rec);
}
return 0;
}
/* find an entry in the database given a key */
/* If an entry doesn't exist tdb_err will be set to
* TDB_ERR_NOEXIST. If a key has no data attached
* then the TDB_DATA will have zero length but
* a non-zero pointer
*/
TDB_DATA tdb_fetch(struct tdb_context *tdb, TDB_DATA key)
{
tdb_off_t rec_ptr;
struct list_struct rec;
TDB_DATA ret;
u32 hash;
/* find which hash bucket it is in */
hash = tdb->hash_fn(&key);
if (!(rec_ptr = tdb_find_lock_hash(tdb,key,hash,F_RDLCK,&rec)))
return tdb_null;
ret.dptr = tdb_alloc_read(tdb, rec_ptr + sizeof(rec) + rec.key_len,
rec.data_len);
ret.dsize = rec.data_len;
tdb_unlock(tdb, BUCKET(rec.full_hash), F_RDLCK);
return ret;
}
/* check if an entry in the database exists
note that 1 is returned if the key is found and 0 is returned if not found
this doesn't match the conventions in the rest of this module, but is
compatible with gdbm
*/
static int tdb_exists_hash(struct tdb_context *tdb, TDB_DATA key, u32 hash)
{
struct list_struct rec;
if (tdb_find_lock_hash(tdb, key, hash, F_RDLCK, &rec) == 0)
return 0;
tdb_unlock(tdb, BUCKET(rec.full_hash), F_RDLCK);
return 1;
}
int tdb_exists(struct tdb_context *tdb, TDB_DATA key)
{
u32 hash = tdb->hash_fn(&key);
return tdb_exists_hash(tdb, key, hash);
}
/* actually delete an entry in the database given the offset */
int tdb_do_delete(struct tdb_context *tdb, tdb_off_t rec_ptr, struct list_struct*rec)
{
tdb_off_t last_ptr, i;
struct list_struct lastrec;
if (tdb->read_only || tdb->traverse_read) return -1;
if (tdb_write_lock_record(tdb, rec_ptr) == -1) {
/* Someone traversing here: mark it as dead */
rec->magic = TDB_DEAD_MAGIC;
return tdb_rec_write(tdb, rec_ptr, rec);
}
if (tdb_write_unlock_record(tdb, rec_ptr) != 0)
return -1;
/* find previous record in hash chain */
if (tdb_ofs_read(tdb, TDB_HASH_TOP(rec->full_hash), &i) == -1)
return -1;
for (last_ptr = 0; i != rec_ptr; last_ptr = i, i = lastrec.next)
if (tdb_rec_read(tdb, i, &lastrec) == -1)
return -1;
/* unlink it: next ptr is at start of record. */
if (last_ptr == 0)
last_ptr = TDB_HASH_TOP(rec->full_hash);
if (tdb_ofs_write(tdb, last_ptr, &rec->next) == -1)
return -1;
/* recover the space */
if (tdb_free(tdb, rec_ptr, rec) == -1)
return -1;
return 0;
}
/* delete an entry in the database given a key */
static int tdb_delete_hash(struct tdb_context *tdb, TDB_DATA key, u32 hash)
{
tdb_off_t rec_ptr;
struct list_struct rec;
int ret;
if (!(rec_ptr = tdb_find_lock_hash(tdb, key, hash, F_WRLCK, &rec)))
return -1;
ret = tdb_do_delete(tdb, rec_ptr, &rec);
if (ret == 0) {
tdb_increment_seqnum(tdb);
}
if (tdb_unlock(tdb, BUCKET(rec.full_hash), F_WRLCK) != 0)
TDB_LOG((tdb, TDB_DEBUG_WARNING, "tdb_delete: WARNING tdb_unlock failed!\n"));
return ret;
}
int tdb_delete(struct tdb_context *tdb, TDB_DATA key)
{
u32 hash = tdb->hash_fn(&key);
return tdb_delete_hash(tdb, key, hash);
}
/* store an element in the database, replacing any existing element
with the same key
return 0 on success, -1 on failure
*/
int tdb_store(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf, int flag)
{
struct list_struct rec;
u32 hash;
tdb_off_t rec_ptr;
char *p = NULL;
int ret = 0;
if (tdb->read_only || tdb->traverse_read) {
tdb->ecode = TDB_ERR_RDONLY;
return -1;
}
/* find which hash bucket it is in */
hash = tdb->hash_fn(&key);
if (tdb_lock(tdb, BUCKET(hash), F_WRLCK) == -1)
return -1;
/* check for it existing, on insert. */
if (flag == TDB_INSERT) {
if (tdb_exists_hash(tdb, key, hash)) {
tdb->ecode = TDB_ERR_EXISTS;
goto fail;
}
} else {
/* first try in-place update, on modify or replace. */
if (tdb_update_hash(tdb, key, hash, dbuf) == 0)
goto out;
if (tdb->ecode == TDB_ERR_NOEXIST &&
flag == TDB_MODIFY) {
/* if the record doesn't exist and we are in TDB_MODIFY mode then
we should fail the store */
goto fail;
}
}
/* reset the error code potentially set by the tdb_update() */
tdb->ecode = TDB_SUCCESS;
/* delete any existing record - if it doesn't exist we don't
care. Doing this first reduces fragmentation, and avoids
coalescing with `allocated' block before it's updated. */
if (flag != TDB_INSERT)
tdb_delete_hash(tdb, key, hash);
/* Copy key+value *before* allocating free space in case malloc
fails and we are left with a dead spot in the tdb. */
if (!(p = (char *)malloc(key.dsize + dbuf.dsize))) {
tdb->ecode = TDB_ERR_OOM;
goto fail;
}
memcpy(p, key.dptr, key.dsize);
if (dbuf.dsize)
memcpy(p+key.dsize, dbuf.dptr, dbuf.dsize);
/* we have to allocate some space */
if (!(rec_ptr = tdb_allocate(tdb, key.dsize + dbuf.dsize, &rec)))
goto fail;
/* Read hash top into next ptr */
if (tdb_ofs_read(tdb, TDB_HASH_TOP(hash), &rec.next) == -1)
goto fail;
rec.key_len = key.dsize;
rec.data_len = dbuf.dsize;
rec.full_hash = hash;
rec.magic = TDB_MAGIC;
/* write out and point the top of the hash chain at it */
if (tdb_rec_write(tdb, rec_ptr, &rec) == -1
|| tdb->methods->tdb_write(tdb, rec_ptr+sizeof(rec), p, key.dsize+dbuf.dsize)==-1
|| tdb_ofs_write(tdb, TDB_HASH_TOP(hash), &rec_ptr) == -1) {
/* Need to tdb_unallocate() here */
goto fail;
}
tdb_increment_seqnum(tdb);
out:
SAFE_FREE(p);
tdb_unlock(tdb, BUCKET(hash), F_WRLCK);
return ret;
fail:
ret = -1;
goto out;
}
/* Append to an entry. Create if not exist. */
int tdb_append(struct tdb_context *tdb, TDB_DATA key, TDB_DATA new_dbuf)
{
u32 hash;
TDB_DATA dbuf;
int ret = -1;
/* find which hash bucket it is in */
hash = tdb->hash_fn(&key);
if (tdb_lock(tdb, BUCKET(hash), F_WRLCK) == -1)
return -1;
dbuf = tdb_fetch(tdb, key);
if (dbuf.dptr == NULL) {
dbuf.dptr = malloc(new_dbuf.dsize);
} else {
dbuf.dptr = realloc(dbuf.dptr, dbuf.dsize + new_dbuf.dsize);
}
if (dbuf.dptr == NULL) {
tdb->ecode = TDB_ERR_OOM;
goto failed;
}
memcpy(dbuf.dptr + dbuf.dsize, new_dbuf.dptr, new_dbuf.dsize);
dbuf.dsize += new_dbuf.dsize;
ret = tdb_store(tdb, key, dbuf, 0);
failed:
tdb_unlock(tdb, BUCKET(hash), F_WRLCK);
SAFE_FREE(dbuf.dptr);
return ret;
}
/*
return the name of the current tdb file
useful for external logging functions
*/
const char *tdb_name(struct tdb_context *tdb)
{
return tdb->name;
}
/*
return the underlying file descriptor being used by tdb, or -1
useful for external routines that want to check the device/inode
of the fd
*/
int tdb_fd(struct tdb_context *tdb)
{
return tdb->fd;
}
/*
return the current logging function
useful for external tdb routines that wish to log tdb errors
*/
tdb_log_func tdb_log_fn(struct tdb_context *tdb)
{
return tdb->log.log_fn;
}
/*
get the tdb sequence number. Only makes sense if the writers opened
with TDB_SEQNUM set. Note that this sequence number will wrap quite
quickly, so it should only be used for a 'has something changed'
test, not for code that relies on the count of the number of changes
made. If you want a counter then use a tdb record.
The aim of this sequence number is to allow for a very lightweight
test of a possible tdb change.
*/
int tdb_get_seqnum(struct tdb_context *tdb)
{
tdb_off_t seqnum=0;
tdb_ofs_read(tdb, TDB_SEQNUM_OFS, &seqnum);
return seqnum;
}
int tdb_hash_size(struct tdb_context *tdb)
{
return tdb->header.hash_size;
}
size_t tdb_map_size(struct tdb_context *tdb)
{
return tdb->map_size;
}
int tdb_get_flags(struct tdb_context *tdb)
{
return tdb->flags;
}
Samba/source/lib/tdb/common/tdb_private.h
+202
View File
@@ -0,0 +1,202 @@
/*
Unix SMB/CIFS implementation.
trivial database library - private includes
Copyright (C) Andrew Tridgell 2005
** 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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "replace.h"
#include "system/filesys.h"
#include "system/time.h"
#include "system/shmem.h"
#include "system/select.h"
#include "tdb.h"
#ifndef u32
#define u32 unsigned
#endif
#ifndef HAVE_GETPAGESIZE
#define getpagesize() 0x2000
#endif
typedef u32 tdb_len_t;
typedef u32 tdb_off_t;
#ifndef offsetof
#define offsetof(t,f) ((unsigned int)&((t *)0)->f)
#endif
#define TDB_MAGIC_FOOD "TDB file\n"
#define TDB_VERSION (0x26011967 + 6)
#define TDB_MAGIC (0x26011999U)
#define TDB_FREE_MAGIC (~TDB_MAGIC)
#define TDB_DEAD_MAGIC (0xFEE1DEAD)
#define TDB_RECOVERY_MAGIC (0xf53bc0e7U)
#define TDB_ALIGNMENT 4
#define MIN_REC_SIZE (2*sizeof(struct list_struct) + TDB_ALIGNMENT)
#define DEFAULT_HASH_SIZE 131
#define FREELIST_TOP (sizeof(struct tdb_header))
#define TDB_ALIGN(x,a) (((x) + (a)-1) & ~((a)-1))
#define TDB_BYTEREV(x) (((((x)&0xff)<<24)|((x)&0xFF00)<<8)|(((x)>>8)&0xFF00)|((x)>>24))
#define TDB_DEAD(r) ((r)->magic == TDB_DEAD_MAGIC)
#define TDB_BAD_MAGIC(r) ((r)->magic != TDB_MAGIC && !TDB_DEAD(r))
#define TDB_HASH_TOP(hash) (FREELIST_TOP + (BUCKET(hash)+1)*sizeof(tdb_off_t))
#define TDB_HASHTABLE_SIZE(tdb) ((tdb->header.hash_size+1)*sizeof(tdb_off_t))
#define TDB_DATA_START(hash_size) TDB_HASH_TOP(hash_size-1)
#define TDB_RECOVERY_HEAD offsetof(struct tdb_header, recovery_start)
#define TDB_SEQNUM_OFS offsetof(struct tdb_header, sequence_number)
#define TDB_PAD_BYTE 0x42
#define TDB_PAD_U32 0x42424242
/* NB assumes there is a local variable called "tdb" that is the
* current context, also takes doubly-parenthesized print-style
* argument. */
#define TDB_LOG(x) tdb->log.log_fn x
/* lock offsets */
#define GLOBAL_LOCK 0
#define ACTIVE_LOCK 4
#define TRANSACTION_LOCK 8
/* free memory if the pointer is valid and zero the pointer */
#ifndef SAFE_FREE
#define SAFE_FREE(x) do { if ((x) != NULL) {free(x); (x)=NULL;} } while(0)
#endif
#define BUCKET(hash) ((hash) % tdb->header.hash_size)
#define DOCONV() (tdb->flags & TDB_CONVERT)
#define CONVERT(x) (DOCONV() ? tdb_convert(&x, sizeof(x)) : &x)
/* the body of the database is made of one list_struct for the free space
plus a separate data list for each hash value */
struct list_struct {
tdb_off_t next; /* offset of the next record in the list */
tdb_len_t rec_len; /* total byte length of record */
tdb_len_t key_len; /* byte length of key */
tdb_len_t data_len; /* byte length of data */
u32 full_hash; /* the full 32 bit hash of the key */
u32 magic; /* try to catch errors */
/* the following union is implied:
union {
char record[rec_len];
struct {
char key[key_len];
char data[data_len];
}
u32 totalsize; (tailer)
}
*/
};
/* this is stored at the front of every database */
struct tdb_header {
char magic_food[32]; /* for /etc/magic */
u32 version; /* version of the code */
u32 hash_size; /* number of hash entries */
tdb_off_t rwlocks; /* obsolete - kept to detect old formats */
tdb_off_t recovery_start; /* offset of transaction recovery region */
tdb_off_t sequence_number; /* used when TDB_SEQNUM is set */
tdb_off_t reserved[29];
};
struct tdb_lock_type {
u32 count;
u32 ltype;
};
struct tdb_traverse_lock {
struct tdb_traverse_lock *next;
u32 off;
u32 hash;
int lock_rw;
};
struct tdb_methods {
int (*tdb_read)(struct tdb_context *, tdb_off_t , void *, tdb_len_t , int );
int (*tdb_write)(struct tdb_context *, tdb_off_t, const void *, tdb_len_t);
void (*next_hash_chain)(struct tdb_context *, u32 *);
int (*tdb_oob)(struct tdb_context *, tdb_off_t , int );
int (*tdb_expand_file)(struct tdb_context *, tdb_off_t , tdb_off_t );
int (*tdb_brlock)(struct tdb_context *, tdb_off_t , int, int, int, size_t);
};
struct tdb_context {
char *name; /* the name of the database */
void *map_ptr; /* where it is currently mapped */
int fd; /* open file descriptor for the database */
tdb_len_t map_size; /* how much space has been mapped */
int read_only; /* opened read-only */
int traverse_read; /* read-only traversal */
struct tdb_lock_type global_lock;
struct tdb_lock_type *locked; /* array of chain locks */
enum TDB_ERROR ecode; /* error code for last tdb error */
struct tdb_header header; /* a cached copy of the header */
u32 flags; /* the flags passed to tdb_open */
struct tdb_traverse_lock travlocks; /* current traversal locks */
struct tdb_context *next; /* all tdbs to avoid multiple opens */
dev_t device; /* uniquely identifies this tdb */
ino_t inode; /* uniquely identifies this tdb */
struct tdb_logging_context log;
unsigned int (*hash_fn)(TDB_DATA *key);
int open_flags; /* flags used in the open - needed by reopen */
unsigned int num_locks; /* number of chain locks held */
const struct tdb_methods *methods;
struct tdb_transaction *transaction;
int page_size;
};
/*
internal prototypes
*/
int tdb_munmap(struct tdb_context *tdb);
void tdb_mmap(struct tdb_context *tdb);
int tdb_lock(struct tdb_context *tdb, int list, int ltype);
int tdb_unlock(struct tdb_context *tdb, int list, int ltype);
int tdb_brlock(struct tdb_context *tdb, tdb_off_t offset, int rw_type, int lck_type, int probe, size_t len);
int tdb_brlock_upgrade(struct tdb_context *tdb, tdb_off_t offset, size_t len);
int tdb_write_lock_record(struct tdb_context *tdb, tdb_off_t off);
int tdb_write_unlock_record(struct tdb_context *tdb, tdb_off_t off);
int tdb_ofs_read(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d);
int tdb_ofs_write(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d);
void *tdb_convert(void *buf, u32 size);
int tdb_free(struct tdb_context *tdb, tdb_off_t offset, struct list_struct *rec);
tdb_off_t tdb_allocate(struct tdb_context *tdb, tdb_len_t length, struct list_struct *rec);
int tdb_ofs_read(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d);
int tdb_ofs_write(struct tdb_context *tdb, tdb_off_t offset, tdb_off_t *d);
int tdb_lock_record(struct tdb_context *tdb, tdb_off_t off);
int tdb_unlock_record(struct tdb_context *tdb, tdb_off_t off);
int tdb_rec_read(struct tdb_context *tdb, tdb_off_t offset, struct list_struct *rec);
int tdb_rec_write(struct tdb_context *tdb, tdb_off_t offset, struct list_struct *rec);
int tdb_do_delete(struct tdb_context *tdb, tdb_off_t rec_ptr, struct list_struct *rec);
unsigned char *tdb_alloc_read(struct tdb_context *tdb, tdb_off_t offset, tdb_len_t len);
tdb_off_t tdb_find_lock_hash(struct tdb_context *tdb, TDB_DATA key, u32 hash, int locktype,
struct list_struct *rec);
void tdb_io_init(struct tdb_context *tdb);
int tdb_expand(struct tdb_context *tdb, tdb_off_t size);
Samba/source/lib/tdb/common/transaction.c
+1052
View File
File diff suppressed because it is too large Load Diff
Samba/source/lib/tdb/common/traverse.c
+335
View File
@@ -0,0 +1,335 @@
/*
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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tdb_private.h"
/* Uses traverse lock: 0 = finish, -1 = error, other = record offset */
static int tdb_next_lock(struct tdb_context *tdb, struct tdb_traverse_lock *tlock,
struct list_struct *rec)
{
int want_next = (tlock->off != 0);
/* Lock each chain from the start one. */
for (; tlock->hash < tdb->header.hash_size; tlock->hash++) {
if (!tlock->off && tlock->hash != 0) {
/* this is an optimisation for the common case where
the hash chain is empty, which is particularly
common for the use of tdb with ldb, where large
hashes are used. In that case we spend most of our
time in tdb_brlock(), locking empty hash chains.
To avoid this, we do an unlocked pre-check to see
if the hash chain is empty before starting to look
inside it. If it is empty then we can avoid that
hash chain. If it isn't empty then we can't believe
the value we get back, as we read it without a
lock, so instead we get the lock and re-fetch the
value below.
Notice that not doing this optimisation on the
first hash chain is critical. We must guarantee
that we have done at least one fcntl lock at the
start of a search to guarantee that memory is
coherent on SMP systems. If records are added by
others during the search then thats OK, and we
could possibly miss those with this trick, but we
could miss them anyway without this trick, so the
semantics don't change.
With a non-indexed ldb search this trick gains us a
factor of around 80 in speed on a linux 2.6.x
system (testing using ldbtest).
*/
tdb->methods->next_hash_chain(tdb, &tlock->hash);
if (tlock->hash == tdb->header.hash_size) {
continue;
}
}
if (tdb_lock(tdb, tlock->hash, tlock->lock_rw) == -1)
return -1;
/* No previous record? Start at top of chain. */
if (!tlock->off) {
if (tdb_ofs_read(tdb, TDB_HASH_TOP(tlock->hash),
&tlock->off) == -1)
goto fail;
} else {
/* Otherwise unlock the previous record. */
if (tdb_unlock_record(tdb, tlock->off) != 0)
goto fail;
}
if (want_next) {
/* We have offset of old record: grab next */
if (tdb_rec_read(tdb, tlock->off, rec) == -1)
goto fail;
tlock->off = rec->next;
}
/* Iterate through chain */
while( tlock->off) {
tdb_off_t current;
if (tdb_rec_read(tdb, tlock->off, rec) == -1)
goto fail;
/* Detect infinite loops. From "Shlomi Yaakobovich" <Shlomi@exanet.com>. */
if (tlock->off == rec->next) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_next_lock: loop detected.\n"));
goto fail;
}
if (!TDB_DEAD(rec)) {
/* Woohoo: we found one! */
if (tdb_lock_record(tdb, tlock->off) != 0)
goto fail;
return tlock->off;
}
/* Try to clean dead ones from old traverses */
current = tlock->off;
tlock->off = rec->next;
if (!(tdb->read_only || tdb->traverse_read) &&
tdb_do_delete(tdb, current, rec) != 0)
goto fail;
}
tdb_unlock(tdb, tlock->hash, tlock->lock_rw);
want_next = 0;
}
/* We finished iteration without finding anything */
return TDB_ERRCODE(TDB_SUCCESS, 0);
fail:
tlock->off = 0;
if (tdb_unlock(tdb, tlock->hash, tlock->lock_rw) != 0)
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_next_lock: On error unlock failed!\n"));
return -1;
}
/* traverse the entire database - calling fn(tdb, key, data) on each element.
return -1 on error or the record count traversed
if fn is NULL then it is not called
a non-zero return value from fn() indicates that the traversal should stop
*/
static int tdb_traverse_internal(struct tdb_context *tdb,
tdb_traverse_func fn, void *private_data,
struct tdb_traverse_lock *tl)
{
TDB_DATA key, dbuf;
struct list_struct rec;
int ret, count = 0;
/* This was in the initializaton, above, but the IRIX compiler
* did not like it. crh
*/
tl->next = tdb->travlocks.next;
/* fcntl locks don't stack: beware traverse inside traverse */
tdb->travlocks.next = tl;
/* tdb_next_lock places locks on the record returned, and its chain */
while ((ret = tdb_next_lock(tdb, tl, &rec)) > 0) {
count++;
/* now read the full record */
key.dptr = tdb_alloc_read(tdb, tl->off + sizeof(rec),
rec.key_len + rec.data_len);
if (!key.dptr) {
ret = -1;
if (tdb_unlock(tdb, tl->hash, tl->lock_rw) != 0)
goto out;
if (tdb_unlock_record(tdb, tl->off) != 0)
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_traverse: key.dptr == NULL and unlock_record failed!\n"));
goto out;
}
key.dsize = rec.key_len;
dbuf.dptr = key.dptr + rec.key_len;
dbuf.dsize = rec.data_len;
/* Drop chain lock, call out */
if (tdb_unlock(tdb, tl->hash, tl->lock_rw) != 0) {
ret = -1;
SAFE_FREE(key.dptr);
goto out;
}
if (fn && fn(tdb, key, dbuf, private_data)) {
/* They want us to terminate traversal */
ret = count;
if (tdb_unlock_record(tdb, tl->off) != 0) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_traverse: unlock_record failed!\n"));;
ret = -1;
}
SAFE_FREE(key.dptr);
goto out;
}
SAFE_FREE(key.dptr);
}
out:
tdb->travlocks.next = tl->next;
if (ret < 0)
return -1;
else
return count;
}
/*
a write style traverse - temporarily marks the db read only
*/
int tdb_traverse_read(struct tdb_context *tdb,
tdb_traverse_func fn, void *private_data)
{
struct tdb_traverse_lock tl = { NULL, 0, 0, F_RDLCK };
int ret;
/* we need to get a read lock on the transaction lock here to
cope with the lock ordering semantics of solaris10 */
if (tdb->methods->tdb_brlock(tdb, TRANSACTION_LOCK, F_RDLCK, F_SETLKW, 0, 1) == -1) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_traverse_read: failed to get transaction lock\n"));
tdb->ecode = TDB_ERR_LOCK;
return -1;
}
tdb->traverse_read++;
ret = tdb_traverse_internal(tdb, fn, private_data, &tl);
tdb->traverse_read--;
tdb->methods->tdb_brlock(tdb, TRANSACTION_LOCK, F_UNLCK, F_SETLKW, 0, 1);
return ret;
}
/*
a write style traverse - needs to get the transaction lock to
prevent deadlocks
*/
int tdb_traverse(struct tdb_context *tdb,
tdb_traverse_func fn, void *private_data)
{
struct tdb_traverse_lock tl = { NULL, 0, 0, F_WRLCK };
int ret;
if (tdb->read_only || tdb->traverse_read) {
return tdb_traverse_read(tdb, fn, private_data);
}
if (tdb->methods->tdb_brlock(tdb, TRANSACTION_LOCK, F_WRLCK, F_SETLKW, 0, 1) == -1) {
TDB_LOG((tdb, TDB_DEBUG_ERROR, "tdb_traverse: failed to get transaction lock\n"));
tdb->ecode = TDB_ERR_LOCK;
return -1;
}
ret = tdb_traverse_internal(tdb, fn, private_data, &tl);
tdb->methods->tdb_brlock(tdb, TRANSACTION_LOCK, F_UNLCK, F_SETLKW, 0, 1);
return ret;
}
/* find the first entry in the database and return its key */
TDB_DATA tdb_firstkey(struct tdb_context *tdb)
{
TDB_DATA key;
struct list_struct rec;
/* release any old lock */
if (tdb_unlock_record(tdb, tdb->travlocks.off) != 0)
return tdb_null;
tdb->travlocks.off = tdb->travlocks.hash = 0;
tdb->travlocks.lock_rw = F_RDLCK;
if (tdb_next_lock(tdb, &tdb->travlocks, &rec) <= 0)
return tdb_null;
/* now read the key */
key.dsize = rec.key_len;
key.dptr =tdb_alloc_read(tdb,tdb->travlocks.off+sizeof(rec),key.dsize);
if (tdb_unlock(tdb, BUCKET(tdb->travlocks.hash), F_WRLCK) != 0)
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_firstkey: error occurred while tdb_unlocking!\n"));
return key;
}
/* find the next entry in the database, returning its key */
TDB_DATA tdb_nextkey(struct tdb_context *tdb, TDB_DATA oldkey)
{
u32 oldhash;
TDB_DATA key = tdb_null;
struct list_struct rec;
unsigned char *k = NULL;
/* Is locked key the old key? If so, traverse will be reliable. */
if (tdb->travlocks.off) {
if (tdb_lock(tdb,tdb->travlocks.hash,F_WRLCK))
return tdb_null;
if (tdb_rec_read(tdb, tdb->travlocks.off, &rec) == -1
|| !(k = tdb_alloc_read(tdb,tdb->travlocks.off+sizeof(rec),
rec.key_len))
|| memcmp(k, oldkey.dptr, oldkey.dsize) != 0) {
/* No, it wasn't: unlock it and start from scratch */
if (tdb_unlock_record(tdb, tdb->travlocks.off) != 0) {
SAFE_FREE(k);
return tdb_null;
}
if (tdb_unlock(tdb, tdb->travlocks.hash, F_WRLCK) != 0) {
SAFE_FREE(k);
return tdb_null;
}
tdb->travlocks.off = 0;
}
SAFE_FREE(k);
}
if (!tdb->travlocks.off) {
/* No previous element: do normal find, and lock record */
tdb->travlocks.off = tdb_find_lock_hash(tdb, oldkey, tdb->hash_fn(&oldkey), F_WRLCK, &rec);
if (!tdb->travlocks.off)
return tdb_null;
tdb->travlocks.hash = BUCKET(rec.full_hash);
if (tdb_lock_record(tdb, tdb->travlocks.off) != 0) {
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_nextkey: lock_record failed (%s)!\n", strerror(errno)));
return tdb_null;
}
}
oldhash = tdb->travlocks.hash;
/* Grab next record: locks chain and returned record,
unlocks old record */
if (tdb_next_lock(tdb, &tdb->travlocks, &rec) > 0) {
key.dsize = rec.key_len;
key.dptr = tdb_alloc_read(tdb, tdb->travlocks.off+sizeof(rec),
key.dsize);
/* Unlock the chain of this new record */
if (tdb_unlock(tdb, tdb->travlocks.hash, F_WRLCK) != 0)
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_nextkey: WARNING tdb_unlock failed!\n"));
}
/* Unlock the chain of old record */
if (tdb_unlock(tdb, BUCKET(oldhash), F_WRLCK) != 0)
TDB_LOG((tdb, TDB_DEBUG_FATAL, "tdb_nextkey: WARNING tdb_unlock failed!\n"));
return key;
}
Samba/source/lib/tdb/config.guess
Vendored Executable
+1466
View File
File diff suppressed because it is too large Load Diff
Samba/source/lib/tdb/config.mk
+70
View File
@@ -0,0 +1,70 @@
################################################
# Start SUBSYSTEM LIBTDB
[LIBRARY::LIBTDB]
VERSION = 0.0.1
SO_VERSION = 0
DESCRIPTION = Trivial Database Library
OBJ_FILES = \
common/tdb.o common/dump.o common/io.o common/lock.o \
common/open.o common/traverse.o common/freelist.o \
common/error.o common/transaction.o
CFLAGS = -Ilib/tdb/include
PUBLIC_HEADERS = include/tdb.h
#
# End SUBSYSTEM ldb
################################################
################################################
# Start BINARY tdbtool
[BINARY::tdbtool]
INSTALLDIR = BINDIR
ENABLE = NO
OBJ_FILES= \
tools/tdbtool.o
PRIVATE_DEPENDENCIES = \
LIBTDB
# End BINARY tdbtool
################################################
################################################
# Start BINARY tdbtorture
[BINARY::tdbtorture]
INSTALLDIR = BINDIR
OBJ_FILES= \
tools/tdbtorture.o
PRIVATE_DEPENDENCIES = \
LIBTDB
# End BINARY tdbtorture
################################################
################################################
# Start BINARY tdbdump
[BINARY::tdbdump]
INSTALLDIR = BINDIR
OBJ_FILES= \
tools/tdbdump.o
PRIVATE_DEPENDENCIES = \
LIBTDB
# End BINARY tdbdump
################################################
################################################
# Start BINARY tdbbackup
[BINARY::tdbbackup]
INSTALLDIR = BINDIR
ENABLE = NO
OBJ_FILES= \
tools/tdbbackup.o
PRIVATE_DEPENDENCIES = \
LIBTDB
# End BINARY tdbbackup
################################################
#######################
# Start LIBRARY swig_tdb
[LIBRARY::swig_tdb]
LIBRARY_REALNAME = swig/_tdb.$(SHLIBEXT)
OBJ_FILES = swig/tdb_wrap.o
PUBLIC_DEPENDENCIES = LIBTDB DYNCONFIG
# End LIBRARY swig_tdb
#######################
Samba/source/lib/tdb/config.sub
Vendored Executable
+1579
View File
File diff suppressed because it is too large Load Diff
Samba/source/lib/tdb/configure.ac
+10
View File
@@ -0,0 +1,10 @@
AC_PREREQ(2.50)
AC_DEFUN([SMB_MODULE_DEFAULT], [echo -n ""])
AC_DEFUN([SMB_LIBRARY_ENABLE], [echo -n ""])
AC_DEFUN([SMB_ENABLE], [echo -n ""])
AC_INIT(include/tdb.h)
AC_CONFIG_SRCDIR([common/tdb.c])
AC_CONFIG_HEADER(include/config.h)
AC_LIBREPLACE_ALL_CHECKS
m4_include(libtdb.m4)
AC_OUTPUT(Makefile tdb.pc)
Samba/source/lib/tdb/docs/README
+235
View File
@@ -0,0 +1,235 @@
tdb - a trivial database system
tridge@linuxcare.com December 1999
==================================
This is a simple database API. It was inspired by the realisation that
in Samba we have several ad-hoc bits of code that essentially
implement small databases for sharing structures between parts of
Samba. As I was about to add another I realised that a generic
database module was called for to replace all the ad-hoc bits.
I based the interface on gdbm. I couldn't use gdbm as we need to be
able to have multiple writers to the databases at one time.
Compilation
-----------
add HAVE_MMAP=1 to use mmap instead of read/write
add NOLOCK=1 to disable locking code
Testing
-------
Compile tdbtest.c and link with gdbm for testing. tdbtest will perform
identical operations via tdb and gdbm then make sure the result is the
same
Also included is tdbtool, which allows simple database manipulation
on the commandline.
tdbtest and tdbtool are not built as part of Samba, but are included
for completeness.
Interface
---------
The interface is very similar to gdbm except for the following:
- different open interface. The tdb_open call is more similar to a
traditional open()
- no tdbm_reorganise() function
- no tdbm_sync() function. No operations are cached in the library anyway
- added a tdb_traverse() function for traversing the whole database
- added transactions support
A general rule for using tdb is that the caller frees any returned
TDB_DATA structures. Just call free(p.dptr) to free a TDB_DATA
return value called p. This is the same as gdbm.
here is a full list of tdb functions with brief descriptions.
----------------------------------------------------------------------
TDB_CONTEXT *tdb_open(char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode)
open the database, creating it if necessary
The open_flags and mode are passed straight to the open call on the database
file. A flags value of O_WRONLY is invalid
The hash size is advisory, use zero for a default value.
return is NULL on error
possible tdb_flags are:
TDB_CLEAR_IF_FIRST - clear database if we are the only one with it open
TDB_INTERNAL - don't use a file, instaed store the data in
memory. The filename is ignored in this case.
TDB_NOLOCK - don't do any locking
TDB_NOMMAP - don't use mmap
TDB_NOSYNC - don't synchronise transactions to disk
----------------------------------------------------------------------
TDB_CONTEXT *tdb_open_ex(char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode,
tdb_log_func log_fn,
tdb_hash_func hash_fn)
This is like tdb_open(), but allows you to pass an initial logging and
hash function. Be careful when passing a hash function - all users of
the database must use the same hash function or you will get data
corruption.
----------------------------------------------------------------------
char *tdb_error(TDB_CONTEXT *tdb);
return a error string for the last tdb error
----------------------------------------------------------------------
int tdb_close(TDB_CONTEXT *tdb);
close a database
----------------------------------------------------------------------
int tdb_update(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf);
update an entry in place - this only works if the new data size
is <= the old data size and the key exists.
on failure return -1
----------------------------------------------------------------------
TDB_DATA tdb_fetch(TDB_CONTEXT *tdb, TDB_DATA key);
fetch an entry in the database given a key
if the return value has a null dptr then a error occurred
caller must free the resulting data
----------------------------------------------------------------------
int tdb_exists(TDB_CONTEXT *tdb, TDB_DATA key);
check if an entry in the database exists
note that 1 is returned if the key is found and 0 is returned if not found
this doesn't match the conventions in the rest of this module, but is
compatible with gdbm
----------------------------------------------------------------------
int tdb_traverse(TDB_CONTEXT *tdb, int (*fn)(TDB_CONTEXT *tdb,
TDB_DATA key, TDB_DATA dbuf, void *state), void *state);
traverse the entire database - calling fn(tdb, key, data, state) on each
element.
return -1 on error or the record count traversed
if fn is NULL then it is not called
a non-zero return value from fn() indicates that the traversal
should stop. Traversal callbacks may not start transactions.
----------------------------------------------------------------------
int tdb_traverse_read(TDB_CONTEXT *tdb, int (*fn)(TDB_CONTEXT *tdb,
TDB_DATA key, TDB_DATA dbuf, void *state), void *state);
traverse the entire database - calling fn(tdb, key, data, state) on
each element, but marking the database read only during the
traversal, so any write operations will fail. This allows tdb to
use read locks, which increases the parallelism possible during the
traversal.
return -1 on error or the record count traversed
if fn is NULL then it is not called
a non-zero return value from fn() indicates that the traversal
should stop. Traversal callbacks may not start transactions.
----------------------------------------------------------------------
TDB_DATA tdb_firstkey(TDB_CONTEXT *tdb);
find the first entry in the database and return its key
the caller must free the returned data
----------------------------------------------------------------------
TDB_DATA tdb_nextkey(TDB_CONTEXT *tdb, TDB_DATA key);
find the next entry in the database, returning its key
the caller must free the returned data
----------------------------------------------------------------------
int tdb_delete(TDB_CONTEXT *tdb, TDB_DATA key);
delete an entry in the database given a key
----------------------------------------------------------------------
int tdb_store(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, int flag);
store an element in the database, replacing any existing element
with the same key
If flag==TDB_INSERT then don't overwrite an existing entry
If flag==TDB_MODIFY then don't create a new entry
return 0 on success, -1 on failure
----------------------------------------------------------------------
int tdb_writelock(TDB_CONTEXT *tdb);
lock the database. If we already have it locked then don't do anything
----------------------------------------------------------------------
int tdb_writeunlock(TDB_CONTEXT *tdb);
unlock the database
----------------------------------------------------------------------
int tdb_lockchain(TDB_CONTEXT *tdb, TDB_DATA key);
lock one hash chain. This is meant to be used to reduce locking
contention - it cannot guarantee how many records will be locked
----------------------------------------------------------------------
int tdb_unlockchain(TDB_CONTEXT *tdb, TDB_DATA key);
unlock one hash chain
----------------------------------------------------------------------
int tdb_transaction_start(TDB_CONTEXT *tdb)
start a transaction. All operations after the transaction start can
either be committed with tdb_transaction_commit() or cancelled with
tdb_transaction_cancel().
If you call tdb_transaction_start() again on the same tdb context
while a transaction is in progress, then the same transaction
buffer is re-used. The number of tdb_transaction_{commit,cancel}
operations must match the number of successful
tdb_transaction_start() calls.
Note that transactions are by default disk synchronous, and use a
recover area in the database to automatically recover the database
on the next open if the system crashes during a transaction. You
can disable the synchronous transaction recovery setup using the
TDB_NOSYNC flag, which will greatly speed up operations at the risk
of corrupting your database if the system crashes.
Operations made within a transaction are not visible to other users
of the database until a successful commit.
----------------------------------------------------------------------
int tdb_transaction_cancel(TDB_CONTEXT *tdb)
cancel a current transaction, discarding all write and lock
operations that have been made since the transaction started.
----------------------------------------------------------------------
int tdb_transaction_commit(TDB_CONTEXT *tdb)
commit a current transaction, updating the database and releasing
the transaction locks.
Samba/source/lib/tdb/docs/tdb.magic
+10
View File
@@ -0,0 +1,10 @@
# Magic file(1) information about tdb files.
#
# Install this into /etc/magic or the corresponding location for your
# system, or pass as a -m argument to file(1).
# You may use and redistribute this file without restriction.
0 string TDB\ file TDB database
>32 lelong =0x2601196D version 6, little-endian
>>36 lelong x hash size %d bytes
Samba/source/lib/tdb/include/tdb.h
+147
View File
@@ -0,0 +1,147 @@
#ifndef __TDB_H__
#define __TDB_H__
/*
Unix SMB/CIFS implementation.
trivial database library
Copyright (C) Andrew Tridgell 1999-2004
** 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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef __cplusplus
extern "C" {
#endif
/* flags to tdb_store() */
#define TDB_REPLACE 1
#define TDB_INSERT 2
#define TDB_MODIFY 3
/* flags for tdb_open() */
#define TDB_DEFAULT 0 /* just a readability place holder */
#define TDB_CLEAR_IF_FIRST 1
#define TDB_INTERNAL 2 /* don't store on disk */
#define TDB_NOLOCK 4 /* don't do any locking */
#define TDB_NOMMAP 8 /* don't use mmap */
#define TDB_CONVERT 16 /* convert endian (internal use) */
#define TDB_BIGENDIAN 32 /* header is big-endian (internal use) */
#define TDB_NOSYNC 64 /* don't use synchronous transactions */
#define TDB_SEQNUM 128 /* maintain a sequence number */
#define TDB_ERRCODE(code, ret) ((tdb->ecode = (code)), ret)
/* error codes */
enum TDB_ERROR {TDB_SUCCESS=0, TDB_ERR_CORRUPT, TDB_ERR_IO, TDB_ERR_LOCK,
TDB_ERR_OOM, TDB_ERR_EXISTS, TDB_ERR_NOLOCK, TDB_ERR_LOCK_TIMEOUT,
TDB_ERR_NOEXIST, TDB_ERR_EINVAL, TDB_ERR_RDONLY};
/* debugging uses one of the following levels */
enum tdb_debug_level {TDB_DEBUG_FATAL = 0, TDB_DEBUG_ERROR,
TDB_DEBUG_WARNING, TDB_DEBUG_TRACE};
typedef struct TDB_DATA {
unsigned char *dptr;
size_t dsize;
} TDB_DATA;
#ifndef PRINTF_ATTRIBUTE
#if (__GNUC__ >= 3)
/** Use gcc attribute to check printf fns. a1 is the 1-based index of
* the parameter containing the format, and a2 the index of the first
* argument. Note that some gcc 2.x versions don't handle this
* properly **/
#define PRINTF_ATTRIBUTE(a1, a2) __attribute__ ((format (__printf__, a1, a2)))
#else
#define PRINTF_ATTRIBUTE(a1, a2)
#endif
#endif
/* this is the context structure that is returned from a db open */
typedef struct tdb_context TDB_CONTEXT;
typedef int (*tdb_traverse_func)(struct tdb_context *, TDB_DATA, TDB_DATA, void *);
typedef void (*tdb_log_func)(struct tdb_context *, enum tdb_debug_level, const char *, ...) PRINTF_ATTRIBUTE(3, 4);
typedef unsigned int (*tdb_hash_func)(TDB_DATA *key);
struct tdb_logging_context {
tdb_log_func log_fn;
void *log_private;
};
struct tdb_context *tdb_open(const char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode);
struct tdb_context *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode,
const struct tdb_logging_context *log_ctx,
tdb_hash_func hash_fn);
int tdb_reopen(struct tdb_context *tdb);
int tdb_reopen_all(int parent_longlived);
void tdb_set_logging_function(struct tdb_context *tdb, const struct tdb_logging_context *log);
enum TDB_ERROR tdb_error(struct tdb_context *tdb);
const char *tdb_errorstr(struct tdb_context *tdb);
TDB_DATA tdb_fetch(struct tdb_context *tdb, TDB_DATA key);
int tdb_delete(struct tdb_context *tdb, TDB_DATA key);
int tdb_store(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf, int flag);
int tdb_append(struct tdb_context *tdb, TDB_DATA key, TDB_DATA new_dbuf);
int tdb_close(struct tdb_context *tdb);
TDB_DATA tdb_firstkey(struct tdb_context *tdb);
TDB_DATA tdb_nextkey(struct tdb_context *tdb, TDB_DATA key);
int tdb_traverse(struct tdb_context *tdb, tdb_traverse_func fn, void *);
int tdb_traverse_read(struct tdb_context *tdb, tdb_traverse_func fn, void *);
int tdb_exists(struct tdb_context *tdb, TDB_DATA key);
int tdb_lockall(struct tdb_context *tdb);
int tdb_unlockall(struct tdb_context *tdb);
int tdb_lockall_read(struct tdb_context *tdb);
int tdb_unlockall_read(struct tdb_context *tdb);
const char *tdb_name(struct tdb_context *tdb);
int tdb_fd(struct tdb_context *tdb);
tdb_log_func tdb_log_fn(struct tdb_context *tdb);
void *tdb_get_logging_private(struct tdb_context *tdb);
int tdb_transaction_start(struct tdb_context *tdb);
int tdb_transaction_commit(struct tdb_context *tdb);
int tdb_transaction_cancel(struct tdb_context *tdb);
int tdb_transaction_recover(struct tdb_context *tdb);
int tdb_get_seqnum(struct tdb_context *tdb);
int tdb_hash_size(struct tdb_context *tdb);
size_t tdb_map_size(struct tdb_context *tdb);
int tdb_get_flags(struct tdb_context *tdb);
/* Low level locking functions: use with care */
int tdb_chainlock(struct tdb_context *tdb, TDB_DATA key);
int tdb_chainunlock(struct tdb_context *tdb, TDB_DATA key);
int tdb_chainlock_read(struct tdb_context *tdb, TDB_DATA key);
int tdb_chainunlock_read(struct tdb_context *tdb, TDB_DATA key);
/* Debug functions. Not used in production. */
void tdb_dump_all(struct tdb_context *tdb);
int tdb_printfreelist(struct tdb_context *tdb);
int tdb_validate_freelist(struct tdb_context *tdb, int *pnum_entries);
extern TDB_DATA tdb_null;
#ifdef __cplusplus
}
#endif
#endif /* tdb.h */
Samba/source/lib/tdb/install-sh
Executable
+238
View File
@@ -0,0 +1,238 @@
#! /bin/sh
#
# install - install a program, script, or datafile
# This comes from X11R5.
#
# Calling this script install-sh is preferred over install.sh, to prevent
# `make' implicit rules from creating a file called install from it
# when there is no Makefile.
#
# This script is compatible with the BSD install script, but was written
# from scratch.
#
# set DOITPROG to echo to test this script
# Don't use :- since 4.3BSD and earlier shells don't like it.
doit="${DOITPROG-}"
# put in absolute paths if you don't have them in your path; or use env. vars.
mvprog="${MVPROG-mv}"
cpprog="${CPPROG-cp}"
chmodprog="${CHMODPROG-chmod}"
chownprog="${CHOWNPROG-chown}"
chgrpprog="${CHGRPPROG-chgrp}"
stripprog="${STRIPPROG-strip}"
rmprog="${RMPROG-rm}"
mkdirprog="${MKDIRPROG-mkdir}"
transformbasename=""
transform_arg=""
instcmd="$mvprog"
chmodcmd="$chmodprog 0755"
chowncmd=""
chgrpcmd=""
stripcmd=""
rmcmd="$rmprog -f"
mvcmd="$mvprog"
src=""
dst=""
dir_arg=""
while [ x"$1" != x ]; do
case $1 in
-c) instcmd="$cpprog"
shift
continue;;
-d) dir_arg=true
shift
continue;;
-m) chmodcmd="$chmodprog $2"
shift
shift
continue;;
-o) chowncmd="$chownprog $2"
shift
shift
continue;;
-g) chgrpcmd="$chgrpprog $2"
shift
shift
continue;;
-s) stripcmd="$stripprog"
shift
continue;;
-t=*) transformarg=`echo $1 | sed 's/-t=//'`
shift
continue;;
-b=*) transformbasename=`echo $1 | sed 's/-b=//'`
shift
continue;;
*) if [ x"$src" = x ]
then
src=$1
else
# this colon is to work around a 386BSD /bin/sh bug
:
dst=$1
fi
shift
continue;;
esac
done
if [ x"$src" = x ]
then
echo "install: no input file specified"
exit 1
else
true
fi
if [ x"$dir_arg" != x ]; then
dst=$src
src=""
if [ -d $dst ]; then
instcmd=:
else
instcmd=mkdir
fi
else
# Waiting for this to be detected by the "$instcmd $src $dsttmp" command
# might cause directories to be created, which would be especially bad
# if $src (and thus $dsttmp) contains '*'.
if [ -f $src -o -d $src ]
then
true
else
echo "install: $src does not exist"
exit 1
fi
if [ x"$dst" = x ]
then
echo "install: no destination specified"
exit 1
else
true
fi
# If destination is a directory, append the input filename; if your system
# does not like double slashes in filenames, you may need to add some logic
if [ -d $dst ]
then
dst="$dst"/`basename $src`
else
true
fi
fi
## this sed command emulates the dirname command
dstdir=`echo $dst | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'`
# Make sure that the destination directory exists.
# this part is taken from Noah Friedman's mkinstalldirs script
# Skip lots of stat calls in the usual case.
if [ ! -d "$dstdir" ]; then
defaultIFS='
'
IFS="${IFS-${defaultIFS}}"
oIFS="${IFS}"
# Some sh's can't handle IFS=/ for some reason.
IFS='%'
set - `echo ${dstdir} | sed -e 's@/@%@g' -e 's@^%@/@'`
IFS="${oIFS}"
pathcomp=''
while [ $# -ne 0 ] ; do
pathcomp="${pathcomp}${1}"
shift
if [ ! -d "${pathcomp}" ] ;
then
$mkdirprog "${pathcomp}"
else
true
fi
pathcomp="${pathcomp}/"
done
fi
if [ x"$dir_arg" != x ]
then
$doit $instcmd $dst &&
if [ x"$chowncmd" != x ]; then $doit $chowncmd $dst; else true ; fi &&
if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dst; else true ; fi &&
if [ x"$stripcmd" != x ]; then $doit $stripcmd $dst; else true ; fi &&
if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dst; else true ; fi
else
# If we're going to rename the final executable, determine the name now.
if [ x"$transformarg" = x ]
then
dstfile=`basename $dst`
else
dstfile=`basename $dst $transformbasename |
sed $transformarg`$transformbasename
fi
# don't allow the sed command to completely eliminate the filename
if [ x"$dstfile" = x ]
then
dstfile=`basename $dst`
else
true
fi
# Make a temp file name in the proper directory.
dsttmp=$dstdir/#inst.$$#
# Move or copy the file name to the temp name
$doit $instcmd $src $dsttmp &&
trap "rm -f ${dsttmp}" 0 &&
# and set any options; do chmod last to preserve setuid bits
# If any of these fail, we abort the whole thing. If we want to
# ignore errors from any of these, just make sure not to ignore
# errors from the above "$doit $instcmd $src $dsttmp" command.
if [ x"$chowncmd" != x ]; then $doit $chowncmd $dsttmp; else true;fi &&
if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dsttmp; else true;fi &&
if [ x"$stripcmd" != x ]; then $doit $stripcmd $dsttmp; else true;fi &&
if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dsttmp; else true;fi &&
# Now rename the file to the real destination.
$doit $rmcmd -f $dstdir/$dstfile &&
$doit $mvcmd $dsttmp $dstdir/$dstfile
fi &&
exit 0
Samba/source/lib/tdb/libtdb.m4
+56
View File
@@ -0,0 +1,56 @@
dnl find the tdb sources. This is meant to work both for
dnl tdb standalone builds, and builds of packages using tdb
tdbdir=""
tdbpaths="$srcdir $srcdir/lib/tdb $srcdir/tdb $srcdir/../tdb"
for d in $tdbpaths; do
if test -f "$d/common/tdb.c"; then
tdbdir="$d"
AC_SUBST(tdbdir)
break;
fi
done
if test x"$tdbdir" = "x"; then
AC_MSG_ERROR([cannot find tdb source in $tdbpaths])
fi
TDBOBJ="common/tdb.o common/dump.o common/transaction.o common/error.o common/traverse.o"
TDBOBJ="$TDBOBJ common/freelist.o common/freelistcheck.o common/io.o common/lock.o common/open.o"
AC_SUBST(TDBOBJ)
AC_SUBST(LIBREPLACEOBJ)
AC_CHECK_FUNCS(mmap pread pwrite getpagesize utime)
AC_CHECK_HEADERS(getopt.h sys/select.h sys/time.h)
AC_HAVE_DECL(pread, [#include <unistd.h>])
AC_HAVE_DECL(pwrite, [#include <unistd.h>])
AC_MSG_CHECKING([for Python])
PYTHON=
AC_ARG_WITH(python,
[ --with-python=PYTHONNAME build Python libraries],
[ case "${withval-python}" in
yes)
PYTHON=python
;;
no)
PYTHON=
;;
*)
PYTHON=${withval-python}
;;
esac ])
if test x"$PYTHON" != "x"; then
incdir=`python -c 'import sys; print "%s/include/python%d.%d" % (sys.prefix, sys.version_info[[0]], sys.version_info[[1]])'`
CPPFLAGS="$CPPFLAGS -I $incdir"
fi
if test x"$PYTHON" != "x"; then
AC_MSG_RESULT([${withval-python}])
else
SMB_ENABLE(swig_tdb, NO)
AC_MSG_RESULT(no)
fi
AC_SUBST(PYTHON)
Samba/source/lib/tdb/swig/Tdb.py
+116
View File
@@ -0,0 +1,116 @@
"""Provide a more Pythonic and object-oriented interface to tdb."""
#
# Swig interface to Samba
#
# Copyright (C) Tim Potter 2006
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
import os
from tdb import *
# Open flags
DEFAULT = TDB_DEFAULT
CLEAR_IF_FIRST = TDB_CLEAR_IF_FIRST
INTERNAL = TDB_INTERNAL
NOLOCK = TDB_NOLOCK
NOMMAP = TDB_NOMMAP
# Class representing a TDB file
class Tdb:
# Create and destroy Tdb objects
def __init__(self, name, hash_size = 0, flags = TDB_DEFAULT,
open_flags = os.O_RDWR | os.O_CREAT, mode = 0600):
self.tdb = tdb_open(name, hash_size, flags, open_flags, mode)
if self.tdb is None:
raise IOError, tdb_errorstr(self.tdb)
def __del__(self):
self.close()
def close(self):
if hasattr(self, 'tdb') and self.tdb is not None:
if tdb_close(self.tdb) == -1:
raise IOError, tdb_errorstr(self.tdb)
self.tdb = None
# Random access to keys, values
def __getitem__(self, key):
result = tdb_fetch(self.tdb, key)
if result is None:
raise KeyError, '%s: %s' % (key, tdb_errorstr(self.tdb))
return result
def __setitem__(self, key, item):
if tdb_store(self.tdb, key, item) == -1:
raise IOError, tdb_errorstr(self.tdb)
def __delitem__(self, key):
if not tdb_exists(self.tdb, key):
raise KeyError, '%s: %s' % (key, tdb_errorstr(self.tdb))
tdb_delete(self.tdb, key)
def has_key(self, key):
return tdb_exists(self.tdb, key)
# Tdb iterator
class TdbIterator:
def __init__(self, tdb):
self.tdb = tdb
self.key = None
def __iter__(self):
return self
def next(self):
if self.key is None:
self.key = tdb_firstkey(self.tdb)
if self.key is None:
raise StopIteration
return self.key
else:
self.key = tdb_nextkey(self.tdb, self.key)
if self.key is None:
raise StopIteration
return self.key
def __iter__(self):
return Tdb.TdbIterator(self.tdb)
# Implement other dict functions using TdbIterator
def keys(self):
return [k for k in iter(self)]
def values(self):
return [self[k] for k in iter(self)]
def items(self):
return [(k, self[k]) for k in iter(self)]
def __len__(self):
return len(self.keys())
def clear(self):
for k in iter(self):
del(self[k])
Samba/source/lib/tdb/swig/tdb.i
+168
View File
@@ -0,0 +1,168 @@
/*
Unix SMB/CIFS implementation.
Swig interface to tdb.
Copyright (C) 2004,2005 Tim Potter <tpot@samba.org>
** 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 2 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, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
%module tdb
%{
/* This symbol is used in both includes.h and Python.h which causes an
annoying compiler warning. */
#ifdef HAVE_FSTAT
#undef HAVE_FSTAT
#endif
#if (__GNUC__ >= 3)
/** Use gcc attribute to check printf fns. a1 is the 1-based index of
* the parameter containing the format, and a2 the index of the first
* argument. Note that some gcc 2.x versions don't handle this
* properly **/
#define PRINTF_ATTRIBUTE(a1, a2) __attribute__ ((format (__printf__, a1, a2)))
#else
#define PRINTF_ATTRIBUTE(a1, a2)
#endif
/* Include tdb headers */
#include "lib/tdb/include/tdb.h"
%}
/* The tdb functions will crash if a NULL tdb context is passed */
%include exception.i
%typemap(check) TDB_CONTEXT* {
if ($1 == NULL)
SWIG_exception(SWIG_ValueError,
"tdb context must be non-NULL");
}
/* In and out typemaps for the TDB_DATA structure. This is converted to
and from the Python string type which can contain arbitrary binary
data.. */
%typemap(in) TDB_DATA {
if (!PyString_Check($input)) {
PyErr_SetString(PyExc_TypeError, "string arg expected");
return NULL;
}
$1.dsize = PyString_Size($input);
$1.dptr = PyString_AsString($input);
}
%typemap(out) TDB_DATA {
if ($1.dptr == NULL && $1.dsize == 0) {
$result = Py_None;
} else {
$result = PyString_FromStringAndSize($1.dptr, $1.dsize);
free($1.dptr);
}
}
/* Treat a mode_t as an unsigned integer */
typedef int mode_t;
/* flags to tdb_store() */
#define TDB_REPLACE 1
#define TDB_INSERT 2
#define TDB_MODIFY 3
/* flags for tdb_open() */
#define TDB_DEFAULT 0 /* just a readability place holder */
#define TDB_CLEAR_IF_FIRST 1
#define TDB_INTERNAL 2 /* don't store on disk */
#define TDB_NOLOCK 4 /* don't do any locking */
#define TDB_NOMMAP 8 /* don't use mmap */
#define TDB_CONVERT 16 /* convert endian (internal use) */
#define TDB_BIGENDIAN 32 /* header is big-endian (internal use) */
/* Throw an IOError exception if tdb_open() or tdb_open_ex() returns NULL */
%exception {
$action
if (result == NULL) {
PyErr_SetFromErrno(PyExc_IOError);
SWIG_fail;
}
}
TDB_CONTEXT *tdb_open(const char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode);
TDB_CONTEXT *tdb_open_ex(const char *name, int hash_size, int tdb_flags,
int open_flags, mode_t mode,
tdb_log_func log_fn,
tdb_hash_func hash_fn);
%exception;
int tdb_reopen(TDB_CONTEXT *tdb);
int tdb_reopen_all(int parent_longlived);
void tdb_logging_function(TDB_CONTEXT *tdb, tdb_log_func);
enum TDB_ERROR tdb_error(TDB_CONTEXT *tdb);
const char *tdb_errorstr(TDB_CONTEXT *tdb);
TDB_DATA tdb_fetch(TDB_CONTEXT *tdb, TDB_DATA key);
int tdb_delete(TDB_CONTEXT *tdb, TDB_DATA key);
int tdb_store(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA dbuf, int flag = TDB_REPLACE);
int tdb_append(TDB_CONTEXT *tdb, TDB_DATA key, TDB_DATA new_dbuf);
int tdb_close(TDB_CONTEXT *tdb);
TDB_DATA tdb_firstkey(TDB_CONTEXT *tdb);
TDB_DATA tdb_nextkey(TDB_CONTEXT *tdb, TDB_DATA key);
int tdb_traverse(TDB_CONTEXT *tdb, tdb_traverse_func fn, void *state);
int tdb_exists(TDB_CONTEXT *tdb, TDB_DATA key);
int tdb_lockall(TDB_CONTEXT *tdb);
void tdb_unlockall(TDB_CONTEXT *tdb);
/* Low level locking functions: use with care */
int tdb_chainlock(TDB_CONTEXT *tdb, TDB_DATA key);
int tdb_chainunlock(TDB_CONTEXT *tdb, TDB_DATA key);
/* Debug functions. Not used in production. */
void tdb_dump_all(TDB_CONTEXT *tdb);
int tdb_printfreelist(TDB_CONTEXT *tdb);
Samba/source/lib/tdb/tdb.pc.in
+10
View File
@@ -0,0 +1,10 @@
prefix=@prefix@
exec_prefix=@exec_prefix@
libdir=@libdir@
includedir=@includedir@
Name: tdb
Description: A trivial database
Version: 4.0
Libs: -L${libdir} -ltdb
Cflags: -I${includedir}
Samba/source/lib/tdb/tools/tdbbackup.c
+125
View File
@@ -0,0 +1,125 @@
/*
Unix SMB/CIFS implementation.
low level tdb backup and restore utility
Copyright (C) Andrew Tridgell 2002
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
This program is meant for backup/restore of tdb databases. Typical usage would be:
tdbbackup *.tdb
when Samba shuts down cleanly, which will make a backup of all the local databases
to *.bak files. Then on Samba startup you would use:
tdbbackup -v *.tdb
and this will check the databases for corruption and if corruption is detected then
the backup will be restored.
You may also like to do a backup on a regular basis while Samba is
running, perhaps using cron.
The reason this program is needed is to cope with power failures
while Samba is running. A power failure could lead to database
corruption and Samba will then not start correctly.
Note that many of the databases in Samba are transient and thus
don't need to be backed up, so you can optimise the above a little
by only running the backup on the critical databases.
*/
#include "replace.h"
#include "tdb.h"
#include "system/filesys.h"
/*
see if one file is newer than another
*/
static int file_newer(const char *fname1, const char *fname2)
{
struct stat st1, st2;
if (stat(fname1, &st1) != 0) {
return 0;
}
if (stat(fname2, &st2) != 0) {
return 1;
}
return (st1.st_mtime > st2.st_mtime);
}
static void usage(void)
{
printf("Usage: tdbbackup [options] <fname...>\n\n");
printf(" -h this help message\n");
printf(" -s suffix set the backup suffix\n");
printf(" -v verify mode (restore if corrupt)\n");
}
int main(int argc, char *argv[])
{
int i;
int ret = 0;
int c;
int verify = 0;
const char *suffix = ".bak";
extern int optind;
extern char *optarg;
while ((c = getopt(argc, argv, "vhs:")) != -1) {
switch (c) {
case 'h':
usage();
exit(0);
case 'v':
verify = 1;
break;
case 's':
suffix = optarg;
break;
}
}
argc -= optind;
argv += optind;
if (argc < 1) {
usage();
exit(1);
}
for (i=0; i<argc; i++) {
const char *fname = argv[i];
char *bak_name;
bak_name = add_suffix(fname, suffix);
if (verify) {
if (verify_tdb(fname, bak_name) != 0) {
ret = 1;
}
} else {
if (file_newer(fname, bak_name) &&
backup_tdb(fname, bak_name) != 0) {
ret = 1;
}
}
free(bak_name);
}
return ret;
}
Samba/source/lib/tdb/tools/tdbdump.c
+79
View File
@@ -0,0 +1,79 @@
/*
Unix SMB/CIFS implementation.
simple tdb dump util
Copyright (C) Andrew Tridgell 2001
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "replace.h"
#include "tdb.h"
#include "system/locale.h"
#include "system/filesys.h"
static void print_data(TDB_DATA d)
{
unsigned char *p = (unsigned char *)d.dptr;
int len = d.dsize;
while (len--) {
if (isprint(*p) && !strchr("\"\\", *p)) {
fputc(*p, stdout);
} else {
printf("\\%02X", *p);
}
p++;
}
}
static int traverse_fn(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
{
printf("{\n");
printf("key = \"");
print_data(key);
printf("\"\n");
printf("data = \"");
print_data(dbuf);
printf("\"\n");
printf("}\n");
return 0;
}
static int dump_tdb(const char *fname)
{
struct tdb_context *tdb;
tdb = tdb_open(fname, 0, 0, O_RDONLY, 0);
if (!tdb) {
printf("Failed to open %s\n", fname);
return 1;
}
tdb_traverse(tdb, traverse_fn, NULL);
return 0;
}
int main(int argc, char *argv[])
{
char *fname;
if (argc < 2) {
printf("Usage: tdbdump <fname>\n");
exit(1);
}
fname = argv[1];
return dump_tdb(fname);
}
Samba/source/lib/tdb/tools/tdbtest.c
+265
View File
@@ -0,0 +1,265 @@
/* a test program for tdb - the trivial database */
#include "replace.h"
#include "tdb.h"
#include "system/filesys.h"
#include "system/time.h"
#include <gdbm.h>
#define DELETE_PROB 7
#define STORE_PROB 5
static struct tdb_context *db;
static GDBM_FILE gdbm;
struct timeval tp1,tp2;
static void _start_timer(void)
{
gettimeofday(&tp1,NULL);
}
static double _end_timer(void)
{
gettimeofday(&tp2,NULL);
return((tp2.tv_sec - tp1.tv_sec) +
(tp2.tv_usec - tp1.tv_usec)*1.0e-6);
}
static void fatal(const char *why)
{
perror(why);
exit(1);
}
#ifdef PRINTF_ATTRIBUTE
static void tdb_log(struct tdb_context *tdb, int level, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
#endif
static void tdb_log(struct tdb_context *tdb, int level, const char *format, ...)
{
va_list ap;
va_start(ap, format);
vfprintf(stdout, format, ap);
va_end(ap);
fflush(stdout);
}
static void compare_db(void)
{
TDB_DATA d, key, nextkey;
datum gd, gkey, gnextkey;
key = tdb_firstkey(db);
while (key.dptr) {
d = tdb_fetch(db, key);
gkey.dptr = key.dptr;
gkey.dsize = key.dsize;
gd = gdbm_fetch(gdbm, gkey);
if (!gd.dptr) fatal("key not in gdbm");
if (gd.dsize != d.dsize) fatal("data sizes differ");
if (memcmp(gd.dptr, d.dptr, d.dsize)) {
fatal("data differs");
}
nextkey = tdb_nextkey(db, key);
free(key.dptr);
free(d.dptr);
free(gd.dptr);
key = nextkey;
}
gkey = gdbm_firstkey(gdbm);
while (gkey.dptr) {
gd = gdbm_fetch(gdbm, gkey);
key.dptr = gkey.dptr;
key.dsize = gkey.dsize;
d = tdb_fetch(db, key);
if (!d.dptr) fatal("key not in db");
if (d.dsize != gd.dsize) fatal("data sizes differ");
if (memcmp(d.dptr, gd.dptr, gd.dsize)) {
fatal("data differs");
}
gnextkey = gdbm_nextkey(gdbm, gkey);
free(gkey.dptr);
free(gd.dptr);
free(d.dptr);
gkey = gnextkey;
}
}
static char *randbuf(int len)
{
char *buf;
int i;
buf = (char *)malloc(len+1);
for (i=0;i<len;i++) {
buf[i] = 'a' + (rand() % 26);
}
buf[i] = 0;
return buf;
}
static void addrec_db(void)
{
int klen, dlen;
char *k, *d;
TDB_DATA key, data;
klen = 1 + (rand() % 4);
dlen = 1 + (rand() % 100);
k = randbuf(klen);
d = randbuf(dlen);
key.dptr = k;
key.dsize = klen+1;
data.dptr = d;
data.dsize = dlen+1;
if (rand() % DELETE_PROB == 0) {
tdb_delete(db, key);
} else if (rand() % STORE_PROB == 0) {
if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
fatal("tdb_store failed");
}
} else {
data = tdb_fetch(db, key);
if (data.dptr) free(data.dptr);
}
free(k);
free(d);
}
static void addrec_gdbm(void)
{
int klen, dlen;
char *k, *d;
datum key, data;
klen = 1 + (rand() % 4);
dlen = 1 + (rand() % 100);
k = randbuf(klen);
d = randbuf(dlen);
key.dptr = k;
key.dsize = klen+1;
data.dptr = d;
data.dsize = dlen+1;
if (rand() % DELETE_PROB == 0) {
gdbm_delete(gdbm, key);
} else if (rand() % STORE_PROB == 0) {
if (gdbm_store(gdbm, key, data, GDBM_REPLACE) != 0) {
fatal("gdbm_store failed");
}
} else {
data = gdbm_fetch(gdbm, key);
if (data.dptr) free(data.dptr);
}
free(k);
free(d);
}
static int traverse_fn(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
{
#if 0
printf("[%s] [%s]\n", key.dptr, dbuf.dptr);
#endif
tdb_delete(tdb, key);
return 0;
}
static void merge_test(void)
{
int i;
char keys[5][2];
char tdata[] = "test";
TDB_DATA key, data;
for (i = 0; i < 5; i++) {
snprintf(keys[i],2, "%d", i);
key.dptr = keys[i];
key.dsize = 2;
data.dptr = tdata;
data.dsize = 4;
if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
fatal("tdb_store failed");
}
}
key.dptr = keys[0];
tdb_delete(db, key);
key.dptr = keys[4];
tdb_delete(db, key);
key.dptr = keys[2];
tdb_delete(db, key);
key.dptr = keys[1];
tdb_delete(db, key);
key.dptr = keys[3];
tdb_delete(db, key);
}
int main(int argc, const char *argv[])
{
int i, seed=0;
int loops = 10000;
int num_entries;
char test_gdbm[] = "test.gdbm";
unlink("test.gdbm");
db = tdb_open("test.tdb", 0, TDB_CLEAR_IF_FIRST,
O_RDWR | O_CREAT | O_TRUNC, 0600);
gdbm = gdbm_open(test_gdbm, 512, GDBM_WRITER|GDBM_NEWDB|GDBM_FAST,
0600, NULL);
if (!db || !gdbm) {
fatal("db open failed");
}
#if 1
srand(seed);
_start_timer();
for (i=0;i<loops;i++) addrec_gdbm();
printf("gdbm got %.2f ops/sec\n", i/_end_timer());
#endif
merge_test();
srand(seed);
_start_timer();
for (i=0;i<loops;i++) addrec_db();
printf("tdb got %.2f ops/sec\n", i/_end_timer());
if (tdb_validate_freelist(db, &num_entries) == -1) {
printf("tdb freelist is corrupt\n");
} else {
printf("tdb freelist is good (%d entries)\n", num_entries);
}
compare_db();
printf("traversed %d records\n", tdb_traverse(db, traverse_fn, NULL));
printf("traversed %d records\n", tdb_traverse(db, traverse_fn, NULL));
tdb_close(db);
gdbm_close(gdbm);
return 0;
}
Samba/source/lib/tdb/tools/tdbtool.c
+542
View File
@@ -0,0 +1,542 @@
/*
Unix SMB/CIFS implementation.
Samba database functions
Copyright (C) Andrew Tridgell 1999-2000
Copyright (C) Paul `Rusty' Russell 2000
Copyright (C) Jeremy Allison 2000
Copyright (C) Andrew Esh 2001
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <time.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <ctype.h>
#include <signal.h>
#include <stdarg.h>
#include "tdb.h"
/* a tdb tool for manipulating a tdb database */
#define FSTRING_LEN 256
typedef char fstring[FSTRING_LEN];
typedef struct connections_key {
pid_t pid;
int cnum;
fstring name;
} connections_key;
typedef struct connections_data {
int magic;
pid_t pid;
int cnum;
uid_t uid;
gid_t gid;
char name[24];
char addr[24];
char machine[128];
time_t start;
} connections_data;
static struct tdb_context *tdb;
static int print_rec(struct tdb_context *the_tdb, TDB_DATA key, TDB_DATA dbuf, void *state);
static void print_asc(unsigned char *buf,int len)
{
int i;
/* We're probably printing ASCII strings so don't try to display
the trailing NULL character. */
if (buf[len - 1] == 0)
len--;
for (i=0;i<len;i++)
printf("%c",isprint(buf[i])?buf[i]:'.');
}
#ifdef PRINTF_ATTRIBUTE
static void tdb_log(struct tdb_context *t, enum tdb_debug_level level, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
#endif
static void tdb_log(struct tdb_context *t, enum tdb_debug_level level, const char *format, ...)
{
va_list ap;
va_start(ap, format);
vfprintf(stdout, format, ap);
va_end(ap);
fflush(stdout);
}
static void print_data(unsigned char *buf,int len)
{
int i=0;
if (len<=0) return;
printf("[%03X] ",i);
for (i=0;i<len;) {
printf("%02X ",(int)buf[i]);
i++;
if (i%8 == 0) printf(" ");
if (i%16 == 0) {
print_asc(&buf[i-16],8); printf(" ");
print_asc(&buf[i-8],8); printf("\n");
if (i<len) printf("[%03X] ",i);
}
}
if (i%16) {
int n;
n = 16 - (i%16);
printf(" ");
if (n>8) printf(" ");
while (n--) printf(" ");
n = i%16;
if (n > 8) n = 8;
print_asc(&buf[i-(i%16)],n); printf(" ");
n = (i%16) - n;
if (n>0) print_asc(&buf[i-n],n);
printf("\n");
}
}
static void help(void)
{
printf("\n"
"tdbtool: \n"
" create dbname : create a database\n"
" open dbname : open an existing database\n"
" erase : erase the database\n"
" dump : dump the database as strings\n"
" insert key data : insert a record\n"
" move key file : move a record to a destination tdb\n"
" store key data : store a record (replace)\n"
" show key : show a record by key\n"
" delete key : delete a record by key\n"
" list : print the database hash table and freelist\n"
" free : print the database freelist\n"
" 1 | first : print the first record\n"
" n | next : print the next record\n"
" q | quit : terminate\n"
" \\n : repeat 'next' command\n"
"\n");
}
static void terror(const char *why)
{
printf("%s\n", why);
}
static char *get_token(int startover)
{
static char tmp[1024];
static char *cont = NULL;
char *insert, *start;
char *k = strtok(NULL, " ");
if (!k)
return NULL;
if (startover)
start = tmp;
else
start = cont;
strcpy(start, k);
insert = start + strlen(start) - 1;
while (*insert == '\\') {
*insert++ = ' ';
k = strtok(NULL, " ");
if (!k)
break;
strcpy(insert, k);
insert = start + strlen(start) - 1;
}
/* Get ready for next call */
cont = start + strlen(start) + 1;
return start;
}
static void create_tdb(void)
{
char *tok = get_token(1);
struct tdb_logging_context log_ctx;
log_ctx.log_fn = tdb_log;
if (!tok) {
help();
return;
}
if (tdb) tdb_close(tdb);
tdb = tdb_open_ex(tok, 0, TDB_CLEAR_IF_FIRST,
O_RDWR | O_CREAT | O_TRUNC, 0600, &log_ctx, NULL);
if (!tdb) {
printf("Could not create %s: %s\n", tok, strerror(errno));
}
}
static void open_tdb(void)
{
struct tdb_logging_context log_ctx;
char *tok = get_token(1);
log_ctx.log_fn = tdb_log;
if (!tok) {
help();
return;
}
if (tdb) tdb_close(tdb);
tdb = tdb_open_ex(tok, 0, 0, O_RDWR, 0600, &log_ctx, NULL);
if (!tdb) {
printf("Could not open %s: %s\n", tok, strerror(errno));
}
}
static void insert_tdb(void)
{
char *k = get_token(1);
char *d = get_token(0);
TDB_DATA key, dbuf;
if (!k || !d) {
help();
return;
}
key.dptr = (unsigned char *)k;
key.dsize = strlen(k)+1;
dbuf.dptr = (unsigned char *)d;
dbuf.dsize = strlen(d)+1;
if (tdb_store(tdb, key, dbuf, TDB_INSERT) == -1) {
terror("insert failed");
}
}
static void store_tdb(void)
{
char *k = get_token(1);
char *d = get_token(0);
TDB_DATA key, dbuf;
if (!k || !d) {
help();
return;
}
key.dptr = (unsigned char *)k;
key.dsize = strlen(k)+1;
dbuf.dptr = (unsigned char *)d;
dbuf.dsize = strlen(d)+1;
printf("Storing key:\n");
print_rec(tdb, key, dbuf, NULL);
if (tdb_store(tdb, key, dbuf, TDB_REPLACE) == -1) {
terror("store failed");
}
}
static void show_tdb(void)
{
char *k = get_token(1);
TDB_DATA key, dbuf;
if (!k) {
help();
return;
}
key.dptr = (unsigned char *)k;
key.dsize = strlen(k)+1;
dbuf = tdb_fetch(tdb, key);
if (!dbuf.dptr) {
/* maybe it is non-NULL terminated key? */
key.dsize = strlen(k);
dbuf = tdb_fetch(tdb, key);
if ( !dbuf.dptr ) {
terror("fetch failed");
return;
}
}
/* printf("%s : %*.*s\n", k, (int)dbuf.dsize, (int)dbuf.dsize, dbuf.dptr); */
print_rec(tdb, key, dbuf, NULL);
free( dbuf.dptr );
return;
}
static void delete_tdb(void)
{
char *k = get_token(1);
TDB_DATA key;
if (!k) {
help();
return;
}
key.dptr = (unsigned char *)k;
key.dsize = strlen(k)+1;
if (tdb_delete(tdb, key) != 0) {
terror("delete failed");
}
}
static void move_rec(void)
{
char *k = get_token(1);
char *file = get_token(0);
TDB_DATA key, dbuf;
struct tdb_context *dst_tdb;
struct tdb_logging_context log_ctx;
log_ctx.log_fn = tdb_log;
if (!k) {
help();
return;
}
if ( !file ) {
terror("need destination tdb name");
return;
}
key.dptr = (unsigned char *)k;
key.dsize = strlen(k)+1;
dbuf = tdb_fetch(tdb, key);
if (!dbuf.dptr) {
/* maybe it is non-NULL terminated key? */
key.dsize = strlen(k);
dbuf = tdb_fetch(tdb, key);
if ( !dbuf.dptr ) {
terror("fetch failed");
return;
}
}
print_rec(tdb, key, dbuf, NULL);
dst_tdb = tdb_open_ex(file, 0, 0, O_RDWR, 0600, &log_ctx, NULL);
if ( !dst_tdb ) {
terror("unable to open destination tdb");
return;
}
if ( tdb_store( dst_tdb, key, dbuf, TDB_REPLACE ) == -1 ) {
terror("failed to move record");
}
else
printf("record moved\n");
tdb_close( dst_tdb );
return;
}
static int print_rec(struct tdb_context *the_tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
{
printf("\nkey %d bytes\n", key.dsize);
print_asc(key.dptr, key.dsize);
printf("\ndata %d bytes\n", dbuf.dsize);
print_data(dbuf.dptr, dbuf.dsize);
return 0;
}
static int print_key(struct tdb_context *the_tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
{
print_asc(key.dptr, key.dsize);
printf("\n");
return 0;
}
static int total_bytes;
static int traverse_fn(struct tdb_context *the_tdb, TDB_DATA key, TDB_DATA dbuf, void *state)
{
total_bytes += dbuf.dsize;
return 0;
}
static void info_tdb(void)
{
int count;
total_bytes = 0;
if ((count = tdb_traverse(tdb, traverse_fn, NULL) == -1))
printf("Error = %s\n", tdb_errorstr(tdb));
else
printf("%d records totalling %d bytes\n", count, total_bytes);
}
static char *tdb_getline(const char *prompt)
{
static char line[1024];
char *p;
fputs(prompt, stdout);
line[0] = 0;
p = fgets(line, sizeof(line)-1, stdin);
if (p) p = strchr(p, '\n');
if (p) *p = 0;
return p?line:NULL;
}
static int do_delete_fn(struct tdb_context *the_tdb, TDB_DATA key, TDB_DATA dbuf,
void *state)
{
return tdb_delete(the_tdb, key);
}
static void first_record(struct tdb_context *the_tdb, TDB_DATA *pkey)
{
TDB_DATA dbuf;
*pkey = tdb_firstkey(the_tdb);
dbuf = tdb_fetch(the_tdb, *pkey);
if (!dbuf.dptr) terror("fetch failed");
else {
/* printf("%s : %*.*s\n", k, (int)dbuf.dsize, (int)dbuf.dsize, dbuf.dptr); */
print_rec(the_tdb, *pkey, dbuf, NULL);
}
}
static void next_record(struct tdb_context *the_tdb, TDB_DATA *pkey)
{
TDB_DATA dbuf;
*pkey = tdb_nextkey(the_tdb, *pkey);
dbuf = tdb_fetch(the_tdb, *pkey);
if (!dbuf.dptr)
terror("fetch failed");
else
/* printf("%s : %*.*s\n", k, (int)dbuf.dsize, (int)dbuf.dsize, dbuf.dptr); */
print_rec(the_tdb, *pkey, dbuf, NULL);
}
int main(int argc, char *argv[])
{
int bIterate = 0;
char *line;
char *tok;
TDB_DATA iterate_kbuf;
if (argv[1]) {
static char tmp[1024];
sprintf(tmp, "open %s", argv[1]);
tok=strtok(tmp," ");
open_tdb();
}
while ((line = tdb_getline("tdb> "))) {
/* Shell command */
if (line[0] == '!') {
system(line + 1);
continue;
}
if ((tok = strtok(line," "))==NULL) {
if (bIterate)
next_record(tdb, &iterate_kbuf);
continue;
}
if (strcmp(tok,"create") == 0) {
bIterate = 0;
create_tdb();
continue;
} else if (strcmp(tok,"open") == 0) {
open_tdb();
continue;
} else if ((strcmp(tok, "q") == 0) ||
(strcmp(tok, "quit") == 0)) {
break;
}
/* all the rest require a open database */
if (!tdb) {
bIterate = 0;
terror("database not open");
help();
continue;
}
if (strcmp(tok,"insert") == 0) {
bIterate = 0;
insert_tdb();
} else if (strcmp(tok,"store") == 0) {
bIterate = 0;
store_tdb();
} else if (strcmp(tok,"show") == 0) {
bIterate = 0;
show_tdb();
} else if (strcmp(tok,"erase") == 0) {
bIterate = 0;
tdb_traverse(tdb, do_delete_fn, NULL);
} else if (strcmp(tok,"delete") == 0) {
bIterate = 0;
delete_tdb();
} else if (strcmp(tok,"dump") == 0) {
bIterate = 0;
tdb_traverse(tdb, print_rec, NULL);
} else if (strcmp(tok,"move") == 0) {
bIterate = 0;
move_rec();
} else if (strcmp(tok,"list") == 0) {
tdb_dump_all(tdb);
} else if (strcmp(tok, "free") == 0) {
tdb_printfreelist(tdb);
} else if (strcmp(tok,"info") == 0) {
info_tdb();
} else if ( (strcmp(tok, "1") == 0) ||
(strcmp(tok, "first") == 0)) {
bIterate = 1;
first_record(tdb, &iterate_kbuf);
} else if ((strcmp(tok, "n") == 0) ||
(strcmp(tok, "next") == 0)) {
next_record(tdb, &iterate_kbuf);
} else if ((strcmp(tok, "keys") == 0)) {
bIterate = 0;
tdb_traverse(tdb, print_key, NULL);
} else {
help();
}
}
if (tdb) tdb_close(tdb);
return 0;
}
Samba/source/lib/tdb/tools/tdbtorture.c
+318
View File
@@ -0,0 +1,318 @@
/* this tests tdb by doing lots of ops from several simultaneous
writers - that stresses the locking code.
*/
#include "replace.h"
#include "tdb.h"
#include "system/time.h"
#include "system/wait.h"
#include "system/filesys.h"
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#define REOPEN_PROB 30
#define DELETE_PROB 8
#define STORE_PROB 4
#define APPEND_PROB 6
#define TRANSACTION_PROB 10
#define LOCKSTORE_PROB 5
#define TRAVERSE_PROB 20
#define TRAVERSE_READ_PROB 20
#define CULL_PROB 100
#define KEYLEN 3
#define DATALEN 100
static struct tdb_context *db;
static int in_transaction;
static int error_count;
#ifdef PRINTF_ATTRIBUTE
static void tdb_log(struct tdb_context *tdb, enum tdb_debug_level level, const char *format, ...) PRINTF_ATTRIBUTE(3,4);
#endif
static void tdb_log(struct tdb_context *tdb, enum tdb_debug_level level, const char *format, ...)
{
va_list ap;
error_count++;
va_start(ap, format);
vfprintf(stdout, format, ap);
va_end(ap);
fflush(stdout);
#if 0
{
char *ptr;
asprintf(&ptr,"xterm -e gdb /proc/%d/exe %d", getpid(), getpid());
system(ptr);
free(ptr);
}
#endif
}
static void fatal(const char *why)
{
perror(why);
error_count++;
}
static char *randbuf(int len)
{
char *buf;
int i;
buf = (char *)malloc(len+1);
for (i=0;i<len;i++) {
buf[i] = 'a' + (rand() % 26);
}
buf[i] = 0;
return buf;
}
static int cull_traverse(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
void *state)
{
#if CULL_PROB
if (random() % CULL_PROB == 0) {
tdb_delete(tdb, key);
}
#endif
return 0;
}
static void addrec_db(void)
{
int klen, dlen;
char *k, *d;
TDB_DATA key, data;
klen = 1 + (rand() % KEYLEN);
dlen = 1 + (rand() % DATALEN);
k = randbuf(klen);
d = randbuf(dlen);
key.dptr = (unsigned char *)k;
key.dsize = klen+1;
data.dptr = (unsigned char *)d;
data.dsize = dlen+1;
#if TRANSACTION_PROB
if (in_transaction == 0 && random() % TRANSACTION_PROB == 0) {
if (tdb_transaction_start(db) != 0) {
fatal("tdb_transaction_start failed");
}
in_transaction++;
goto next;
}
if (in_transaction && random() % TRANSACTION_PROB == 0) {
if (tdb_transaction_commit(db) != 0) {
fatal("tdb_transaction_commit failed");
}
in_transaction--;
goto next;
}
if (in_transaction && random() % TRANSACTION_PROB == 0) {
if (tdb_transaction_cancel(db) != 0) {
fatal("tdb_transaction_cancel failed");
}
in_transaction--;
goto next;
}
#endif
#if REOPEN_PROB
if (in_transaction == 0 && random() % REOPEN_PROB == 0) {
tdb_reopen_all(0);
goto next;
}
#endif
#if DELETE_PROB
if (random() % DELETE_PROB == 0) {
tdb_delete(db, key);
goto next;
}
#endif
#if STORE_PROB
if (random() % STORE_PROB == 0) {
if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
fatal("tdb_store failed");
}
goto next;
}
#endif
#if APPEND_PROB
if (random() % APPEND_PROB == 0) {
if (tdb_append(db, key, data) != 0) {
fatal("tdb_append failed");
}
goto next;
}
#endif
#if LOCKSTORE_PROB
if (random() % LOCKSTORE_PROB == 0) {
tdb_chainlock(db, key);
data = tdb_fetch(db, key);
if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
fatal("tdb_store failed");
}
if (data.dptr) free(data.dptr);
tdb_chainunlock(db, key);
goto next;
}
#endif
#if TRAVERSE_PROB
if (random() % TRAVERSE_PROB == 0) {
tdb_traverse(db, cull_traverse, NULL);
goto next;
}
#endif
#if TRAVERSE_READ_PROB
if (random() % TRAVERSE_READ_PROB == 0) {
tdb_traverse_read(db, NULL, NULL);
goto next;
}
#endif
data = tdb_fetch(db, key);
if (data.dptr) free(data.dptr);
next:
free(k);
free(d);
}
static int traverse_fn(struct tdb_context *tdb, TDB_DATA key, TDB_DATA dbuf,
void *state)
{
tdb_delete(tdb, key);
return 0;
}
static void usage(void)
{
printf("Usage: tdbtorture [-n NUM_PROCS] [-l NUM_LOOPS] [-s SEED] [-H HASH_SIZE]\n");
exit(0);
}
int main(int argc, char * const *argv)
{
int i, seed = -1;
int num_procs = 3;
int num_loops = 5000;
int hash_size = 2;
int c;
extern char *optarg;
pid_t *pids;
struct tdb_logging_context log_ctx;
log_ctx.log_fn = tdb_log;
while ((c = getopt(argc, argv, "n:l:s:H:h")) != -1) {
switch (c) {
case 'n':
num_procs = strtol(optarg, NULL, 0);
break;
case 'l':
num_loops = strtol(optarg, NULL, 0);
break;
case 'H':
hash_size = strtol(optarg, NULL, 0);
break;
case 's':
seed = strtol(optarg, NULL, 0);
break;
default:
usage();
}
}
unlink("torture.tdb");
pids = calloc(sizeof(pid_t), num_procs);
pids[0] = getpid();
for (i=0;i<num_procs-1;i++) {
if ((pids[i+1]=fork()) == 0) break;
}
db = tdb_open_ex("torture.tdb", hash_size, TDB_CLEAR_IF_FIRST,
O_RDWR | O_CREAT, 0600, &log_ctx, NULL);
if (!db) {
fatal("db open failed");
}
if (seed == -1) {
seed = (getpid() + time(NULL)) & 0x7FFFFFFF;
}
if (i == 0) {
printf("testing with %d processes, %d loops, %d hash_size, seed=%d\n",
num_procs, num_loops, hash_size, seed);
}
srand(seed + i);
srandom(seed + i);
for (i=0;i<num_loops && error_count == 0;i++) {
addrec_db();
}
if (error_count == 0) {
tdb_traverse_read(db, NULL, NULL);
tdb_traverse(db, traverse_fn, NULL);
tdb_traverse(db, traverse_fn, NULL);
}
tdb_close(db);
if (getpid() != pids[0]) {
return error_count;
}
for (i=1;i<num_procs;i++) {
int status, j;
pid_t pid;
if (error_count != 0) {
/* try and stop the test on any failure */
for (j=1;j<num_procs;j++) {
if (pids[j] != 0) {
kill(pids[j], SIGTERM);
}
}
}
pid = waitpid(-1, &status, 0);
if (pid == -1) {
perror("failed to wait for child\n");
exit(1);
}
for (j=1;j<num_procs;j++) {
if (pids[j] == pid) break;
}
if (j == num_procs) {
printf("unknown child %d exited!?\n", (int)pid);
exit(1);
}
if (WEXITSTATUS(status) != 0) {
printf("child %d exited with status %d\n",
(int)pid, WEXITSTATUS(status));
error_count++;
}
pids[j] = 0;
}
if (error_count == 0) {
printf("OK\n");
}
return error_count;
}