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-rw-r--r--lib/dbwrap/dbwrap_tdb.c518
1 files changed, 518 insertions, 0 deletions
diff --git a/lib/dbwrap/dbwrap_tdb.c b/lib/dbwrap/dbwrap_tdb.c
new file mode 100644
index 0000000..6cd95fa
--- /dev/null
+++ b/lib/dbwrap/dbwrap_tdb.c
@@ -0,0 +1,518 @@
+/*
+ Unix SMB/CIFS implementation.
+ Database interface wrapper around tdb
+ Copyright (C) Volker Lendecke 2005-2007
+
+ 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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "replace.h"
+#include "dbwrap/dbwrap.h"
+#include "dbwrap/dbwrap_private.h"
+#include "dbwrap/dbwrap_tdb.h"
+#include "lib/tdb_wrap/tdb_wrap.h"
+#include "lib/util/util_tdb.h"
+#include "lib/util/debug.h"
+#include "lib/util/samba_util.h"
+#include "system/filesys.h"
+#include "lib/param/param.h"
+#include "libcli/util/error.h"
+
+struct db_tdb_ctx {
+ struct tdb_wrap *wtdb;
+
+ struct {
+ dev_t dev;
+ ino_t ino;
+ } id;
+};
+
+static NTSTATUS db_tdb_storev(struct db_record *rec,
+ const TDB_DATA *dbufs, int num_dbufs, int flag);
+static NTSTATUS db_tdb_delete(struct db_record *rec);
+
+static void db_tdb_log_key(const char *prefix, TDB_DATA key)
+{
+ if (DEBUGLEVEL < 10) {
+ return;
+ }
+ if (DEBUGLEVEL == 10) {
+ /*
+ * Only fully spam at debuglevel > 10
+ */
+ key.dsize = MIN(10, key.dsize);
+ }
+
+ if (key.dsize < 1024) {
+ char keystr[key.dsize*2+1];
+ hex_encode_buf(keystr, key.dptr, key.dsize);
+ DBG_DEBUG("%s key %s\n", prefix, keystr);
+ return;
+ }
+
+ dump_data(DEBUGLEVEL, key.dptr, key.dsize);
+}
+
+static int db_tdb_record_destr(struct db_record* data)
+{
+ struct db_tdb_ctx *ctx =
+ talloc_get_type_abort(data->private_data, struct db_tdb_ctx);
+
+ db_tdb_log_key("Unlocking", data->key);
+ tdb_chainunlock(ctx->wtdb->tdb, data->key);
+ return 0;
+}
+
+struct tdb_fetch_locked_state {
+ TALLOC_CTX *mem_ctx;
+ struct db_record *result;
+};
+
+static int db_tdb_fetchlock_parse(TDB_DATA key, TDB_DATA data,
+ void *private_data)
+{
+ struct tdb_fetch_locked_state *state =
+ (struct tdb_fetch_locked_state *)private_data;
+ struct db_record *result;
+
+ result = (struct db_record *)talloc_size(
+ state->mem_ctx,
+ sizeof(struct db_record) + key.dsize + data.dsize);
+
+ if (result == NULL) {
+ return 0;
+ }
+ state->result = result;
+
+ result->key.dsize = key.dsize;
+ result->key.dptr = ((uint8_t *)result) + sizeof(struct db_record);
+ memcpy(result->key.dptr, key.dptr, key.dsize);
+
+ result->value.dsize = data.dsize;
+
+ if (data.dsize > 0) {
+ result->value.dptr = result->key.dptr+key.dsize;
+ memcpy(result->value.dptr, data.dptr, data.dsize);
+ }
+ else {
+ result->value.dptr = NULL;
+ }
+ result->value_valid = true;
+
+ return 0;
+}
+
+static struct db_record *db_tdb_fetch_locked_internal(
+ struct db_context *db,
+ struct db_tdb_ctx *ctx,
+ TALLOC_CTX *mem_ctx,
+ TDB_DATA key)
+{
+ struct tdb_fetch_locked_state state;
+ int ret;
+
+ state = (struct tdb_fetch_locked_state) {
+ .mem_ctx = mem_ctx,
+ };
+
+ ret = tdb_parse_record(ctx->wtdb->tdb,
+ key,
+ db_tdb_fetchlock_parse,
+ &state);
+ if ((ret < 0) && (tdb_error(ctx->wtdb->tdb) != TDB_ERR_NOEXIST)) {
+ tdb_chainunlock(ctx->wtdb->tdb, key);
+ return NULL;
+ }
+
+ if (state.result == NULL) {
+ db_tdb_fetchlock_parse(key, tdb_null, &state);
+ }
+
+ if (state.result == NULL) {
+ tdb_chainunlock(ctx->wtdb->tdb, key);
+ return NULL;
+ }
+
+ talloc_set_destructor(state.result, db_tdb_record_destr);
+
+ state.result->private_data = ctx;
+ state.result->storev = db_tdb_storev;
+ state.result->delete_rec = db_tdb_delete;
+
+ DBG_DEBUG("Allocated locked data %p\n", state.result);
+
+ return state.result;
+}
+
+static struct db_record *db_tdb_fetch_locked(
+ struct db_context *db, TALLOC_CTX *mem_ctx, TDB_DATA key)
+{
+ struct db_tdb_ctx *ctx = talloc_get_type_abort(db->private_data,
+ struct db_tdb_ctx);
+
+ db_tdb_log_key("Locking", key);
+ if (tdb_chainlock(ctx->wtdb->tdb, key) != 0) {
+ DEBUG(3, ("tdb_chainlock failed\n"));
+ return NULL;
+ }
+ return db_tdb_fetch_locked_internal(db, ctx, mem_ctx, key);
+}
+
+static NTSTATUS db_tdb_do_locked(struct db_context *db, TDB_DATA key,
+ void (*fn)(struct db_record *rec,
+ TDB_DATA value,
+ void *private_data),
+ void *private_data)
+{
+ struct db_tdb_ctx *ctx = talloc_get_type_abort(
+ db->private_data, struct db_tdb_ctx);
+ uint8_t *buf = NULL;
+ struct db_record rec;
+ int ret;
+
+ ret = tdb_chainlock(ctx->wtdb->tdb, key);
+ if (ret == -1) {
+ enum TDB_ERROR err = tdb_error(ctx->wtdb->tdb);
+ DBG_DEBUG("tdb_chainlock failed: %s\n",
+ tdb_errorstr(ctx->wtdb->tdb));
+ return map_nt_error_from_tdb(err);
+ }
+
+ ret = tdb_fetch_talloc(ctx->wtdb->tdb, key, ctx, &buf);
+
+ if ((ret != 0) && (ret != ENOENT)) {
+ DBG_DEBUG("tdb_fetch_talloc failed: %s\n",
+ strerror(errno));
+ tdb_chainunlock(ctx->wtdb->tdb, key);
+ return map_nt_error_from_unix_common(ret);
+ }
+
+ rec = (struct db_record) {
+ .db = db, .key = key,
+ .value_valid = false,
+ .storev = db_tdb_storev, .delete_rec = db_tdb_delete,
+ .private_data = ctx
+ };
+
+ fn(&rec,
+ (TDB_DATA) { .dptr = buf, .dsize = talloc_get_size(buf) },
+ private_data);
+
+ tdb_chainunlock(ctx->wtdb->tdb, key);
+
+ talloc_free(buf);
+
+ return NT_STATUS_OK;
+}
+
+static int db_tdb_exists(struct db_context *db, TDB_DATA key)
+{
+ struct db_tdb_ctx *ctx = talloc_get_type_abort(
+ db->private_data, struct db_tdb_ctx);
+ return tdb_exists(ctx->wtdb->tdb, key);
+}
+
+static int db_tdb_wipe(struct db_context *db)
+{
+ struct db_tdb_ctx *ctx = talloc_get_type_abort(
+ db->private_data, struct db_tdb_ctx);
+ return tdb_wipe_all(ctx->wtdb->tdb);
+}
+
+static int db_tdb_check(struct db_context *db)
+{
+ struct db_tdb_ctx *ctx = talloc_get_type_abort(
+ db->private_data, struct db_tdb_ctx);
+ return tdb_check(ctx->wtdb->tdb, NULL, NULL);
+}
+
+struct db_tdb_parse_state {
+ void (*parser)(TDB_DATA key, TDB_DATA data,
+ void *private_data);
+ void *private_data;
+};
+
+/*
+ * tdb_parse_record expects a parser returning int, mixing up tdb and
+ * parser errors. Wrap around that by always returning 0 and have
+ * dbwrap_parse_record expect a parser returning void.
+ */
+
+static int db_tdb_parser(TDB_DATA key, TDB_DATA data, void *private_data)
+{
+ struct db_tdb_parse_state *state =
+ (struct db_tdb_parse_state *)private_data;
+ state->parser(key, data, state->private_data);
+ return 0;
+}
+
+static NTSTATUS db_tdb_parse(struct db_context *db, TDB_DATA key,
+ void (*parser)(TDB_DATA key, TDB_DATA data,
+ void *private_data),
+ void *private_data)
+{
+ struct db_tdb_ctx *ctx = talloc_get_type_abort(
+ db->private_data, struct db_tdb_ctx);
+ struct db_tdb_parse_state state;
+ int ret;
+
+ state.parser = parser;
+ state.private_data = private_data;
+
+ ret = tdb_parse_record(ctx->wtdb->tdb, key, db_tdb_parser, &state);
+
+ if (ret != 0) {
+ return map_nt_error_from_tdb(tdb_error(ctx->wtdb->tdb));
+ }
+ return NT_STATUS_OK;
+}
+
+static NTSTATUS db_tdb_storev(struct db_record *rec,
+ const TDB_DATA *dbufs, int num_dbufs, int flag)
+{
+ struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
+ struct db_tdb_ctx);
+ struct tdb_context *tdb = ctx->wtdb->tdb;
+ NTSTATUS status = NT_STATUS_OK;
+ int ret;
+
+ /*
+ * This has a bug: We need to replace rec->value for correct
+ * operation, but right now brlock and locking don't use the value
+ * anymore after it was stored.
+ */
+
+ ret = tdb_storev(tdb, rec->key, dbufs, num_dbufs, flag);
+ if (ret == -1) {
+ enum TDB_ERROR err = tdb_error(tdb);
+ status = map_nt_error_from_tdb(err);
+ }
+ return status;
+}
+
+static NTSTATUS db_tdb_delete(struct db_record *rec)
+{
+ struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
+ struct db_tdb_ctx);
+
+ if (tdb_delete(ctx->wtdb->tdb, rec->key) == 0) {
+ return NT_STATUS_OK;
+ }
+
+ if (tdb_error(ctx->wtdb->tdb) == TDB_ERR_NOEXIST) {
+ return NT_STATUS_NOT_FOUND;
+ }
+
+ return NT_STATUS_UNSUCCESSFUL;
+}
+
+struct db_tdb_traverse_ctx {
+ struct db_context *db;
+ int (*f)(struct db_record *rec, void *private_data);
+ void *private_data;
+};
+
+static int db_tdb_traverse_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
+ void *private_data)
+{
+ struct db_tdb_traverse_ctx *ctx =
+ (struct db_tdb_traverse_ctx *)private_data;
+ struct db_record rec;
+
+ rec.key = kbuf;
+ rec.value = dbuf;
+ rec.value_valid = true;
+ rec.storev = db_tdb_storev;
+ rec.delete_rec = db_tdb_delete;
+ rec.private_data = ctx->db->private_data;
+ rec.db = ctx->db;
+
+ return ctx->f(&rec, ctx->private_data);
+}
+
+static int db_tdb_traverse(struct db_context *db,
+ int (*f)(struct db_record *rec, void *private_data),
+ void *private_data)
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ struct db_tdb_traverse_ctx ctx;
+
+ ctx.db = db;
+ ctx.f = f;
+ ctx.private_data = private_data;
+ return tdb_traverse(db_ctx->wtdb->tdb, db_tdb_traverse_func, &ctx);
+}
+
+static NTSTATUS db_tdb_storev_deny(struct db_record *rec,
+ const TDB_DATA *dbufs, int num_dbufs,
+ int flag)
+{
+ return NT_STATUS_MEDIA_WRITE_PROTECTED;
+}
+
+static NTSTATUS db_tdb_delete_deny(struct db_record *rec)
+{
+ return NT_STATUS_MEDIA_WRITE_PROTECTED;
+}
+
+static int db_tdb_traverse_read_func(TDB_CONTEXT *tdb, TDB_DATA kbuf, TDB_DATA dbuf,
+ void *private_data)
+{
+ struct db_tdb_traverse_ctx *ctx =
+ (struct db_tdb_traverse_ctx *)private_data;
+ struct db_record rec;
+
+ rec.key = kbuf;
+ rec.value = dbuf;
+ rec.value_valid = true;
+ rec.storev = db_tdb_storev_deny;
+ rec.delete_rec = db_tdb_delete_deny;
+ rec.private_data = ctx->db->private_data;
+ rec.db = ctx->db;
+
+ return ctx->f(&rec, ctx->private_data);
+}
+
+static int db_tdb_traverse_read(struct db_context *db,
+ int (*f)(struct db_record *rec, void *private_data),
+ void *private_data)
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ struct db_tdb_traverse_ctx ctx;
+
+ ctx.db = db;
+ ctx.f = f;
+ ctx.private_data = private_data;
+ return tdb_traverse_read(db_ctx->wtdb->tdb, db_tdb_traverse_read_func, &ctx);
+}
+
+static int db_tdb_get_seqnum(struct db_context *db)
+
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ return tdb_get_seqnum(db_ctx->wtdb->tdb);
+}
+
+static int db_tdb_transaction_start(struct db_context *db)
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ return tdb_transaction_start(db_ctx->wtdb->tdb) ? -1 : 0;
+}
+
+static NTSTATUS db_tdb_transaction_start_nonblock(struct db_context *db)
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ int ret;
+
+ ret = tdb_transaction_start_nonblock(db_ctx->wtdb->tdb);
+ if (ret != 0) {
+ return map_nt_error_from_tdb(tdb_error(db_ctx->wtdb->tdb));
+ }
+ return NT_STATUS_OK;
+}
+
+static int db_tdb_transaction_commit(struct db_context *db)
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ return tdb_transaction_commit(db_ctx->wtdb->tdb) ? -1 : 0;
+}
+
+static int db_tdb_transaction_cancel(struct db_context *db)
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+ tdb_transaction_cancel(db_ctx->wtdb->tdb);
+ return 0;
+}
+
+static size_t db_tdb_id(struct db_context *db, uint8_t *id, size_t idlen)
+{
+ struct db_tdb_ctx *db_ctx =
+ talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
+
+ if (idlen >= sizeof(db_ctx->id)) {
+ memcpy(id, &db_ctx->id, sizeof(db_ctx->id));
+ }
+
+ return sizeof(db_ctx->id);
+}
+
+struct db_context *db_open_tdb(TALLOC_CTX *mem_ctx,
+ const char *name,
+ int hash_size, int tdb_flags,
+ int open_flags, mode_t mode,
+ enum dbwrap_lock_order lock_order,
+ uint64_t dbwrap_flags)
+{
+ struct db_context *result = NULL;
+ struct db_tdb_ctx *db_tdb;
+ struct stat st;
+
+ result = talloc_zero(mem_ctx, struct db_context);
+ if (result == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ goto fail;
+ }
+
+ result->private_data = db_tdb = talloc(result, struct db_tdb_ctx);
+ if (db_tdb == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ goto fail;
+ }
+ result->lock_order = lock_order;
+
+ db_tdb->wtdb = tdb_wrap_open(db_tdb, name, hash_size, tdb_flags,
+ open_flags, mode);
+ if (db_tdb->wtdb == NULL) {
+ DEBUG(3, ("Could not open tdb: %s\n", strerror(errno)));
+ goto fail;
+ }
+
+ ZERO_STRUCT(db_tdb->id);
+
+ if (fstat(tdb_fd(db_tdb->wtdb->tdb), &st) == -1) {
+ DEBUG(3, ("fstat failed: %s\n", strerror(errno)));
+ goto fail;
+ }
+ db_tdb->id.dev = st.st_dev;
+ db_tdb->id.ino = st.st_ino;
+
+ result->fetch_locked = db_tdb_fetch_locked;
+ result->do_locked = db_tdb_do_locked;
+ result->traverse = db_tdb_traverse;
+ result->traverse_read = db_tdb_traverse_read;
+ result->parse_record = db_tdb_parse;
+ result->get_seqnum = db_tdb_get_seqnum;
+ result->persistent = ((tdb_flags & TDB_CLEAR_IF_FIRST) == 0);
+ result->transaction_start = db_tdb_transaction_start;
+ result->transaction_start_nonblock = db_tdb_transaction_start_nonblock;
+ result->transaction_commit = db_tdb_transaction_commit;
+ result->transaction_cancel = db_tdb_transaction_cancel;
+ result->exists = db_tdb_exists;
+ result->wipe = db_tdb_wipe;
+ result->id = db_tdb_id;
+ result->check = db_tdb_check;
+ result->name = tdb_name(db_tdb->wtdb->tdb);
+ return result;
+
+ fail:
+ TALLOC_FREE(result);
+ return NULL;
+}