+++ /dev/null
-/*
- 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 "includes.h"
-#include "dbwrap.h"
-#include "lib/util/tdb_wrap.h"
-
-struct db_tdb_ctx {
- struct tdb_wrap *wtdb;
-};
-
-static NTSTATUS db_tdb_store(struct db_record *rec, TDB_DATA data, int flag);
-static NTSTATUS db_tdb_delete(struct db_record *rec);
-
-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);
-
- /* This hex_encode_talloc() call allocates memory on data context. By way how current
- __talloc_free() code works, it is OK to allocate in the destructor as
- the children of data will be freed after call to the destructor and this
- new 'child' will be caught and freed correctly.
- */
- DEBUG(10, (DEBUGLEVEL > 10
- ? "Unlocking key %s\n" : "Unlocking key %.20s\n",
- hex_encode_talloc(data, (unsigned char *)data->key.dptr,
- data->key.dsize)));
-
- 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;
-
- state->result = (struct db_record *)talloc_size(
- state->mem_ctx,
- sizeof(struct db_record) + key.dsize + data.dsize);
-
- if (state->result == NULL) {
- return 0;
- }
-
- state->result->key.dsize = key.dsize;
- state->result->key.dptr = ((uint8 *)state->result)
- + sizeof(struct db_record);
- memcpy(state->result->key.dptr, key.dptr, key.dsize);
-
- state->result->value.dsize = data.dsize;
-
- if (data.dsize > 0) {
- state->result->value.dptr = state->result->key.dptr+key.dsize;
- memcpy(state->result->value.dptr, data.dptr, data.dsize);
- }
- else {
- state->result->value.dptr = NULL;
- }
-
- return 0;
-}
-
-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);
- struct tdb_fetch_locked_state state;
-
- /* Do not accidently allocate/deallocate w/o need when debug level is lower than needed */
- if(DEBUGLEVEL >= 10) {
- char *keystr = hex_encode_talloc(talloc_tos(), (unsigned char*)key.dptr, key.dsize);
- DEBUG(10, (DEBUGLEVEL > 10
- ? "Locking key %s\n" : "Locking key %.20s\n",
- keystr));
- TALLOC_FREE(keystr);
- }
-
- if (tdb_chainlock(ctx->wtdb->tdb, key) != 0) {
- DEBUG(3, ("tdb_chainlock failed\n"));
- return NULL;
- }
-
- state.mem_ctx = mem_ctx;
- state.result = NULL;
-
- tdb_parse_record(ctx->wtdb->tdb, key, db_tdb_fetchlock_parse, &state);
-
- 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 = talloc_reference(state.result, ctx);
- state.result->store = db_tdb_store;
- state.result->delete_rec = db_tdb_delete;
-
- DEBUG(10, ("Allocated locked data 0x%p\n", state.result));
-
- return state.result;
-}
-
-struct tdb_fetch_state {
- TALLOC_CTX *mem_ctx;
- int result;
- TDB_DATA data;
-};
-
-static int db_tdb_fetch_parse(TDB_DATA key, TDB_DATA data,
- void *private_data)
-{
- struct tdb_fetch_state *state =
- (struct tdb_fetch_state *)private_data;
-
- state->data.dptr = (uint8 *)talloc_memdup(state->mem_ctx, data.dptr,
- data.dsize);
- if (state->data.dptr == NULL) {
- state->result = -1;
- return 0;
- }
-
- state->data.dsize = data.dsize;
- return 0;
-}
-
-static int db_tdb_fetch(struct db_context *db, TALLOC_CTX *mem_ctx,
- TDB_DATA key, TDB_DATA *pdata)
-{
- struct db_tdb_ctx *ctx = talloc_get_type_abort(
- db->private_data, struct db_tdb_ctx);
-
- struct tdb_fetch_state state;
-
- state.mem_ctx = mem_ctx;
- state.result = 0;
- state.data = tdb_null;
-
- tdb_parse_record(ctx->wtdb->tdb, key, db_tdb_fetch_parse, &state);
-
- if (state.result == -1) {
- return -1;
- }
-
- *pdata = state.data;
- return 0;
-}
-
-static int db_tdb_parse(struct db_context *db, TDB_DATA key,
- int (*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);
-
- return tdb_parse_record(ctx->wtdb->tdb, key, parser, private_data);
-}
-
-static NTSTATUS db_tdb_store(struct db_record *rec, TDB_DATA data, int flag)
-{
- struct db_tdb_ctx *ctx = talloc_get_type_abort(rec->private_data,
- struct db_tdb_ctx);
-
- /*
- * 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.
- */
-
- return (tdb_store(ctx->wtdb->tdb, rec->key, data, flag) == 0) ?
- NT_STATUS_OK : NT_STATUS_UNSUCCESSFUL;
-}
-
-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.store = db_tdb_store;
- rec.delete_rec = db_tdb_delete;
- rec.private_data = ctx->db->private_data;
-
- 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_store_deny(struct db_record *rec, TDB_DATA data, 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.store = db_tdb_store_deny;
- rec.delete_rec = db_tdb_delete_deny;
- rec.private_data = ctx->db->private_data;
-
- 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_get_flags(struct db_context *db)
-
-{
- struct db_tdb_ctx *db_ctx =
- talloc_get_type_abort(db->private_data, struct db_tdb_ctx);
- return tdb_get_flags(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);
-}
-
-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);
-}
-
-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;
-}
-
-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)
-{
- struct db_context *result = NULL;
- struct db_tdb_ctx *db_tdb;
-
- 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;
- }
-
- 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;
- }
-
- result->fetch_locked = db_tdb_fetch_locked;
- result->fetch = db_tdb_fetch;
- 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->get_flags = db_tdb_get_flags;
- result->persistent = ((tdb_flags & TDB_CLEAR_IF_FIRST) == 0);
- result->transaction_start = db_tdb_transaction_start;
- result->transaction_commit = db_tdb_transaction_commit;
- result->transaction_cancel = db_tdb_transaction_cancel;
- return result;
-
- fail:
- if (result != NULL) {
- TALLOC_FREE(result);
- }
- return NULL;
-}
git.samba.org / nivanova / samba-autobuild / .git / blobdiff