Beispiel #1
0
int connections_forall_read(int (*fn)(const struct connections_key *key,
				      const struct connections_data *data,
				      void *private_data),
			    void *private_data)
{
	struct db_context *ctx;
	struct conn_traverse_read_state state;
	NTSTATUS status;
	int count;

	ctx = connections_db_ctx(false);
	if (ctx == NULL) {
		return -1;
	}

	state.fn = fn;
	state.private_data = private_data;

	status = dbwrap_traverse_read(ctx, connections_forall_read_fn,
				      (void *)&state, &count);

	if (!NT_STATUS_IS_OK(status)) {
		return -1;
	}

	return count;
}
Beispiel #2
0
NTSTATUS smbXsrv_open_global_traverse(
			int (*fn)(struct smbXsrv_open_global0 *, void *),
			void *private_data)
{

	NTSTATUS status;
	int count = 0;
	struct smbXsrv_open_global_traverse_state state = {
		.fn = fn,
		.private_data = private_data,
	};

	become_root();
	status = smbXsrv_open_global_init();
	if (!NT_STATUS_IS_OK(status)) {
		unbecome_root();
		DEBUG(0, ("Failed to initialize open_global: %s\n",
			  nt_errstr(status)));
		return status;
	}

	status = dbwrap_traverse_read(smbXsrv_open_global_db_ctx,
				      smbXsrv_open_global_traverse_fn,
				      &state,
				      &count);
	unbecome_root();

	return status;
}
static bool get_group_map_from_ntname(const char *name, GROUP_MAP *map)
{
	struct find_map_state state;

	state.found = false;
	state.name = name;
	state.map = map;

	dbwrap_traverse_read(db, find_map, (void *)&state, NULL);

	return state.found;
}
static bool get_group_map_from_gid(gid_t gid, GROUP_MAP *map)
{
	struct find_map_state state;

	state.found = false;
	state.name = NULL;	/* Indicate we're looking for gid */
	state.gid = gid;
	state.map = map;

	dbwrap_traverse_read(db, find_map, (void *)&state, NULL);

	return state.found;
}
Beispiel #5
0
static int dbwrap_cache_traverse_read(struct db_context *db,
				      int (*f)(struct db_record *rec,
					       void *private_data),
				      void *private_data)
{
	struct db_cache_ctx *ctx = talloc_get_type_abort(
		db->private_data, struct db_cache_ctx);
	NTSTATUS status;
	int ret;
	status = dbwrap_traverse_read(ctx->backing, f, private_data, &ret);
	if (!NT_STATUS_IS_OK(status)) {
		return -1;
	}
	return ret;
}
Beispiel #6
0
static int dbwrap_tool_listkeys(struct db_context *db,
				const char *keyname,
				const char *data)
{
	NTSTATUS status;

	status = dbwrap_traverse_read(db, listkey_fn, NULL, NULL);

	if (!NT_STATUS_IS_OK(status)) {
		d_fprintf(stderr, "ERROR listing db keys\n");
		return -1;
	}

	return 0;
}
Beispiel #7
0
bool serverid_traverse_read(int (*fn)(const struct server_id *id,
				      uint32_t msg_flags, void *private_data),
			    void *private_data)
{
	struct db_context *db;
	struct serverid_traverse_read_state state;
	NTSTATUS status;

	db = serverid_db();
	if (db == NULL) {
		return false;
	}
	state.fn = fn;
	state.private_data = private_data;

	status = dbwrap_traverse_read(db, serverid_traverse_read_fn, &state,
				      NULL);
	return NT_STATUS_IS_OK(status);
}
Beispiel #8
0
static NTSTATUS printer_list_traverse(printer_list_trv_fn_t *fn,
				      void *private_data,
				      bool read_only)
{
	struct db_context *db;
	NTSTATUS status;

	db = get_printer_list_db();
	if (db == NULL) {
		return NT_STATUS_INTERNAL_DB_CORRUPTION;
	}

	if (read_only) {
		status = dbwrap_traverse_read(db, fn, private_data, NULL);
	} else {
		status = dbwrap_traverse(db, fn, private_data, NULL);
	}

	return status;
}
Beispiel #9
0
static NTSTATUS smb1srv_tcon_local_allocate_id(struct db_context *db,
					       uint32_t lowest_id,
					       uint32_t highest_id,
					       TALLOC_CTX *mem_ctx,
					       struct db_record **_rec,
					       uint32_t *_id)
{
	struct smb1srv_tcon_local_allocate_state state = {
		.lowest_id = lowest_id,
		.highest_id = highest_id,
		.last_id = 0,
		.useable_id = lowest_id,
		.status = NT_STATUS_INTERNAL_ERROR,
	};
	uint32_t i;
	uint32_t range;
	NTSTATUS status;
	int count = 0;

	*_rec = NULL;
	*_id = 0;

	if (lowest_id > highest_id) {
		return NT_STATUS_INSUFFICIENT_RESOURCES;
	}

	/*
	 * first we try randomly
	 */
	range = (highest_id - lowest_id) + 1;

	for (i = 0; i < (range / 2); i++) {
		uint32_t id;
		uint8_t key_buf[SMBXSRV_TCON_LOCAL_TDB_KEY_SIZE];
		TDB_DATA key;
		TDB_DATA val;
		struct db_record *rec = NULL;

		id = generate_random() % range;
		id += lowest_id;

		if (id < lowest_id) {
			id = lowest_id;
		}
		if (id > highest_id) {
			id = highest_id;
		}

		key = smbXsrv_tcon_local_id_to_key(id, key_buf);

		rec = dbwrap_fetch_locked(db, mem_ctx, key);
		if (rec == NULL) {
			return NT_STATUS_INSUFFICIENT_RESOURCES;
		}

		val = dbwrap_record_get_value(rec);
		if (val.dsize != 0) {
			TALLOC_FREE(rec);
			continue;
		}

		*_rec = rec;
		*_id = id;
		return NT_STATUS_OK;
	}

	/*
	 * if the range is almost full,
	 * we traverse the whole table
	 * (this relies on sorted behavior of dbwrap_rbt)
	 */
	status = dbwrap_traverse_read(db, smb1srv_tcon_local_allocate_traverse,
				      &state, &count);
	if (NT_STATUS_IS_OK(status)) {
		if (NT_STATUS_IS_OK(state.status)) {
			return NT_STATUS_INTERNAL_ERROR;
		}

		if (!NT_STATUS_EQUAL(state.status, NT_STATUS_INTERNAL_ERROR)) {
			return state.status;
		}

		if (state.useable_id <= state.highest_id) {
			state.status = NT_STATUS_OK;
		} else {
			return NT_STATUS_INSUFFICIENT_RESOURCES;
		}
	} else if (!NT_STATUS_EQUAL(status, NT_STATUS_INTERNAL_DB_CORRUPTION)) {
		/*
		 * Here we really expect NT_STATUS_INTERNAL_DB_CORRUPTION!
		 *
		 * If we get anything else it is an error, because it
		 * means we did not manage to find a free slot in
		 * the db.
		 */
		return NT_STATUS_INSUFFICIENT_RESOURCES;
	}

	if (NT_STATUS_IS_OK(state.status)) {
		uint32_t id;
		uint8_t key_buf[SMBXSRV_TCON_LOCAL_TDB_KEY_SIZE];
		TDB_DATA key;
		TDB_DATA val;
		struct db_record *rec = NULL;

		id = state.useable_id;

		key = smbXsrv_tcon_local_id_to_key(id, key_buf);

		rec = dbwrap_fetch_locked(db, mem_ctx, key);
		if (rec == NULL) {
			return NT_STATUS_INSUFFICIENT_RESOURCES;
		}

		val = dbwrap_record_get_value(rec);
		if (val.dsize != 0) {
			TALLOC_FREE(rec);
			return NT_STATUS_INTERNAL_DB_CORRUPTION;
		}

		*_rec = rec;
		*_id = id;
		return NT_STATUS_OK;
	}

	return state.status;
}

struct smbXsrv_tcon_local_fetch_state {
	struct smbXsrv_tcon *tcon;
	NTSTATUS status;
};

static void smbXsrv_tcon_local_fetch_parser(TDB_DATA key, TDB_DATA data,
					    void *private_data)
{
	struct smbXsrv_tcon_local_fetch_state *state =
		(struct smbXsrv_tcon_local_fetch_state *)private_data;
	void *ptr;

	if (data.dsize != sizeof(ptr)) {
		state->status = NT_STATUS_INTERNAL_DB_ERROR;
		return;
	}

	memcpy(&ptr, data.dptr, data.dsize);
	state->tcon = talloc_get_type_abort(ptr, struct smbXsrv_tcon);
	state->status = NT_STATUS_OK;
}

static NTSTATUS smbXsrv_tcon_local_lookup(struct smbXsrv_tcon_table *table,
					  uint32_t tcon_local_id,
					  NTTIME now,
					  struct smbXsrv_tcon **_tcon)
{
	struct smbXsrv_tcon_local_fetch_state state = {
		.tcon = NULL,
		.status = NT_STATUS_INTERNAL_ERROR,
	};
	uint8_t key_buf[SMBXSRV_TCON_LOCAL_TDB_KEY_SIZE];
	TDB_DATA key;
	NTSTATUS status;

	*_tcon = NULL;

	if (tcon_local_id == 0) {
		return NT_STATUS_NETWORK_NAME_DELETED;
	}

	if (table == NULL) {
		/* this might happen before the end of negprot */
		return NT_STATUS_NETWORK_NAME_DELETED;
	}

	if (table->local.db_ctx == NULL) {
		return NT_STATUS_INTERNAL_ERROR;
	}

	key = smbXsrv_tcon_local_id_to_key(tcon_local_id, key_buf);

	status = dbwrap_parse_record(table->local.db_ctx, key,
				     smbXsrv_tcon_local_fetch_parser,
				     &state);
	if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_FOUND)) {
		return NT_STATUS_NETWORK_NAME_DELETED;
	} else if (!NT_STATUS_IS_OK(status)) {
		return status;
	}
	if (!NT_STATUS_IS_OK(state.status)) {
		return state.status;
	}

	if (NT_STATUS_EQUAL(state.tcon->status, NT_STATUS_NETWORK_NAME_DELETED)) {
		return NT_STATUS_NETWORK_NAME_DELETED;
	}

	state.tcon->idle_time = now;

	*_tcon = state.tcon;
	return state.tcon->status;
}

static int smbXsrv_tcon_global_destructor(struct smbXsrv_tcon_global0 *global)
{
	return 0;
}

static void smbXsrv_tcon_global_verify_record(struct db_record *db_rec,
					bool *is_free,
					bool *was_free,
					TALLOC_CTX *mem_ctx,
					struct smbXsrv_tcon_global0 **_g);

static NTSTATUS smbXsrv_tcon_global_allocate(struct db_context *db,
					TALLOC_CTX *mem_ctx,
					struct smbXsrv_tcon_global0 **_global)
{
	uint32_t i;
	struct smbXsrv_tcon_global0 *global = NULL;
	uint32_t last_free = 0;
	const uint32_t min_tries = 3;

	*_global = NULL;

	global = talloc_zero(mem_ctx, struct smbXsrv_tcon_global0);
	if (global == NULL) {
		return NT_STATUS_NO_MEMORY;
	}
	talloc_set_destructor(global, smbXsrv_tcon_global_destructor);

	/*
	 * Here we just randomly try the whole 32-bit space
	 *
	 * We use just 32-bit, because we want to reuse the
	 * ID for SRVSVC.
	 */
	for (i = 0; i < UINT32_MAX; i++) {
		bool is_free = false;
		bool was_free = false;
		uint32_t id;
		uint8_t key_buf[SMBXSRV_TCON_GLOBAL_TDB_KEY_SIZE];
		TDB_DATA key;

		if (i >= min_tries && last_free != 0) {
			id = last_free;
		} else {
			id = generate_random();
		}
		if (id == 0) {
			id++;
		}
		if (id == UINT32_MAX) {
			id--;
		}

		key = smbXsrv_tcon_global_id_to_key(id, key_buf);

		global->db_rec = dbwrap_fetch_locked(db, mem_ctx, key);
		if (global->db_rec == NULL) {
			talloc_free(global);
			return NT_STATUS_INSUFFICIENT_RESOURCES;
		}

		smbXsrv_tcon_global_verify_record(global->db_rec,
						  &is_free,
						  &was_free,
						  NULL, NULL);

		if (!is_free) {
			TALLOC_FREE(global->db_rec);
			continue;
		}

		if (!was_free && i < min_tries) {
			/*
			 * The session_id is free now,
			 * but was not free before.
			 *
			 * This happens if a smbd crashed
			 * and did not cleanup the record.
			 *
			 * If this is one of our first tries,
			 * then we try to find a real free one.
			 */
			if (last_free == 0) {
				last_free = id;
			}
			TALLOC_FREE(global->db_rec);
			continue;
		}

		global->tcon_global_id = id;

		*_global = global;
		return NT_STATUS_OK;
	}

	/* should not be reached */
	talloc_free(global);
	return NT_STATUS_INTERNAL_ERROR;
}
Beispiel #10
0
/*
 * Fallback check operation: just traverse.
 */
static int dbwrap_fallback_check(struct db_context *db)
{
	NTSTATUS status = dbwrap_traverse_read(db, do_nothing, NULL, NULL);
	return NT_STATUS_IS_OK(status) ? 0 : -1;
}