static int smack_backend_read(struct smack_backend *s, void *state, struct dnet_cmd *cmd, void *iodata)
{
struct dnet_io_attr *io = iodata;
char *data;
struct index idx;
int err;
dnet_convert_io_attr(io);
smack_setup_idx(&idx, io->id);
idx.data_size = io->size;
err = smack_read(s->smack, &idx, &data);
if (err < 0)
goto err_out_exit;
io->size = idx.data_size;
err = dnet_send_read_data(state, cmd, io, data, -1, io->offset, 0);
if (err)
goto err_out_free;
err_out_free:
free(data);
err_out_exit:
return err;
}
int ell::honest_command_handler_adaptee::file_read(module_backend_t */*r*/, void *state, dnet_cmd *cmd, void *data)
{
const std::string key(dnet_cmd2string(cmd->id));
const std::string result = m_uncomplicated_handler->read(key);
dnet_io_attr *io = static_cast<dnet_io_attr *>(data);
io->size = result.size();
return dnet_send_read_data(state, cmd, io, (void *)result.data(), -1, io->offset, 0);
}
static int leveldb_backend_read(struct leveldb_backend *s, void *state, struct dnet_cmd *cmd, void *iodata, int last)
{
struct dnet_io_attr *io = iodata;
struct dnet_ext_list elist;
char *data;
size_t data_size;
int err = -EINVAL;
char *error_string = NULL;
dnet_ext_list_init(&elist);
dnet_convert_io_attr(io);
if (io->size || io->offset) {
err = -ERANGE;
goto err_out_exit;
}
data = leveldb_get(s->db, s->roptions, (const char *)io->id, DNET_ID_SIZE, &data_size, &error_string);
if (error_string || !data) {
if (!data)
err = -ENOENT;
goto err_out_exit;
}
/* Extract original data and extension list from &data */
err = dnet_ext_list_extract((void *)&data, (uint64_t *)&data_size,
&elist, DNET_EXT_FREE_ON_DESTROY);
if (err != 0)
goto err_out_exit;
dnet_ext_list_to_io(&elist, io);
io->size = data_size;
if (data_size && data && last)
cmd->flags &= ~DNET_FLAGS_NEED_ACK;
err = dnet_send_read_data(state, cmd, io, data, -1, io->offset, 0);
if (err < 0)
goto err_out_exit;
dnet_backend_log(DNET_LOG_NOTICE, "%s: leveldb: : READ: Ok: size: %llu.\n",
dnet_dump_id(&cmd->id), (unsigned long long)io->size);
err_out_exit:
dnet_ext_list_destroy(&elist);
if (err < 0)
dnet_backend_log(DNET_LOG_ERROR, "%s: leveldb: READ: error: %s: %d\n",
dnet_dump_id(&cmd->id), error_string, err);
free(error_string);
return err;
}
