int mars_recv_dent_list(struct mars_socket *sock, struct list_head *anchor)
{
int status;
for (;;) {
struct mars_dent *dent = brick_zmem_alloc(sizeof(struct mars_dent));
if (!dent)
return -ENOMEM;
//MARS_IO("\n");
INIT_LIST_HEAD(&dent->dent_link);
INIT_LIST_HEAD(&dent->brick_list);
status = mars_recv_struct(sock, dent, mars_dent_meta);
if (status <= 0) {
mars_free_dent(dent);
goto done;
}
list_add_tail(&dent->dent_link, anchor);
}
done:
return status;
}
static
int receiver_thread(void *data)
{
struct client_output *output = data;
int status = 0;
while (!brick_thread_should_stop()) {
struct mars_cmd cmd = {};
struct list_head *tmp;
struct client_mref_aspect *mref_a = NULL;
struct mref_object *mref = NULL;
unsigned long flags;
status = mars_recv_struct(&output->socket, &cmd, mars_cmd_meta);
MARS_IO("got cmd = %d status = %d\n", cmd.cmd_code, status);
if (status < 0)
goto done;
switch (cmd.cmd_code & CMD_FLAG_MASK) {
case CMD_NOTIFY:
mars_trigger();
break;
case CMD_CONNECT:
if (cmd.cmd_int1 < 0) {
status = cmd.cmd_int1;
MARS_ERR("at remote side: brick connect failed, remote status = %d\n", status);
goto done;
}
break;
case CMD_CB:
{
int hash_index = cmd.cmd_int1 % CLIENT_HASH_MAX;
traced_lock(&output->lock, flags);
for (tmp = output->hash_table[hash_index].next; tmp != &output->hash_table[hash_index]; tmp = tmp->next) {
struct mref_object *tmp_mref;
mref_a = container_of(tmp, struct client_mref_aspect, hash_head);
tmp_mref = mref_a->object;
if (unlikely(!tmp_mref)) {
traced_unlock(&output->lock, flags);
MARS_ERR("bad internal mref pointer\n");
status = -EBADR;
goto done;
}
if (tmp_mref->ref_id == cmd.cmd_int1) {
mref = tmp_mref;
list_del_init(&mref_a->hash_head);
list_del_init(&mref_a->io_head);
break;
}
}
traced_unlock(&output->lock, flags);
if (unlikely(!mref)) {
MARS_WRN("got unknown id = %d for callback\n", cmd.cmd_int1);
status = -EBADR;
goto done;
}
MARS_IO("got callback id = %d, old pos = %lld len = %d rw = %d\n", mref->ref_id, mref->ref_pos, mref->ref_len, mref->ref_rw);
status = mars_recv_cb(&output->socket, mref, &cmd);
MARS_IO("new status = %d, pos = %lld len = %d rw = %d\n", status, mref->ref_pos, mref->ref_len, mref->ref_rw);
if (unlikely(status < 0)) {
MARS_WRN("interrupted data transfer during callback, status = %d\n", status);
_hash_insert(output, mref_a);
goto done;
}
SIMPLE_CALLBACK(mref, 0);
client_ref_put(output, mref);
atomic_dec(&output->fly_count);
atomic_dec(&mars_global_io_flying);
break;
}
case CMD_GETINFO:
status = mars_recv_struct(&output->socket, &output->info, mars_info_meta);
if (status < 0) {
MARS_WRN("got bad info from remote side, status = %d\n", status);
goto done;
}
output->got_info = true;
wake_up_interruptible(&output->info_event);
break;
default:
MARS_ERR("got bad command %d from remote side, terminating.\n", cmd.cmd_code);
status = -EBADR;
goto done;
}
done:
brick_string_free(cmd.cmd_str1);
if (unlikely(status < 0)) {
if (!output->recv_error) {
MARS_DBG("signalling status = %d\n", status);
output->recv_error = status;
}
wake_up_interruptible(&output->event);
brick_msleep(100);
}
}
if (status < 0) {
MARS_WRN("receiver thread terminated with status = %d, recv_error = %d\n", status, output->recv_error);
}
mars_shutdown_socket(&output->socket);
wake_up_interruptible(&output->receiver.run_event);
return status;
}