static int mtask_received(struct mgmt_task *mtask, int fd)
{
tgtadm_err adm_err;
int err;
adm_err = mtask_execute(mtask);
set_mtask_result(mtask, adm_err);
/* whatever the result of mtask execution, a response is sent */
mtask->mtask_state = MTASK_STATE_HDR_SEND;
mtask->done = 0;
err = tgt_event_modify(fd, EPOLLOUT);
if (err)
eprintf("failed to modify mgmt task event out\n");
return err;
}
static void mtask_handler(int fd, int events, void *data)
{
int err, len;
char *p;
struct mgmt_task *mtask = data;
struct tgtadm_req *req = &mtask->req;
struct tgtadm_rsp *rsp = &mtask->rsp;
switch (mtask->mtask_state) {
case MTASK_STATE_HDR_RECV:
len = sizeof(*req) - mtask->done;
err = read(fd, (char *)req + mtask->done, len);
if (err > 0) {
mtask->done += err;
if (mtask->done == sizeof(*req)) {
if (req->len == sizeof(*req)) {
tgt_mgmt(mtask);
mtask->mtask_state =
MTASK_STATE_RSP_SEND;
if (tgt_event_modify(fd, EPOLLOUT))
eprintf("failed to modify\n");
mtask->done = 0;
} else {
/* the pdu exists */
mtask->done = 0;
mtask->mtask_state =
MTASK_STATE_PDU_RECV;
if (mtask->bsize < req->len) {
eprintf("FIXME: %d\n", req->len);
goto out;
}
}
}
} else if (errno != EAGAIN)
goto out;
break;
case MTASK_STATE_PDU_RECV:
len = req->len - (sizeof(*req) + mtask->done);
err = read(fd, mtask->buf + mtask->done, len);
if (err > 0) {
mtask->done += err;
if (mtask->done == req->len - (sizeof(*req))) {
tgt_mgmt(mtask);
mtask->mtask_state = MTASK_STATE_RSP_SEND;
if (tgt_event_modify(fd, EPOLLOUT))
eprintf("failed to modify\n");
mtask->done = 0;
}
} else if (errno != EAGAIN)
goto out;
break;
case MTASK_STATE_RSP_SEND:
if (mtask->done < sizeof(*rsp)) {
p = (char *)rsp + mtask->done;
len = sizeof(*rsp) - mtask->done;
} else {
p = mtask->buf + (mtask->done - sizeof(*rsp));
len = rsp->len - mtask->done;
}
err = write(fd, p, len);
if (err > 0) {
mtask->done += err;
if (mtask->done == rsp->len) {
if (req->mode == MODE_SYSTEM &&
req->op == OP_DELETE &&
!rsp->err)
system_active = 0;
goto out;
}
} else if (errno != EAGAIN)
goto out;
break;
default:
eprintf("unknown state %d\n", mtask->mtask_state);
}
return;
out:
tgt_event_del(fd);
free(mtask->buf);
free(mtask);
close(fd);
}