static int ipc_mgmt_req(struct tgtadm_req *req, struct concat_buf *b)
{
int err, fd = 0, done = 0;
req->len = sizeof(*req) + b->size;
err = ipc_mgmt_connect(&fd);
if (err < 0) {
eprintf("can't connect to tgt daemon, %m\n");
goto out;
}
err = write(fd, req, sizeof(*req));
if (err < 0 || err != sizeof(*req)) {
eprintf("failed to send request hdr to tgt daemon, %m\n");
err = errno;
goto out;
}
while (done < b->size) {
err = concat_write(b, fd, done);
if (err > 0)
done += err;
else if (errno != EAGAIN) {
eprintf("failed to send request buf to "
"tgt daemon, %m\n");
err = errno;
goto out;
}
}
dprintf("sent to tgtd %d\n", req->len);
err = ipc_mgmt_rsp(fd, req);
out:
if (fd > 0)
close(fd);
concat_buf_release(b);
return err;
}
static void mtask_recv_send_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)) {
mtask->req_bsize = req->len - sizeof(*req);
if (!mtask->req_bsize) {
err = mtask_received(mtask, fd);
if (err)
goto out;
} else {
/* the pdu exists */
if (mtask->req_bsize > MAX_MGT_BUFSIZE) {
eprintf("mtask buffer len: %d too large\n",
mtask->req_bsize);
mtask->req_bsize = 0;
goto out;
}
mtask->req_buf = zalloc(mtask->req_bsize);
if (!mtask->req_buf) {
eprintf("can't allocate mtask buffer len: %d\n",
mtask->req_bsize);
mtask->req_bsize = 0;
goto out;
}
mtask->mtask_state = MTASK_STATE_PDU_RECV;
mtask->done = 0;
}
}
} else
if (errno != EAGAIN)
goto out;
break;
case MTASK_STATE_PDU_RECV:
len = mtask->req_bsize - mtask->done;
err = read(fd, mtask->req_buf + mtask->done, len);
if (err > 0) {
mtask->done += err;
if (mtask->done == mtask->req_bsize) {
err = mtask_received(mtask, fd);
if (err)
goto out;
}
} else
if (errno != EAGAIN)
goto out;
break;
case MTASK_STATE_HDR_SEND:
p = (char *)rsp + mtask->done;
len = sizeof(*rsp) - mtask->done;
err = write(fd, p, len);
if (err > 0) {
mtask->done += err;
if (mtask->done == sizeof(*rsp)) {
if (rsp->len == sizeof(*rsp))
goto out;
mtask->done = 0;
mtask->mtask_state = MTASK_STATE_PDU_SEND;
}
} else
if (errno != EAGAIN)
goto out;
break;
case MTASK_STATE_PDU_SEND:
err = concat_write(&mtask->rsp_concat, fd, mtask->done);
if (err >= 0) {
mtask->done += err;
if (mtask->done == (rsp->len - sizeof(*rsp)))
goto out;
} else
if (errno != EAGAIN)
goto out;
break;
default:
eprintf("unknown state %d\n", mtask->mtask_state);
}
return;
out:
if (req->mode == MODE_SYSTEM && req->op == OP_DELETE && !rsp->err)
system_active = 0;
tgt_event_del(fd);
close(fd);
mtask_free(mtask);
}
