static void
dowakeup(struct shmif_sc *sc)
{
struct rumpuser_iovec iov;
uint32_t ver = SHMIF_VERSION;
size_t n;
iov.iov_base = &ver;
iov.iov_len = sizeof(ver);
rumpuser_iovwrite(sc->sc_memfd, &iov, 1, IFMEM_WAKEUP, &n);
}
/*
* Read requests from /dev/puffs and forward them to comfd
*
* XXX: the init detection is really sucky, but let's not
* waste too much energy for a better one here
*/
static void
readthread(void *arg)
{
struct ptargs *pap = arg;
struct file *fp;
register_t rv;
char *buf;
off_t off;
int error, inited;
buf = kmem_alloc(BUFSIZE, KM_SLEEP);
inited = 0;
retry:
kpause(NULL, 0, hz/4, NULL);
for (;;) {
size_t n;
off = 0;
fp = fd_getfile(pap->fpfd);
if (fp == NULL)
error = EINVAL;
else
error = dofileread(pap->fpfd, fp, buf, BUFSIZE,
&off, 0, &rv);
if (error) {
if (error == ENOENT && inited == 0)
goto retry;
if (error == ENXIO)
break;
panic("fileread failed: %d", error);
}
inited = 1;
while (rv) {
struct rumpuser_iovec iov;
iov.iov_base = buf;
iov.iov_len = rv;
error = rumpuser_iovwrite(pap->comfd, &iov, 1,
RUMPUSER_IOV_NOSEEK, &n);
if (error)
panic("fileread failed: %d", error);
if (n == 0)
panic("fileread failed: closed");
rv -= n;
}
}
kthread_exit(0);
}
