/*
* ssread - send stream read.
*
* Read while computing incremental checksum
*/
static size_t
ssread(void *buf, size_t len, zio_cksum_t *cksum)
{
size_t outlen;
if ((outlen = fread(buf, len, 1, send_stream)) == 0)
return (0);
if (do_cksum) {
if (do_byteswap)
fletcher_4_incremental_byteswap(buf, len, cksum);
else
fletcher_4_incremental_native(buf, len, cksum);
}
total_stream_len += len;
return (outlen);
}
static int
dump_bytes(dmu_sendarg_t *dsp, void *buf, int len)
{
dsl_dataset_t *ds = dsp->dsa_os->os_dsl_dataset;
ssize_t resid; /* have to get resid to get detailed errno */
ASSERT3U(len % 8, ==, 0);
fletcher_4_incremental_native(buf, len, &dsp->dsa_zc);
dsp->dsa_err = vn_rdwr(UIO_WRITE, dsp->dsa_vp,
(caddr_t)buf, len,
0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid);
mutex_enter(&ds->ds_sendstream_lock);
*dsp->dsa_off += len;
mutex_exit(&ds->ds_sendstream_lock);
return (dsp->dsa_err);
}
void
fletcher_4_native(const void *buf, uint64_t size, zio_cksum_t *zcp)
{
const fletcher_4_ops_t *ops;
uint64_t p2size = P2ALIGN(size, 64);
ASSERT(IS_P2ALIGNED(size, sizeof (uint32_t)));
if (size == 0) {
ZIO_SET_CHECKSUM(zcp, 0, 0, 0, 0);
} else if (p2size == 0) {
ops = &fletcher_4_scalar_ops;
fletcher_4_native_impl(ops, buf, size, zcp);
} else {
ops = fletcher_4_impl_get();
fletcher_4_native_impl(ops, buf, p2size, zcp);
if (p2size < size)
fletcher_4_incremental_native((char *)buf + p2size,
size - p2size, zcp);
}
}
