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...ter. */ + void *writer_data; + writer_cb writer; + int writer_error; + /* Generic way to read into a buffer - set rbuf to point to a * buffer, rlen to the amount of data you expect, and in the state * machine call recv_into_rbuf. diff --git a/lib/socket.c b/lib/socket.c index f48e455..c6fba6d 100644 --- a/lib/socket.c +++ b/lib/socket.c @@ -46,10 +46,24 @@ socket_send (struct nbd_handle *h, { ssize_t r; - r = send (sock->u.fd, buf, len, 0); - if (r == -1 && errno != EAGAIN && errno != EWOULDBLOCK) - set_error (errno, "send"); - return r; + if (!...

This works, but there's no time saving and I'm still investigating whether it does what I think it does. Nevertheless I thought I would post it because it (probably) implements the idea I had last night outlined in: https://www.redhat.com/archives/libguestfs/2019-June/msg00010.html The meat of the change is patch 4. Patch 5 is an example which I would probably fold into patch 4 for