search for: nbd_callback_set_cr

...telling the user which subset of buf was just populated, and where > status is data, hole, or error. The signature may still need tweaking. > Or we may even want to let the user register a set of callbacks, where a > different callback is invoked for different chunk types: > > set = nbd_callback_set_create(nbd, NBD_CMD_READ, opaque, default_cb, > default_error_cb); > nbd_callback_set_add(nbd, set, NBD_REPLY_TYPE_OFFSET_DATA, opaque, cb); > nbd_callback_set_add(nbd, set, NBD_REPLY_TYPE_OFFSET_HOLE, opaque, cb); > nbd_pread_callback(nbd, buf, count, offset, set, flags); This would also...

On Mon, May 27, 2019 at 09:01:01PM -0500, Eric Blake wrote: > diff --git a/lib/rw.c b/lib/rw.c > index feaf468..343c340 100644 > --- a/lib/rw.c > +++ b/lib/rw.c > @@ -234,11 +234,17 @@ int64_t > nbd_unlocked_aio_pread (struct nbd_handle *h, void *buf, > size_t count, uint64_t offset, uint32_t flags) > { > - if (flags != 0) { > + if ((flags

...count, offset, status) telling the user which subset of buf was just populated, and where status is data, hole, or error. The signature may still need tweaking. Or we may even want to let the user register a set of callbacks, where a different callback is invoked for different chunk types: set = nbd_callback_set_create(nbd, NBD_CMD_READ, opaque, default_cb, default_error_cb); nbd_callback_set_add(nbd, set, NBD_REPLY_TYPE_OFFSET_DATA, opaque, cb); nbd_callback_set_add(nbd, set, NBD_REPLY_TYPE_OFFSET_HOLE, opaque, cb); nbd_pread_callback(nbd, buf, count, offset, set, flags); The idea of registering a set of ca...