On Fri, Aug 04, 2017 at 06:14:27PM +0300, Vladimir Sementsov-Ogievskiy wrote:
> Fix nbd_send_request to return int, as it returns a return value
> of nbd_write (which is int), and the only user of nbd_send_request's
> return value (nbd_co_send_request) consider it as int too.

The real problem here is the return value of nbd_write() - it should be
a ssize_t, not an int, since it is propagating the return value of
nbd_rwv() which is ssize_t. Basically all functions that do I/O and
return the number of bytes read/written should be ssize_t - any use of
int is a bug.

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