tree 9e826291fff2b588016cec00f7b2ccb0bc05d999
parent 7f1265a238a1a7b1133bc8a2aaea80245c1a289f
author Willy Tarreau <w@1wt.eu> 1559145048 +0200
committer Willy Tarreau <w@1wt.eu> 1559145275 +0200
encoding latin1

BUG/MEDIUM: mux-h2: don't refrain from offering oneself a used buffer

Usually when calling offer_buffer(), we don't expect to offer it to
ourselves. But with h2 we have the same buffer_wait for the two directions
so we can unblock the recv path when completing a send(), or we can unblock
part of the mux buffer after sending the first few buffers that we managed
to collect. Thus it is important to always accept to wake up any requester.

A few parts of this patch could possibly be backported but earlier versions
already have other issues related to low-buffer condition so it's not sure
it's worth taking the risk to make things worse.