tree a6edc9886cb2415ad4021fd0e3e4c9ca40a5aa65
parent c8dc20a825644bb4003ecb62e0eb2d20c8eaf6c8
author Willy Tarreau <w@1wt.eu> 1574958898 +0100
committer Willy Tarreau <w@1wt.eu> 1577451873 +0100
encoding latin1

BUG/MINOR: connection: only wake send/recv callbacks if the FD is active

Since commit c3df4507fa ("MEDIUM: connections: Wake the upper layer even
if sending/receiving is disabled.") the send/recv callbacks are called
on I/O if the FD is ready and not just if it's active. This means that
in some situations (e.g. send ready but nothing to send) we may
needlessly enter the if() block, notice we're not subscribed, set
io_available=1 and call the wake() callback even if we're just called
for read activity. Better make sure we only do this when the FD is
active in that direction..

This may be backported as far as 2.0 though it should remain under
observation for a few weeks first as the risk of harm by a mistake
is higher than the trouble it should cause.